ST72521 datasheet(140/211 Pages) STMICROELECTRONICS

Part #	ST72521

Description	8-BIT MCU WITH NESTED INTERRUPTS, FLASH, 10-BIT ADC, FIVE TIMERS, SPI, SCI, I2C, CAN INTERFACE

PDF	211 Pages

Scroll/Zoom	100%

Manufacturer	STMICROELECTRONICS [STMicroelectronics]

Direct Link	http://www.st.com

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ST72521

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CONTROLLER AREA NETWORK (Cont’d)

FILTER HIGH REGISTERS (FHRx)

Read/Write

Reset Value: Undefined

FIL[11:3] are the most significant 8 bits of a 12-bit

message filter. The acceptance filter is compared

bit by bit with the identifier and the RTR bit of the

incoming message. If there is a match for the set

of bits specified by the acceptance mask then the

message is stored in a receive buffer.

FILTER LOW REGISTERS (FLRx)

Read/Write

Reset Value: Undefined

FIL[3:0] are the least significant 4 bits of a 12-bit

message filter.

MASK HIGH REGISTERS (MHRx)

Read/Write

Reset Value: Undefined

MSK[11:3] are the most significant 8 bits of a 12-

bit message mask. The acceptance mask defines

which bits of the acceptance filter should match

the identifier and the RTR bit of the incoming mes-

sage.

MSKi = 0: don’t care.

MSKi = 1: match required.

MASK LOW REGISTERS (MLRx)

Read/Write

Reset Value: Undefined

MSK[3:0] are the least significant 4 bits of a 12-bit

message mask.

FIL11

FIL10

FIL9

FIL8

FIL7

FIL6

FIL5

FlL4

FIL3

FIL2

FIL1

FIL0

MSK1

MSK9

MSK8

MSK7

MSK6

MSK5

MSK4

MSK3

MSK2

MSK1

MSK0

0000

ST72521 Datasheet(PDF) 140 Page - STMicroelectronics

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