mm908e626 Freescale Semiconductor, Inc, mm908e626 Datasheet - Page 27

• Manufacturer Part Number: mm908e626
• Description: Integrated Stepper Motor Driver With Embedded Mcu And Lin Serial Communication
• Manufacturer: Freescale Semiconductor, Inc

CSA — H-Bridges Current Sense Amplification Select Bit
of the H-Bridges. Reset clears the CSA bit.
CLS2 : CLS0 — H-Bridge Current Limitation Selection Bits
according to
Switchable VDD Outputs
can be used for driving external circuitry that requires a V
voltage. The output is enabled with bit PSON in the System
Control Register and can be switched on / off with bit
HVDDON in the Power Output Register. Low- or high-voltage
conditions (LVI / HVI) have no influence on this circuitry.
HVDD Overtemperature Protection
temperature reset is enabled.
HVDD Overcurrent Protection
event the overcurrent limit is or was reached, the output
automatically switches off and the HVDD overcurrent flag in
the System Status Register is set.
Analog Integrated Circuit Device Data
Freescale Semiconductor
Table 5. H-Bridge Current Limitation Value Selection
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
The HVDD terminal is a switchable VDD output terminal. It
Overtemperature protection is enabled if the high-
The HVDD output is protected against overcurrent. In the
0
0
0
0
1
1
1
1
CLS1
Table
0
0
1
1
0
0
1
1
5. Reset clears the CLS2 : CLS0 bits.
CLS0
0
1
0
1
0
1
0
1
Bits
Current Limit
260 mA (typ)
370 mA (typ)
550 mA (typ)
740 mA (typ)
55 mA (typ)
No Limit
DD
System Control Register (SYSCTL)
PSON — Power Stages On Bit
LIN transmitter and HVDD output). Reset clears the PSON
bit.
SRS0 : SRS1 — LIN Slew Rate Selection Bits
appropriate LIN slew rate for different baud rate
configurations as shown in
programming via the LIN and are not intended for use in the
application.
Table 6. LIN Slew Rate Selection Bits
System Status Register (SYSSTAT)
LINCL — LIN Current Limitation Bit
current limitation region. Due to excessive power dissipation
in the transmitter, software is advised to turn the transmitter
off immediately.
Notes
Reset
Reset
Read
Read
Write
Write
15.
This read / write bit enables the power stages (half-bridges,
• 1 = Power stages enabled.
• 0 = Power stages disabled.
These read / write bits enable the user to select the
The high speed slew rates are used, for example, for
SRS1
This read-only bit is set if the LIN transmitter operates in
• 1 = Transmitter operating in current limitation region.
• 0 = Transmitter not operating in current limitation
0
0
1
1
region.
This bit must always be set to 0.
PSON
Bit 7
Bit 7
Register Name and Address: SYSSTAT - $0c
Register Name and Address: SYSCTL - $03
0
0
0
SRS0
LINCL
SRS1
0
1
0
1
6
0
6
0
HVDD
_OCF
SRS0
5
0
LOGIC COMMANDS AND REGISTERS
5
0
FUNCTIONAL DEVICE OPERATION
Table
Initial Slew Rate (20 kBaud)
Slow Slew Rate (10 kBaud)
4
0
0
4
0
0
High Speed II (8 x)
High Speed I (4 x)
6.
LIN Slew Rate
LVF
3
0
0
3
0
HVF
2
0
0
2
0
1
0
0
OCF
HB_
1
0
908E626
Bit 0
(14)
0
0
Bit 0
HTF
0
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