Microchip PIC32 datasheet: 29.2 AC Characteristics and Timing Parameters

29.2 AC Characteristics and Timing Parameters

The information contained in this section defines PIC32MX3XX/4XX AC characteristics and timing parameters.

FIGURE 29-1: LOAD CONDITIONS FOR DEVICE TIMING SPECIFICATIONS

TABLE 29-16: CAPACITIVE LOADING REQUIREMENTS ON OUTPUT PINS

Note 1: Data in “Typical” column is at 3.3V, 25°C unless otherwise stated. Parameters are for design guidance only and are not tested.

FIGURE 29-2: EXTERNAL CLOCK TIMING

TABLE 29-17: EXTERNAL CLOCK TIMING REQUIREMENTS

AC CHARACTERISTICS

Standard Operating Conditions: 2.3V to 3.6V (unless otherwise stated)
Operating temperature -40°C ≤ TA ≤ +85°C for Industrial
-40°C ≤ TA ≤ +105°C for V-Temp

Note 1: Data in “Typical” column is at 3.3V, 25°C unless otherwise stated. Parameters are characterized but are not tested.

2: Instruction cycle period (TCY) equals the input oscillator time base period. All specified values are based on characterization data for that particular oscillator type under standard operating conditions with the device executing code. Exceeding these specified limits may result in an unstable oscillator operation and/or higher than expected current consumption. All devices are tested to operate at “min.” values with an external clock applied to the OSC1/CLKI pin.

3: 40 MHz maximum for PIC32MX320F032H and PIC32MX420F032H devices.

4: PLL input requirements: 4 MHz ≤ FPLLIN ≤ 5 MHz (use PLL prescaler to reduce FOSC). This parameter is characterized, but tested at 10 MHz only at manufacturing.

5: This parameter is characterized, but not tested in manufacturing.

TABLE 29-18: PLL CLOCK TIMING SPECIFICATIONS (VDD = 2.3V TO 3.6V)

Note 1: These parameters are characterized, but not tested in manufacturing.

2: This jitter specification is based on clock-cycle by clock-cycle measurements. To get the effective jitter for individual time-bases on communication clocks, use the following formula:

$$ EffectiveJitter = \frac{D_{CLK}}{\sqrt{\frac{SYSCLK}{CommunicationClock}}} $$

For example, if SYSCLK = 80 MHz and SPI bit rate = 20 MHz, the effective jitter is as follows:

$$ EffectiveJitter = \frac{D_{CLK}}{\sqrt{\frac{80}{20}}} = \frac{D_{CLK}}{2} $$

TABLE 29-19: INTERNAL FRC ACCURACY

Note 1: Frequency calibrated at 25°C and 3.3V. TUN bits can be used to compensate for temperature drift.

TABLE 29-20: INTERNAL RC ACCURACY

Note 1: Change of LPRC frequency as VDD changes.

FIGURE 29-3: I/O TIMING CHARACTERISTICS

Note: Refer to Figure 29-1 for load conditions.

TABLE 29-21: I/O TIMING REQUIREMENTS

AC CHARACTERISTICS

Standard Operating Conditions: 2.3V to 3.6V (unless otherwise stated)
Operating temperature -40°C ≤ TA ≤ +85°C for Industrial
-40°C ≤ TA ≤ +105°C for V-Temp

Note 1: Data in “Typical” column is at 3.3V, 25°C unless otherwise stated.
2: This parameter is characterized, but not tested in manufacturing.

FIGURE 29-4: POWER-ON RESET TIMING CHARACTERISTICS

Internal Voltage Regulator Enabled Clock Sources = (FRC, FRCDIV, FRCDIV16, FRCPLL, EC, ECPLL and LPRC)

Internal Voltage Regulator Enabled Clock Sources = (HS, HSPLL, XT, XTPLL and Sosc)

External VCORE Provided Clock Sources = (FRC, FRCDIV, FRCDIV16, FRCPLL, EC, ECPLL and LPRC)

Note 1: The Power-up period will be extended if the power-up sequence completes before the device exits from BOR ($V_{DD} < V_{DDMIN}$). 2: Includes interval voltage regulator stabilization delay. 3: Power-up Timer (PWRT); only active when the internal voltage regulator is disabled.

FIGURE 29-5: EXTERNAL RESET TIMING CHARACTERISTICS

Clock Sources = (FRC, FRCDIV, FRCDIV16, FRCPLL, EC, ECPLL and LPRC)

Clock Sources = (HS, HSPLL, XT, XTPLL and Sosc)

TABLE 29-22: RESETS TIMING

AC CHARACTERISTICS

Standard Operating Conditions: 2.3V to 3.6V
(unless otherwise stated)
Operating temperature -40°C ≤TA ≤+85°C for Industrial
-40°C ≤TA ≤+105°C for V-Temp

Note 1: These parameters are characterized, but not tested in manufacturing.
2: Data in “Typ” column is at 3.3V, 25°C unless otherwise stated. Characterized by design but not tested.

