MCP25020ISLASHP datasheet(34/66 Pages) MICROCHIP

34 / 66 page

MCP2502X/5X

DS21664D-page 34

OPTREG1 REGISTER

R/W-1

U-0

R/W-0

GPPU

CLKEN

CLKPS1

CLKPS0

—

CMREQ

AQT1

AQT0

bit 7

bit 0

bit 7

GPPU: Weak pull-up enabled

= Weak pull-ups disabled

= Weak pull-ups enabled (GP7:GP0)

bit 6

CLKEN:

= Clock Out Function disabled

= Clock Out Function enabled

bit 5-4

CLKPS1:CLKPS0: CLKOUT Prescaler bits

= FOSC/1

= FOSC/2

= FOSC/4

= FOSC/8

bit 3

Reserved:

bit 2

CMREQ: Requests mode of operation (allows mode changes via the CAN bus)

= Requests Listen-only mode

= Requests Normal mode *

* CMREQ must be cleared as default to avoid device entering Listen-only mode on first “Input”

message.

bit 1-0

AQT1:AQT0: Analog Acquisition Time bits

= 64TOSC

= 2

•(64TOSC)

= 4

•(64TOSC)

= 8

•(64TOSC)

(e.g., AQT1:AQT0 => 00 => 2.56 µs for a 25 MHz FOSC)

Legend:

R = Readable bit

W = Writable bit

U = Unimplemented bit, read as ‘0’

- n = Value at POR

‘1’ = Bit is set

‘0’ = Bit is cleared

x = Bit is unknown

MCP25020I/P Datasheet(PDF) 34 Page - Microchip Technology

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