STR720 datasheet(222/401 Pages) STMICROELECTRONICS

部件名	STR720

功能描述	ARM720T 16/32-BIT MCU WITH 16K RAM, USB, CAN, 3 TIMERS, ADC, 6 COMMUNICATIONS INTERFACES

PDF	401 Pages

Scroll/Zoom	100%

制造商	STMICROELECTRONICS [STMicroelectronics]

网页	http://www.st.com

标志

222 / 401 page

STR720 - CONTROLLER AREA NETWORK (CAN)

222/401

Bits 6:0

These bits of IFn Command Mask Register have different functions

depending on the transfer direction:

Direction = Write

Bit 6 = Mask Access Mask Bits

0: Mask bits unchanged.

1: transfer Identifier Mask + MDir + MXtd to Message Object.

Bit 5 = Arb Access Arbitration Bits

0: Arbitration bits unchanged.

1: Transfer Identifier + Dir + Xtd + MsgVal to Message Object.

Bit 4 = Control Access Control Bits

0: Control Bits unchanged.

1: Transfer Control Bits to Message Object.

Bit 3 = ClrIntPnd Clear Interrupt Pending Bit

When writing to a Message Object, this bit is ignored.

Bit 2 = TxRqst/NewDat Access Transmission Request Bit

0: TxRqst bit unchanged.

1: Set TxRqst bit.

If a transmission is requested by programming bit TxRqst/NewDat in the IFn

Command Mask Register, bit TxRqst in the IFn Message Control Register

will be ignored.

Bit 1 = Data A Access Data Bytes 3:0

0: Data Bytes 3:0 unchanged.

1: Transfer Data Bytes 3:0 to Message Object.

Bit 0 = Data B Access Data Bytes 7:4

0: Data Bytes 7:4 unchanged.

1: Transfer Data Bytes 7:4 to Message Object.

STR720 数据表(PDF) 222 Page - STMicroelectronics