MC9S12E128CPV Freescale Semiconductor, MC9S12E128CPV Datasheet - Page 261
MC9S12E128CPV
Manufacturer Part Number
MC9S12E128CPV
Description
Microcontrollers (MCU) 16 Bit 16MHz
Manufacturer
Freescale Semiconductor
Datasheet
1.MC9S12E128CPV.pdf
(606 pages)
Specifications of MC9S12E128CPV
Data Bus Width
16 bit
Program Memory Type
Flash
Program Memory Size
128 KB
Data Ram Size
8 KB
Interface Type
SCI, SPI
Maximum Clock Frequency
25 MHz
Number Of Programmable I/os
92
Number Of Timers
16 bit
Operating Supply Voltage
3.135 V to 5.5 V
Maximum Operating Temperature
+ 85 C
Mounting Style
SMD/SMT
Package / Case
LQFP-112
Minimum Operating Temperature
- 40 C
On-chip Adc
10 bit
On-chip Dac
8 bit, 2 Channel
Lead Free Status / Rohs Status
No RoHS Version Available
Available stocks
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Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
MC9S12E128CPVE
Manufacturer:
Freescale Semiconductor
Quantity:
10 000
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8.4.3
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 SBR[12:0] 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 8-13
When IREN = 0 then,
Freescale Semiconductor
•
Integer division of the module clock may not give the exact target frequency.
SCI baud rate = SCI module clock / (16 * SCIBR[12:0])
lists some examples of achieving target baud rates with a module clock frequency of 10.2 MHz.
Baud Rate Generation
SBR[12–0]
Table 8-13. Baud Rates (Example: Module Clock = 10.2 MHz)
1062
2125
4250
5795
Bits
133
266
531
17
33
66
Clock (Hz)
600,000.0
309,090.9
154,545.5
Receiver
76,691.7
38,345.9
19,209.0
9604.5
4800.0
2400.0
1760.1
MC9S12E128 Data Sheet, Rev. 1.07
Transmitter
Clock (Hz)
37,500.0
19,318.2
9659.1
4793.2
2396.6
1200.6
600.3
300.0
150.0
110.0
Target Baud
Chapter 8 Serial Communication Interface (SCIV3)
38,400
19,200
Rate
9600
4800
2400
1200
600
300
150
110
Error
(%)
2.3
.62
.62
.14
.14
.11
.05
.00
.00
.00
261
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