FIGURE 29-6: TIMER1, 2, 3, 4, 5 EXTERNAL CLOCK TIMING CHARACTERISTICS

Note: Refer to Figure 29-1 for load conditions.

TABLE 29-23: TIMER1 EXTERNAL CLOCK TIMING REQUIREMENTS(1)

AC CHARACTERISTICS

Standard Operating Conditions: 2.3V to 3.6V (unless otherwise stated)
Operating temperature -40°C ≤ TA ≤ +85°C for Industrial
-40°C ≤ TA ≤ +105°C for V-Temp

Note 1: Timer1 is a Type A.
Note 2: This parameter is characterized, but not tested in manufacturing.
Note 3: N = prescale value (1, 8, 64, 256)

TABLE 29-24: TIMER2, 3, 4, 5 EXTERNAL CLOCK TIMING REQUIREMENTS

AC CHARACTERISTICS

Standard Operating Conditions: 2.3V to 3.6V (unless otherwise stated)
Operating temperature -40°C ≤ TA ≤ +85°C for Industrial
-40°C ≤ TA ≤ +105°C for V-Temp

Note 1: These parameters are characterized, but not tested in manufacturing.

FIGURE 29-7: INPUT CAPTURE (CAPx) TIMING CHARACTERISTICS

Note: Refer to Figure 29-1 for load conditions.

TABLE 29-25: INPUT CAPTURE MODULE TIMING REQUIREMENTS

Note 1: These parameters are characterized, but not tested in manufacturing.

FIGURE 29-8: OUTPUT COMPARE MODULE (OCx) TIMING CHARACTERISTICS

Note: Refer to Figure 29-1 for load conditions.

TABLE 29-26: OUTPUT COMPARE MODULE TIMING REQUIREMENTS

Note 1: These parameters are characterized, but not tested in manufacturing.

Note 2: Data in “Typical” column is at 3.3V, 25°C unless otherwise stated. Parameters are for design guidance only and are not tested.

FIGURE 29-9: OC/PWM MODULE TIMING CHARACTERISTICS

Note: Refer to Figure 29-1 for load conditions.

TABLE 29-27: SIMPLE OC/PWM MODE TIMING REQUIREMENTS

AC CHARACTERISTICS

Standard Operating Conditions: 2.3V to 3.6V (unless otherwise stated)
Operating temperature -40°C ≤ TA ≤ +85°C for Industrial
-40°C ≤ TA ≤ +105°C for V-Temp

Note 1: These parameters are characterized, but not tested in manufacturing.
Note 2: Data in “Typical” column is at 3.3V, 25°C unless otherwise stated. Parameters are for design guidance only and are not tested.

FIGURE 29-10: SPIx MODULE MASTER MODE (CKE = 0) TIMING CHARACTERISTICS

Note: Refer to Figure 29-1 for load conditions.

TABLE 29-28: SPIx MASTER MODE (CKE = 0) TIMING REQUIREMENTS

AC CHARACTERISTICS

Standard Operating Conditions: 2.3V to 3.6V (unless otherwise stated)
Operating temperature -40°C ≤TA ≤+85°C for Industrial
-40°C ≤TA ≤+105°C for V-Temp

Note 1: These parameters are characterized, but not tested in manufacturing.
2: Data in “Typical” column is at 3.3V, 25°C unless otherwise stated. Parameters are for design guidance only and are not tested.
3: The minimum clock period for SCKx is 40 ns. Therefore, the clock generated in Master mode must not violate this specification.
4: Assumes 50 pF load on all SPIx pins.

FIGURE 29-11: SPIx MODULE MASTER MODE (CKE = 1) TIMING CHARACTERISTICS

Note: Refer to Figure 29-1 for load conditions.

TABLE 29-29: SPIx MODULE MASTER MODE (CKE = 1) TIMING REQUIREMENTS

AC CHARACTERISTICS

Standard Operating Conditions: 2.3V to 3.6V (unless otherwise stated)
Operating temperature -40°C ≤ TA ≤ +85°C for Industrial
-40°C ≤ TA ≤ +105°C for V-Temp

Note 1: These parameters are characterized, but not tested in manufacturing.
2: Data in “Typical” column is at 3.3V, 25°C unless otherwise stated. Parameters are for design guidance only and are not tested.
3: The minimum clock period for SCKx is 40 ns. Therefore, the clock generated in Master mode must not violate this specification.
4: Assumes 50 pF load on all SPIx pins.

FIGURE 29-12: SPIx MODULE SLAVE MODE (CKE = 0) TIMING CHARACTERISTICS

Note: Refer to Figure 29-1 for load conditions.

