MCP8021 datasheet(33/66 Pages) MICROCHIP

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DS20006265D-page 33

MCP8021/2

TABLE 4-6:

DE2 COMMUNICATION COMMANDS FROM HOST TO MCP8021/2

Command

Byte

Bit

Value

Description

SET_CFG_0

10000001 (81h)

Set Configuration Register 0

Reserved

Reserved (MCP8021)

Enable operational amplifiers in Standby mode (default) (MCP8022)

Disable operational amplifiers in Standby mode (MCP8022)

System enters Standby mode when OE = 0, SLEEP = 0 for more

than 1 ms

System enters Sleep mode when OE = 0, SLEEP = 1 for more than

1 ms

Reserved

Enable external MOSFET undervoltage lockout (default)

Disable external MOSFET undervoltage lockout

Enable external MOSFET short-circuit detection (default)

Disable external MOSFET short-circuit detection

1:0

Set external MOSFET overcurrent limit to 0.250V (default)

Set external MOSFET overcurrent limit to 0.500V

Set external MOSFET overcurrent limit to 0.750V

Set external MOSFET overcurrent limit to 1.000V

GET_CFG_0

10000010 (82h)

Get Configuration Register 0

STATUS_0

10000101 (85h)

Get Status Register 0

STATUS_1

10000110 (86h)

Get Status Register 1

SET_CFG_2

10000111 (87h)

Set Configuration Register 2

7:5

00h

Reserved

4:2

—

Driver dead time (for PWMH /PWML inputs)

000

2000 ns (default)

001

1750 ns

010

1500 ns

011

1250 ns

100

1000 ns

101

750 ns

110

500 ns

111

250 ns

1:0

—

Driver blanking time (ignore switching current spikes)

4 µs (default)

2µs

1µs

500 ns

GET_CFG_2

10001000 (88h)

Get Configuration Register 2

GET_REV_ID 1

10010000 (90h)

Get device hardware revision

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