l9929xp STMicroelectronics, l9929xp Datasheet - Page 14

• Manufacturer Part Number: l9929xp
• Description: Spi Controlled H-bridge
• Manufacturer: STMicroelectronics

L9929
5.6
On the following conditions DIA_REG is reset:
Verification byte:
5.7
Description of the SPI Registers
14/23
– With the rising edge of the SS-signal after the SPI-Instruction RD_DIA (only if error free while SS,
– When the voltage on DMS exceeds the threshold for detecting SPI-Mode. (after undervoltage condi-
– - If VS rises over about the undervoltage level, the Bits of DIA_REG are restored (when VS internal
MSB
Register:
Active
State of Reset: FFH
Access by Controller:
new errors will actualize DIA_REG with the rising edge of SS).
tion or after power up)
or DMS > 3,1V)
Reset of the Diagnostic Register DIA_REG
Diagnostics/Encoding of Failures
7
Z
7
Bit
Bit
0
1
2
3
4
5
6
7
0
1
2
3
4
5
6
7
DIA_REG
OT
6
Z
6
CurrRed
CurrLim
TRANS_F
DIA 10
DIA 11
DIA 20
DIA 21
Name
Active
OT
Name
Read only
CurrRed
5
1
5
(SPI Instructions: RD_DIA)
Diagnosis-Bit1 of OUT1
Diagnosis-Bit2 of OUT1
Diagnosis-Bit1 of OUT2
Diagnosis-Bit2 of OUT2
Is set to „0“ in case of current limitation
Is set to „0“ in case of temperature dependet current limitation
Is set to „0“ in case of overtemperature
Shows the wired-or state of the Pins EN and DI
Bit = 1: error detected during previous transfer
Bit = 0: previous transfer was recognised as valid
Fixed to High
Fixed to Low
Fixed to High
Fixed to Low
Fixed to High
Send as high impedance
Send as high impedance
CurrLim
4
0
4
DIA21
3
1
3
Description
Description
DIA20
2
0
2
Dia11
1
1
1
TRANS_F
DIA10
0
0