參數(shù)資料
型號: MSM9225BGA-2K
廠商: OKI ELECTRIC INDUSTRY CO LTD
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, PQFP44
封裝: PLASTIC, QFP-44
文件頁數(shù): 48/95頁
文件大?。?/td> 567K
代理商: MSM9225BGA-2K
MSM9225B User’s Manual
Chapter 2 Register Descriptions
2 – 39
2.4.13 Transmit Error Counter (TEC: AEhex)
TEC is a register to indicate the Transmit Error Counter value. This register is read-only.
At reset or when in the bus off state, TEC is set to “0000 0000”.
The bit configuration is shown below.
MSB
TEC7
TEC6
TEC5
TEC4
TEC3
TEC2
TEC1
TEC0
LSB
TEC (AEhex), R/W: R
Initial
value:
000
00
Figure 2-37 Transmit Error Counter (TEC)
Figure 2-38 shows the relation between the Transmit Error Counter and the bus off flag (BOFF).
Bit 8 of the transmit error counter, which consists of 9 bits, indicates the BOFF value of the CAN status register
(CANS: 9Fhex); bit 7 indicates the TEP value of CANS.
7
1
BOFF
Bus off state
6
0
1
543210
Transmit Error
Counter
TEC (AEhex)
Error active state
Error passive state
CANS (9Fhex): bit 6 = BOFF, bit 5 = TEP
Figure 2-38 Relation between the Transmit Error Counter and the Bus OFF flag
2.4.14 Receive Error Counter (REC: AFhex)
REC is a register to indicate the Receive Error Counter value. This register is read-only.
At reset or when in the bus off state, REC is set to “0000 0000”.
Bit 7 of the Receive Error Counter indicates the value of REP bit of the CAN status register (CANS: 9Fhex).
The bit configuration is shown below.
MSB
REC7
REC6
REC5
REC4
REC3
REC2
REC1
REC0
LSB
REC (AFhex), R/W: R
Initial
value:
000
00
Figure 2-39 Receive Error Counter (REC)
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