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This register is used to read back the overtemperature status for the V1 and V2 regulators. In write mode, it is used to turn V2
on after a V2 over temperature shutdown has occurred.
BIT 7
BIT 6
BIT 5
BIT 4
BIT 3
BIT 2
BIT 1
OTV2
OTV2C
0
BIT 0
OTV1
R
OPWV2
OPWV1
OTSR
$012
W
RESET
0
0
0
OTV1: 1=V1 overtemperature shutdown, 0=V1 no overtemperature
OTV2: 1=V2 overtemperature shutdown, 0=V2 no overtemperature
OPWV1: 1=V1 overtemperature pre-warning, 0=V1 normal temperature
OPWV2: 1=V2 overtemperature pre-warning, 0=V2 normal temperature
In case of V1 or V2 overtemperature the appropriate voltage regulators are switched off automatically and the
overtemperature flags are set (latched). The flags can be reseted by a read operation of the register OTSR.
Once V2 has been switched off because of overtemp (OTV2=1) it can only be switched on again by forcing OTV2C=0 by a
write operation.
The V1 and V2 pre-warning flags are set as long as the first overtemperature exists. The flags disappear, when the
temperature is below the threshold. An overtemperature of the V2 power supply will also switch off V3. After a power on reset all
bits of the register are set to 0.
Table 46. TESRH — Transceiver Error Status Register For CANH
Register used to report the CAN H failure status
.
BIT 7
BIT 6
BIT 5
BIT 4
BIT 3
BIT 2
BIT 1
BIT 0
R
TESRH3
TESRH2
TESRH1
TESRH0
TESRH
$014
W
RESET
0
0
0
0
Table 47.
TESRH3
TESRH2
TESRH1
TESRH0
0
0
X
0
1
0
X
X
1
0
0
1
0
0
0
1
No failure on CANH
CANH wire interruption
CANH short circuited to Vbat
CANH short circuited to ground
CANH short circuited to VCC
X
X
X
X
In case of CANH line failures, the appropriate bit(s) are set according to table 46. This information is latched. The register
can be reseted by a read operation. After power on reset, all bits are set to 0.
Table 48. TESRL — Transceiver Error Status Register For CANL And Tx
Register used to report the CANL and Tx permanent dominant failure status
.
BIT 7
BIT 6
BIT 5
BIT 4
BIT 3
BIT 2
BIT 1
BIT 0
R
TESRL3
TESRL2
TESRL1
TESRL0
TESRL
$017
W
RESET
0
0
0
0
For More Information On This Product,
MC33389
MOTOROLA
27
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