TABLE 29-30: SPIx MODULE SLAVE MODE (CKE = 0) TIMING REQUIREMENTS

AC CHARACTERISTICS

Standard Operating Conditions: 2.3V to 3.6V (unless otherwise stated)
Operating temperature -40°C ≤ TA ≤ +85°C for Industrial
-40°C ≤ TA ≤ +105°C for V-Temp

Note 1: These parameters are characterized, but not tested in manufacturing.
2: Data in “Typical” column is at 3.3V, 25°C unless otherwise stated. Parameters are for design guidance only and are not tested.
3: The minimum clock period for SCKx is 40 ns.
4: Assumes 50 pF load on all SPIx pins.

FIGURE 29-13: SPIx MODULE SLAVE MODE (CKE = 1) TIMING CHARACTERISTICS

Note: Refer to Figure 29-1 for load conditions.

TABLE 29-31: SPIx MODULE SLAVE MODE (CKE = 1) TIMING REQUIREMENTS

AC CHARACTERISTICS

Standard Operating Conditions: 2.3V to 3.6V (unless otherwise stated)
Operating temperature -40°C ≤ TA ≤ +85°C for Industrial
-40°C ≤ TA ≤ +105°C for V-Temp

Note 1: These parameters are characterized, but not tested in manufacturing.
Note 2: Data in “Typical” column is at 3.3V, 25°C unless otherwise stated. Parameters are for design guidance only and are not tested.
Note 3: The minimum clock period for SCKx is 40 ns.
Note 4: Assumes 50 pF load on all SPIx pins.

FIGURE 29-14: I2Cx BUS START/STOP BITS TIMING CHARACTERISTICS (MASTER MODE)

Note: Refer to Figure 29-1 for load conditions.

FIGURE 29-15: I2Cx BUS DATA TIMING CHARACTERISTICS (MASTER MODE)

Note: Refer to Figure 29-1 for load conditions.

TABLE 29-32: I2Cx BUS DATA TIMING REQUIREMENTS (MASTER MODE)

AC CHARACTERISTICS

Standard Operating Conditions: 2.3V to 3.6V (unless otherwise stated)
Operating temperature -40°C ≤ TA ≤ +85°C for Industrial
-40°C ≤ TA ≤ +105°C for V-Temp

Note 1: BRG is the value of the I²C™ Baud Rate Generator.
2: Maximum pin capacitance = 10 pF for all I2Cx pins (for 1 MHz mode only).
3: The typical value for this parameter is 104 ns.

FIGURE 29-16: I2Cx BUS START/STOP BITS TIMING CHARACTERISTICS (SLAVE MODE)

Note: Refer to Figure 29-1 for load conditions.

FIGURE 29-17: I2Cx BUS DATA TIMING CHARACTERISTICS (SLAVE MODE)

Note: Refer to Figure 29-1 for load conditions.

TABLE 29-33: I2Cx BUS DATA TIMING REQUIREMENTS (SLAVE MODE)

AC CHARACTERISTICS

Standard Operating Conditions: 2.3V to 3.6V (unless otherwise stated)
Operating temperature -40°C ≤TA ≤+85°C for Industrial
-40°C ≤TA ≤+105°C for V-Temp

Note 1: Maximum pin capacitance = 10 pF for all I2Cx pins (for 1 MHz mode only).

DS61143H-page 178 © 2011 Microchip Technology Inc.

TABLE 29-34: ADC MODULE SPECIFICATIONS

AC CHARACTERISTICS

Standard Operating Conditions: 2.3V to 3.6V (unless otherwise stated)
Operating temperature -40°C ≤ TA ≤ +85°C for Industrial
-40°C ≤ TA ≤ +105°C for V-Temp

Note 1: These parameters are not characterized or tested in manufacturing.
2: With no missing codes.
3: These parameters are characterized, but not tested in manufacturing.
4: Characterized with 1 kHz sinewave.

TABLE 29-34: ADC MODULE SPECIFICATIONS (CONTINUED)

AC CHARACTERISTICS

Standard Operating Conditions: 2.3V to 3.6V
(unless otherwise stated)
Operating temperature -40°C ≤ TA ≤ +85°C for Industrial
-40°C ≤ TA ≤ +105°C for V-Temp

Note 1: These parameters are not characterized or tested in manufacturing.
2: With no missing codes.
3: These parameters are characterized, but not tested in manufacturing.
4: Characterized with 1 kHz sinewave.

TABLE 29-35: 10-BIT ADC CONVERSION RATE PARAMETERS(2)

Standard Operating Conditions: 2.3V to 3.6V
(unless otherwise stated)
Operating temperature -40°C ≤TA ≤+85°C for Industrial
-40°C ≤TA ≤+105°C for V-Temp

Note 1: External VREF- and VREF+ pins must be used for correct operation.
2: These parameters are characterized, but not tested in manufacturing.

