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L9374LF Datasheet(PDF) 60 Page - STMicroelectronics

Part # L9374LF
Description  Four channel valve driver
PDF  80 Pages
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

L9374LF Datasheet(HTML) 60 Page - STMicroelectronics

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Programmers guide
L9374LF
60/80
DocID025414 Rev 1
Edge shaping (EDGE_SH)
Edge Shaping option allows the user to incorporate a slower more EMI sensitive slope to
the output waveform. By setting these bits the user is able to turn on / off edge shaping for
all outputs (see Section 3.3.4: Output timing characteristics). There is no option to select
individual outputs for edge shaping. When performing the SVDT it is recommended that
Edge Shaping be turned OFF.
Writing Not Valid bit combinations generates a SPI-data-failure and causes that specific SPI
command to be ignored and subsequent returning Status Register data to be set to all ‘1’s.
5.1.4
Fast switch-on (FSON) register (address 3)
If the fast switch on enable bit (FSON_EN) is set, writing 1 to the bit ONX switches the
output on 100%. A ‘0’ written to the fast switch on enable pin will disable this function. Any
outputs on as a result of an ONx bit being high will be turned off.
The fast switch off all bits (FSOFF_ALL) turn off all channels immediately (it does not
depend on the synchronization) and clear all bits at this address. The fast switch off all
(FSOFF_ALL) command has the highest priority.
Table 46. Edge shaping
Bit 1
Bit 0
Combination
0
0
Not Valid
0
1
Edge Shaping ON for all outputs
1
0
Edge Shaping OFF for all outputs
1
1
Not Valid
MSB
LSB
0
0
1
1
xxxxxxx
ON4
ON3
ON2
ON1
Parit
y
A3
A2
A1
A0
free free free free free free free
D3
D2
D1
D0
P
Table 47. Fast switch-on
Configuration register
Bit Location
Name
Switch on Q1
D0
ON1
Switch on Q2
D1
ON2
Switch on Q3
D2
ON3
Switch on Q4
D3
ON4



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