参数资料
型号: TSS461F
厂商: Atmel Corp.
英文描述: VAN Data Link Controller
中文描述: 凡数据链路控制器
文件页数: 34/57页
文件大小: 397K
代理商: TSS461F
34
7615A–AUTO–02/06
TSS461F
RSTR: Reset Interrupt
Reset
TER: Transmit Error
Status Flag Reset
TOKR: Transmit OK
Status Flag Reset
RER: Receive Error
Status Flag Reset
ROKR: Receive “with
RAK” OK Status Flag
Reset
RNOKR: Receive “with
no RAK” OK Status Flag
Reset
One:
Status flag reset
Zero:
Status flag unchanged
Figure 21.
Update of the Status Register
Channel Registers
There is a total of 14 channel register sets, each occupying 8 bytes for addressing simplicity,
integrated into the circuit. Each set contains two 2 x 8-bit registers for the indentifier tag, indenti-
fier mask and command fields plus two 1 x 8-bit registers for DMA pointers and message status.
The base_address of each set is: (0x10 + [0x08 * channel_number]).
When the TSS461F is reset either via the external reset pin or the general reset command, the
channel registers are not affected. For example, on power-up of the circuit, all the channel regis-
ters start with random values.
Due to this fact, the user should take care to initialize all the channel registers before exiting
from idle mode. The easiest way to disable a channel register is to set the received and transmit-
ted bits to 1 in the Message Length & Status Register.
R
Line Status Register (0x04)
4 TS
S
S
4 TS
1 to 2 TS
6 TS
SOF
ID+COM+DATA+CRC
E
A
BUS
INT
Write “IT Status Register”
Write “Last Error Register”
Write “Last Message Register”
Write “Message Length & Status Register”
Write “Message Status”
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