UJA1061TW PHILIPS [NXP Semiconductors], UJA1061TW Datasheet - Page 37

• Manufacturer Part Number: UJA1061TW
• Description: Low speed CAN/LIN system basis chip
• Manufacturer: PHILIPS [NXP Semiconductors]

Philips Semiconductors
6.14.4
This register allows status information to be read back from the UJA1061.
Table 5 DIAG - System Diagnosis register (address 00) bit description
2004 Mar 22
10 to 7
Low speed CAN/LIN system basis chip
15, 14
6, 5
BIT
13
12
11
4
3
2
S
YSTEM DIAGNOSIS REGISTER
SYMBOL
CANFD
A1, A0
LINFD
RRS
GSD
V3D
V2D
V1D
RO
register address
Read Register Select
Read Only
Ground Shift
Diagnosis
CAN failure diagnosis
LIN failure diagnosis
V3 diagnosis
V2 diagnosis
V1 diagnosis
DESCRIPTION
VALUE
1111
1110
1101
1100
1011
1010
1001
1000
0111
0110
0101
0100
0011
0010
0001
0000
00
11
10
01
00
1
1
0
1
0
1
0
1
0
1
0
37
read system diagnosis register (DIAG)
read System Diagnosis register without writing to Mode
register
read System Diagnosis register and write to Mode register
system GND is worse than selected threshold
system GND is better than selected threshold
TXDC is clamped dominant
RXDC is clamped dominant
RXDC is clamped recessive
BUS is clamped dominant (dual failure situation)
BUS is clamped recessive (dual failure situation)
reserved
CANH is shorted to CANL (failure case 7)
CANL is shorted to V
CANL is shorted to VBAT (failure case 6)
CANH is shorted to GND (failure case 5)
CANL is shorted to GND (failure case 4)
CANH is shorted to V
CANH is shorted to VBAT (failure case 3)
CANL wire is interrupted (failure case 2)
CANH wire is interrupted (failure case 1)
no failure
TXDL is clamped dominant
LIN is shorted to GND (dominant clamped)
LIN is shorted to VBAT (recessive clamped)
no failure
OK; after a detected short-circuit; the bit is set again with
activating V3 via the V3C control bits
fail; V3 is disabled due to a short circuit situation
OK; note 1
fail; V2 is disabled due to a short-circuit situation
OK; V1 always above RAM retention threshold since last
read access
fail; V1 was below RAM retention threshold since last read
access; bit is set again with read access
CC
CC
FUNCTION
(failure case 6a)
(failure case 3a)
Objective specification
UJA1061