MC9S12C128VFU Freescale Semiconductor, MC9S12C128VFU Datasheet - Page 396
MC9S12C128VFU
Manufacturer Part Number
MC9S12C128VFU
Description
Manufacturer
Freescale Semiconductor
Datasheet
1.MC9S12C128VFU.pdf
(690 pages)
Specifications of MC9S12C128VFU
Cpu Family
HCS12
Device Core Size
16b
Frequency (max)
25MHz
Interface Type
CAN/SCI/SPI
Program Memory Type
Flash
Program Memory Size
128KB
Total Internal Ram Size
4KB
# I/os (max)
60
Number Of Timers - General Purpose
8
Operating Supply Voltage (typ)
2.5/5V
Operating Supply Voltage (max)
2.75/5.5V
Operating Supply Voltage (min)
2.35/2.97V
On-chip Adc
8-chx10-bit
Instruction Set Architecture
CISC
Operating Temp Range
-40C to 105C
Operating Temperature Classification
Industrial
Mounting
Surface Mount
Pin Count
80
Package Type
PQFP
Lead Free Status / Rohs Status
Not Compliant
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Chapter 13 Serial Communications Interface (S12SCIV2) Block Description
13.4.2
A 13-bit modulus counter in the baud rate generator derives the baud rate for both the receiver and the
transmitter. The value from 0 to 8191 written to the SBR12–SBR0 bits determines the module clock
divisor. The SBR bits are in the SCI baud rate registers (SCIBDH and SCIBDL). The baud rate clock is
synchronized with the bus clock and drives the receiver. The baud rate clock divided by 16 drives the
transmitter. The receiver has an acquisition rate of 16 samples per bit time.
Baud rate generation is subject to one source of error:
Table 13-10
SCI baud rate = SCI module clock / (16 * SCIBR[12:0])
396
Integer division of the module clock may not give the exact target frequency.
Baud Rate Generation
lists some examples of achieving target baud rates with a module clock frequency of 25 MHz
SBR[12-0]
1302
2604
5208
Bits
163
326
651
41
81
Table 13-10. Baud Rates (Example: Module Clock = 25 MHz)
Clock (Hz)
609,756.1
308,642.0
153,374.2
Receiver
76,687.1
38,402.5
19,201.2
9600.6
4800.0
MC9S12C-Family / MC9S12GC-Family
Rev 01.24
Transmitter
Clock (Hz)
38,109.8
19,290.1
9585.9
4792.9
2400.2
1200.1
600.0
300.0
Target Baud
38,400
19,200
9600
4800
2400
1200
Rate
600
300
Error
(%)
.76
.47
.16
.15
.01
.01
.00
.00
Freescale Semiconductor
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