mm908e625 Freescale Semiconductor, Inc, mm908e625 Datasheet - Page 36

• Manufacturer Part Number: mm908e625
• Description: Integrated Quad Half H-bridge With Power Supply, Embedded Mcu, And Lin Serial Communication
• Manufacturer: Freescale Semiconductor, Inc

of the H-Bridges. Reset clears the CSA bit.
according to
36
H-Bridges Current Sense Amplification Select Bit (CSA)
H-Bridge Current Limitation Selection Bits (CLS2:CLS0)
Table 10. H-Bridge Current Limitation Value Selection
908E625
FUNCTIONAL DEVICE OPERATION
LOGIC COMMANDS AND REGISTERS
CLS2
This read/write bit selects the current sense amplification
• 1 = Current sense amplification set for measuring 0.5 A.
• 0 = Current sense amplification set for measuring 2.5 A.
These read/write bits select the current limitation value
0
0
0
0
1
1
1
1
CLS1
Bits
0
0
1
1
0
0
1
1
Table
Control
CLS0
10. Reset clears the CLS2:CLS0 bits.
0
1
0
1
0
1
0
1
Current
On/Off
Status
Limit
Current Limit
260 mA (typ)
370 mA (typ)
550 mA (typ)
740 mA (typ)
55 mA (typ)
No Limit
Overcurrent Protection,
Figure 21. High-Side Circuitry
Inrush Current Limiter
High-Side Driver
Charge Pump,
HIGH-SIDE DRIVER
targeted for driving lamps. The high side is protected against
overtemperature. To limit the high inrush current of bulbs,
overcurrent protection circuitry is used to limit the current.
The output is enabled with bit PSON in the System Control
Register and can be switched on/off with bit HS_ON in the
Power Output Register.
switch circuitry and connection to external lamp.
HIGH-SIDE OVERVOLTAGE/UNDERVOLTAGE
PROTECTION
undervoltage/overvoltage conditions. This protection is done
by the low- and high-voltage interrupt circuitry. If one of these
flags (LVF, HVF) is set, the output is disabled.
and the output re-enabled by writing a Logic [1] to the LVF/
this flag is useless as long as a high- or low-voltage condition
is present.
HVF flags in the Interrupt Flag Register or by reset. Clearing
The high-side output is a low-resistive high-side switch
The high-side output pin, HS, is protected against
The overvoltage/undervoltage status flags are cleared
VSUP
Analog Integrated Circuit Device Data
Figure 21
HS
depicts the high-side
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