TABLE 29-36: ANALOG-TO-DIGITAL CONVERSION TIMING REQUIREMENTS

AC CHARACTERISTICS

Standard Operating Conditions: 2.3V to 3.6V
(unless otherwise stated)
Operating temperature -40°C ≤TA ≤+85°C for Industrial
-40°C ≤TA ≤+105°C for V-Temp

Note 1: These parameters are characterized, but not tested in manufacturing.
2: Because the sample caps will eventually lose charge, clock rates below 10 kHz can affect linearity performance, especially at elevated temperatures.
3: Characterized by design but not tested.

FIGURE 29-18: ANALOG-TO-DIGITAL CONVERSION (10-BIT MODE) TIMING CHARACTERISTICS (CHPS<1:0> = 01, SIMSAM = 0, ASAM = 0, SSRC<2:0> = 000)

① – Software sets ADxCON. SAMP to start sampling. ② – Sampling starts after discharge period. TSAMP is described in Section 17. “10-bit Analog-to-Digital Converter (ADC)” (DS61104) of the “PIC32 Family Reference Manual”. ③ – Software clears ADxCON. SAMP to start conversion. ④ – Sampling ends, conversion sequence starts. ⑤ – Convert bit 9. ⑥ – Convert bit 8. ⑦ – Convert bit 0. ⑧ – One TAD for end of conversion.

FIGURE 29-19: ANALOG-TO-DIGITAL CONVERSION (10-BIT MODE) TIMING CHARACTERISTICS (CHPS<1:0> = 01, SIMSAM = 0, ASAM = 1, SSRC<2:0> = 111, SAMC<4:0> = 00001)

① – Software sets ADxCON. ADON to start AD operation. ② – Sampling starts after discharge period. TSAMP is described in Section 17. “10-bit Analog-to-Digital Converter (ADC)” (DS61104) of the “PIC32 Family Reference Manual”. ③ – Convert bit 9. ④ – Convert bit 8. ⑤ – Convert bit 0. ⑥ – One TAD for end of conversion. ⑦ – Begin conversion of next channel. ⑧ – Sample for time specified by SAMC<4:0>.

DS61143H-page 184 © 2011 Microchip Technology Inc.

FIGURE 29-20: PARALLEL SLAVE PORT TIMING

TABLE 29-37: PARALLEL SLAVE PORT REQUIREMENTS

AC CHARACTERISTICS

Standard Operating Conditions: 2.3V to 3.6V (unless otherwise stated)
Operating temperature -40°C ≤TA ≤+85°C for Industrial
-40°C ≤TA ≤+105°C for V-Temp

Note 1: These parameters are characterized, but not tested in manufacturing.

FIGURE 29-21: PARALLEL MASTER PORT READ TIMING DIAGRAM

TABLE 29-38: PARALLEL MASTER PORT READ TIMING REQUIREMENTS

AC CHARACTERISTICS

Standard Operating Conditions: 2.3V to 3.6V (unless otherwise stated)
Operating temperature -40°C ≤TA ≤+85°C for Industrial
-40°C ≤TA ≤+105°C for V-Temp

Note 1: These parameters are characterized, but not tested in manufacturing.

FIGURE 29-22: PARALLEL MASTER PORT WRITE TIMING DIAGRAM

TABLE 29-39: PARALLEL MASTER PORT WRITE TIMING REQUIREMENTS

AC CHARACTERISTICS

Standard Operating Conditions: 2.3V to 3.6V (unless otherwise stated)
Operating temperature -40°C ≤TA ≤+85°C for Industrial
-40°C ≤TA ≤+105°C for V-Temp

Note 1: These parameters are characterized, but not tested in manufacturing.

TABLE 29-40: OTG ELECTRICAL SPECIFICATIONS

AC CHARACTERISTICS

Standard Operating Conditions: 2.3V to 3.6V
(unless otherwise stated)
Operating temperature -40°C ≤TA ≤+85°C for Industrial
-40°C ≤TA ≤+105°C for V-Temp

Note 1: These parameters are characterized, but not tested in manufacturing.

FIGURE 29-23: EJTAG TIMING CHARACTERISTICS

TABLE 29-41: EJTAG TIMING REQUIREMENTS

AC CHARACTERISTICS

Standard Operating Conditions: 2.3V to 3.6V (unless otherwise stated)
Operating temperature -40°C ≤ TA ≤ +85°C for Industrial
-40°C ≤ TA ≤ +105°C for V-Temp

Note 1: These parameters are characterized, but not tested in manufacturing.

NOTES:

DS61143H-page 190 © 2011 Microchip Technology Inc.