MC912DT128ACPV Freescale Semiconductor, MC912DT128ACPV Datasheet - Page 280

• Manufacturer Part Number: MC912DT128ACPV
• Description: IC 8MHZ 16 BIT MICROCONTROLLER
• Manufacturer: Freescale Semiconductor
• Series: HC12r

Specifications of MC912DT128ACPV

• Core Processor: CPU12
• Core Size: 16-Bit
• Speed: 8MHz
• Connectivity: CAN, I²C, SCI, SPI
• Peripherals: POR, PWM, WDT
• Number Of I /o: 67
• Program Memory Size: 128KB (128K x 8)
• Program Memory Type: FLASH
• Eeprom Size: 2K x 8
• Ram Size: 8K x 8
• Voltage - Supply (vcc/vdd): 4.5 V ~ 5.5 V
• Data Converters: A/D 16x8/10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 112-LQFP
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Other names: KMC912DT128ACPV; Q1195202

Multiple Serial Interface
16.4.1 Data Format
16.4.2 SCI Baud Rate Generation
Technical Data
280
The serial data format requires the following conditions:
The basis of the SCI baud rate generator is a 13-bit modulus counter.
This counter gives the generator the flexibility necessary to achieve a
reasonable level of independence from the CPU operating frequency
and still be able to produce standard baud rates with a minimal amount
of error. The clock source for the generator comes from the M Clock.
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Freescale Semiconductor, Inc.
For More Information On This Product,
An idle-line in the high state before transmission or reception of a
message.
A start bit (logic zero), transmitted or received, that indicates the
start of each character.
Data that is transmitted or received least significant bit (LSB) first.
A stop bit (logic one), used to indicate the end of a frame. (A frame
consists of a start bit, a character of eight or nine data bits and a
stop bit.)
A BREAK is defined as the transmission or reception of a logic
zero for one frame or more.
This SCI supports hardware parity for transmit and receive.
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SCI Baud Rate
Multiple Serial Interface
Desired
14400
19200
38400
Table 16-1. Baud Rate Generation
1200
2400
4800
9600
110
300
600
BR Divisor for
M = 4.0 MHz
2273
833
417
208
104
52
26
17
13
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MC68HC912DT128A — Rev 4.0
BR Divisor for
M = 8.0 MHz
4545
2273
833
417
208
104
52
35
26
13
MOTOROLA