MM912H634DM1AER2 Freescale Semiconductor, MM912H634DM1AER2 Datasheet - Page 150

• Manufacturer Part Number: MM912H634DM1AER2
• Description: 16-bit Microcontrollers - MCU 64KS12 LIN2XLS/HS ISENSE
• Manufacturer: Freescale Semiconductor

Specifications of MM912H634DM1AER2

• Rohs: yes
• Core: HCS12
• Processor Series: MM912F634
• Data Bus Width: 16 bit
• Maximum Clock Frequency: 20 MHz
• Program Memory Size: 32 KB
• Data Ram Size: 2 KB
• On-chip Adc: Yes
• Operating Supply Voltage: 5.5 V to 18 V
• Operating Temperature Range: - 40 C to + 105 C
• Package / Case: LQFP-48
• Mounting Style: SMD/SMT
• A/d Bit Size: 10 bit
• A/d Channels Available: 15
• Interface Type: SPI
• Maximum Operating Temperature: + 105 C
• Minimum Operating Temperature: - 40 C
• Number Of Programmable I/os: 15
• Number Of Timers: 1
• Program Memory Type: Flash
• Supply Voltage - Max: 18 V
• Supply Voltage - Min: 5.5 V

Table 200. Current Sense Register (CSR)
Note:
Functional Description and Application Information
4.20
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.
4.20.1
4.20.1.1
Offset
139.
Freescale Semiconductor
Reset
.
W
R
(139)
Offset related to 0x0200 for blocking access and 0x300 for non blocking access within the global address space.
0x3C
Current Sense Module - ISENSE
Vin
Vin
Register Definition
CSE
Current Sense Register (CSR)
7
0
Imot
Imot
R
R
shunt
shunt
R
R
R
R
filt
filt
filt
filt
C
C
6
0
0
Figure 39. Current Sense Module with External Filter Option
filt
filt


Vin
Vin
0
0
5
P1
P1
P2
P2
P1
P1
0
0
4
Q
Q
Q
Q
in
in
G
G
2
2
G
G
in
in
2
2




C
C
C
C
CCD
0
3
C
C
0
2
Current Sense Module - ISENSE
Vout
Vout
CSGS
1
0
ADC
ADC
Access: User read/write
MM912F634
0
0
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