MM912H634CV1AE Freescale Semiconductor, MM912H634CV1AE Datasheet - Page 141

• Manufacturer Part Number: MM912H634CV1AE
• Description: 64KS12 LIN2xLS/HS Isense
• Manufacturer: Freescale Semiconductor
• Series: -r

Specifications of MM912H634CV1AE

• Applications: Automotive
• Core Processor: HCS12
• Program Memory Type: FLASH (64 kB)
• Controller Series: HCS12
• Ram Size: 6K x 8
• Interface: LIN
• Number Of I /o: -
• Voltage - Supply: 5.5 V ~ 27 V
• Operating Temperature: -40°C ~ 105°C
• Mounting Type: Surface Mount
• Package / Case: 48-LQFP Exposed Pad
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

4.21
The Current Sense Module is implemented to amplify the voltage drop across an external shunt resistor to
measure the actual application current using the internal Analog Digital Converter Channel 9. Typical application
is the motor current in a window lift control module
The implementation is based on a switched capacitor solution to eliminate unwanted offset.To fit several application scenarios,
eight different GAIN setting are implemented.
4.21.1
4.21.1.1
Freescale Semiconductor
Offset
Note:
134.
.
Reset
W
R
Vin
Vin
(134)
Offset related to 0x0200 for blocking access and 0x300 for non blocking access within the global address space.
0x3C
Current Sense Module - ISENSE
Imot
Imot
Register Definition
R
R
CSE
Current Sense Register (CSR)
shunt
shunt
7
0
R
R
R
R
filt
filt
filt
filt
C
C
filt
filt


Figure 37. Current Sense Module with External Filter Option
6
0
0
Vin
Vin
P1
P1
P2
P2
P1
P1
Table 210. Current Sense Register (CSR)
MM912_634 Advance Information, Rev. 4.0
5
0
0
Q
Q
Q
Q
in
in
G
G
2
2
in
in
G
G
2
2


4
0
0


C
C
C
C
CCD
C
C
3
0
Vout
Vout
2
0
Current Sense Module - ISENSE
ADC
ADC
CSGS
1
0
Access: User read/write
MCU
0
0
ANALOG
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