4 can 0 transmit-error register (c0te) -31 – Maxim Integrated MAXQ7666 User Manual
Page 161
MAXQ7665/MAXQ7666 User’s Guide
4-31
2. ERI = 1 and/or ETI = 1 Only (STIE = 0: Hardwired Method) with No Prior Interrupt Active
4.2.4.4 CAN 0 Transmit-Error Register (C0TE)
Register Description:
CAN 0 Transmit-Error Register
Register Name:
C0TE
Register Address:
Module 04h, Index 03h
Bits 15 to 8: Reserved. Read 0, write ignored.
Bits 7 to 0: CAN 0 Transmit-Error Register 7 to 0 (C0TE.7 to C0TE.0). This register indicates the number of accumulated CAN 0
transmit errors. The CAN 0 module responds in different ways to varying number of errors as shown in the following table. This regis-
ter can only be modified by software when SWINT = 1 and BUSOFF = 0. All software writes to this register simultaneously load the
same value into the CAN 0 transmit error register and the CAN 0 receive error register. Writing 00h to this register also clears the CAN
0 error-count-exceeded bit, CECE (C0S.6). This register is cleared following all hardware resets and software resets enabled by the
CRST bit in the CAN 0 control register.
CASE
ERIE
RECEPTION
SUCCESSFUL?
INTIN VECTOR
INTRQ
CAN 0 INT
A
0
No
Value A or 0
0
Inactive
B
0
Yes
Value A or 0
0
Inactive
C
1
No
Value A or 0
0
Inactive
D
1
Yes
Value A or
(MCV > INTIN)
1
Active
C0TE VALUE
CAN 0 STATE
Value < 96
Error Active Mode, CAN 0 Bus On (BUSOFF = 0)
128 > Value
≥ 96
Error Active Mode, CAN 0 Bus On (BUSOFF = 0),
Warning Level
255
≥ Value ≥ 128
Error Passive Mode, CAN 0 Bus On (BUSOFF = 0)
Value > 255
CAN 0 Bus Off (BUSOFF = 1)
Bit #
15
14
13
12
11
10
9
8
Name
— — — — — — — —
Reset
0 0 0 0 0 0 0 0
Access r*
r*
r*
r*
r*
r*
r*
r*
Bit #
7
6
5
4
3
2
1
0
Name
C0TE.7 C0TE.6 C0TE.5 C0TE.4 C0TE.3 C0TE.2 C0TE.1 C0TE.0
Reset
0 0 0 0 0 0 0 0
Access r*
r*
r*
r*
r*
r*
r*
r*
r = read, * = write only when SWINT = 1 and BUSOFF = 0
Maxim Integrated