upd70f3402 Renesas Electronics Corporation., upd70f3402 Datasheet - Page 601

• Manufacturer Part Number: upd70f3402
• Description: 32-/16-bit Single-chip Microcontroller With Can Interface
• Manufacturer: Renesas Electronics Corporation.

(8)
CnINFO
RECS1
TECS1
CAN module information register (CnINFO)
The CnINFO register indicates the status of the CAN module.
BOFF
0
1
0
0
1
1
0
0
1
1
Not bus-off state (transmit error counter £ 255). (The value of the transmit counter is less than
256.)
Bus-off state (transmit error counter > 255). (The value of the transmit counter is 256 or more.)
RECS0
TECS0
Figure 16-30: CAN Module Information Register (CnINFO) Format
7
0
0
1
0
1
0
1
0
1
The value of the transmission error counter is less than that of the warning level
(< 96).
The value of the transmission error counter is in the range of the warning level
(96 to 127).
undefined
The value of the transmission error counter is in the range of the error passive or bus-
off state (≥ 128).
The value of the reception error counter is less than that of the warning level (< 96).
The value of the reception error counter is in the range of the warning level
(96 to 127).
undefined
The value of the reception error counter is in the error passive range (≥ 128).
6
0
User’s Manual U16702EE3V2UD00
5
0
Chapter 16 FCAN Controller
BOFF
4
Transmission error counter status bit
Reception error counter status bit
TECS1 TECS0 RECS1 RECS0
Bus-off status bit
3
2
1
0
see Table
Address R/W After reset
16-16
R/W
00H
601