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參數(shù)資料
| 型號： | 935230900112 |
| 廠商： | NXP SEMICONDUCTORS |
| 元件分類： | 微控制器/微處理器 |
| 英文描述： | 2 CHANNEL(S), 1M bps, LOCAL AREA NETWORK CONTROLLER, PDIP28 |
| 封裝： | 0.600 INCH, PLASTIC, DIP-28 |
| 文件頁數(shù)： | 7/68頁 |
| 文件大?。?/td> | 234K |
| 代理商： | 935230900112 |
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2000 Jan 04
15
Philips Semiconductors
Product specication
Stand-alone CAN controller
SJA1000
6.3.5
STATUS REGISTER (SR)
The content of the status register reflects the status of the SJA1000. The status register appears to the microcontroller
as a read only memory.
Table 5
Bit interpretation of the status register (SR); CAN address 2
BIT
SYMBOL
NAME
VALUE
FUNCTION
SR.7
BS
Bus Status; note 1
1
bus-off; the SJA1000 is not involved in bus
activities
0
bus-on; the SJA1000 is involved in bus activities
SR.6
ES
Error Status; note 2
1
error; at least one of the error counters has
reached or exceeded the CPU warning limit
0
ok; both error counters are below the warning limit
SR.5
TS
Transmit Status; note 3
1
transmit; the SJA1000 is transmitting a message
0
idle; no transmit message is in progress
SR.4
RS
Receive Status; note 3
1
receive; the SJA1000 is receiving a message
0
idle; no receive message is in progress
SR.3
TCS
Transmission Complete
Status; note 4
1
complete; the last requested transmission has
been successfully completed
0
incomplete; the previously requested transmission
is not yet completed
SR.2
TBS
Transmit Buffer Status;
note 5
1
released; the CPU may write a message into the
transmit buffer
0
locked; the CPU cannot access the transmit
buffer; a message is waiting for transmission or is
already in process
SR.1
DOS
Data Overrun Status;
note 6
1
overrun; a message was lost because there was
not enough space for that message in the RXFIFO
0
absent; no data overrun has occurred since the
last clear data overrun command was given
SR.0
RBS
Receive Buffer Status;
note 7
1
full; one or more messages are available in the
RXFIFO
0
empty; no message is available
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相關代理商/技術參數(shù) |
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|---|---|
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