MCP37231 datasheet(28/144 Pages) MICROCHIP

28 / 144 page

MCP37231/21-200 AND MCP37D31/21-200

DS20005322D-page 28

 2014-2016 Microchip Technology Inc.

FIGURE 2-7:

POR-Related Events: Register Initialization and Power-Up Calibration.

FIGURE 2-8:

RESET Pin Timing Diagram.

FIGURE 2-9:

Sync Timing Diagram with Power-On Reset.

AVDD12

Power-on Reset (POR)

227 cycles

(TPCAL)

Power-Up calibration complete.

• Registers are initialized

• Device is ready for correct conversion

RESET Pin

tRESET

Stop ADC conversion

and ADC recalibration

Power-Up Calibration Time

Start register initialization

(TPCAL)

Recalibration complete:

• CAL Pin: High

• ADC_CAL_STAT = 1

POR (Power-On Reset)

(~ 220 clock cycles)

SYNC Output

CAL Pin (Output)

Data Output

Clock Input

Valid Data

A. Master Device

Toggle to High at the 2nd rising edge of Clock Input

TPCAL

SYNC Input

CAL Pin (Output)

Data Output

Clock Input

B. Slave Device(s)

TPCAL

(SLAVE Pin = 1)

(SLAVE Pin = 0)

Valid Data

Invalid Data

TSYNC_OUT

MCP37231 Datasheet(PDF) 28 Page - Microchip Technology

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