l99h01 STMicroelectronics, l99h01 Datasheet - Page 39

• Manufacturer Part Number: l99h01
• Description: Motor Bridge Driver For Automotive Applications
• Manufacturer: STMicroelectronics

L99H01
4.6
4.6.1
Detailed byte description of application registers (ApplRegX)
The write/read operation starts always with a command byte followed by 1 data byte.
Description of the data byte
The device uses 3 application registers to configure the device. Note that the last row shows
the logic levels during a reset phase.
Table 33.
Comments:
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Table 34.
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Table 35.
<default>
Name
Bit
DIAG[1]
RWD: Restarts the watchdog counter
FW_PAS: Enables passive free wheeling according to
OFF_CAL: Offset calibration mode for CSA
OVT: Overvoltage threshold
CLK_SPCTR: Switch the clock to the charge pump
–
–
OV_UV_RD: Over-/undervoltage recovery disabled. If this bit is set the microcontroller
has to clear the status register after any under-/overvoltage event to enable the gate
drivers.
DIAG[1:0]: Drain source monitoring threshold voltage
0
0
1
1
0: 125 Khz (50% duty cycle)
1: pulses train (max = 8 µs, min = 2 µs) to optimize power spectrum
RWD
Address 1 <01(hex)>:ApplReg1-read/write
Overvoltage threshold of the Vs monitoring
DIAG monitoring of source voltages
7
0
FW_PAS
DIAG[0]
OVT
6
0
0
1
0
1
0
1
OFF_CAL
Doc ID 15567 Rev 3
5
0
CLK_SPCTR
4
0
Monitoring threshold voltage
V
V
OVT
V
V
SCD3
SCD1
3
0
SCD2
SCD4
Table 23
= 0.5 V
= 1.5 V
OV_UV_ RD
= 1 V
= 2 V
Threshold
2
0
20 V
29 V
DIAG1
1
0
DIAG0
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0
0