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L9374LF датащи(PDF) 63 Page - STMicroelectronics

номер детали L9374LF
подробное описание детали  Four channel valve driver
PDF  80 Pages
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производитель  STMICROELECTRONICS [STMicroelectronics]
домашняя страница  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

L9374LF датащи(HTML) 63 Page - STMicroelectronics

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L9374LF
Programmers guide
79
5.1.8
Configuration register 2 - current control / over-voltage threshold
(address 14)
Current controller / PWM enable
These two bits control the PWM or current regulation algorithm for outputs Q3 and Q4.
When disabled the output reverts to a PWM only configuration as in outputs Q1 and Q2.
Writing Not Valid bit combinations generates a SPI-data-failure and causes that specific SPI
command word to be ignored and subsequent returning Status Register data to be set to all
‘1’s.
Overload threshold Qx:
These two bits change the threshold of the overload diagnosis of channel Q1 and Q2. (See
Table 15. for values and 4.8.3: Overload for a functional description)
Writing Not Valid bit combinations generates a SPI-data-failure and causes that specific SPI
command word to be ignored and subsequent returning Status Register data to be set to all
‘1’s.
MSB
LSB
1
1
1
0
x
x
x
OV_TH_Q2
OV_TH_Q1 CCPWM_Q4 CCPWM_Q3
Parit
y
A3
A2
A1
A0
free
free
free
D7
D6
D5
D4
D3
D2
D1
D0
P
Table 52. Configuration register 2 - current control / over-voltage threshold
Configuration register
Number of bits
Bit location
Name
Current Controller / PWM Switch Q3
2 bit
D1 - D0
CCPWM_Q3
Current Controller / PWM Switch Q4
2 bit
D3 - D2
CCPWM_Q4
Overload threshold Q1
2 bit
D5 - D4
OV_TH_Q1
Overload threshold Q2
2 bit
D7 - D6
OV_TH_Q2
Table 53. Current controller off Q3 / Q4
Bit 1
Bit 0
Combination
0
0
Not Valid
0
1
Current controller enabled (PWM Control Off)
1
0
PWM Control Only (Current Control Off)
1
1
Not Valid
Table 54. Overload threshold Q1 / Q2
Bit 1
Bit 0
Combination
0
0
Not Valid
0
1
Overload threshold 1
1
0
Overload threshold 2
1
1
Not Valid



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