MC9S12C128VFU Freescale Semiconductor, MC9S12C128VFU Datasheet - Page 387
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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13.3.2.1
The SCI Baud Rate Register is used by the counter to determine the baud rate of the SCI. The formula for
calculating the baud rate is:
where:
Read: Anytime. If only SCIBDH is written to, a read will not return the correct data until SCIBDL is
written to as well, following a write to SCIBDH.
Write: Anytime
Freescale Semiconductor
Module Base + 0x_0001
Module Base + 0x_0000
SBR[12:0]
Reset
Reset
Field
4–0
7–0
W
W
R
R
SCI baud rate = SCI module clock / (16 x BR)
BR is the content of the SCI baud rate registers, bits SBR12 through SBR0. The baud rate registers
can contain a value from 1 to 8191.
SBR7
SCI Baud Rate Bits — The baud rate for the SCI is determined by these 13 bits.
Note: The baud rate generator is disabled until the TE bit or the RE bit is set for the first time after reset. The
SCI Baud Rate Registers (SCIBDH and SCHBDL)
0
0
0
7
7
baud rate generator is disabled when BR = 0.
Writing to SCIBDH has no effect without writing to SCIBDL, since writing to SCIBDH puts the data in a
temporary location until SCIBDL is written to.
= Unimplemented or Reserved
Figure 13-3. SCI Baud Rate Registers (SCIBDH and SCIBDL)
SBR6
0
0
0
6
6
Table 13-1. SCIBDH AND SCIBDL Field Descriptions
SBR5
MC9S12C-Family / MC9S12GC-Family
0
0
0
5
5
Chapter 13 Serial Communications Interface (S12SCIV2) Block Description
SBR12
SBR4
Rev 01.24
0
0
4
4
Description
SBR11
SBR3
0
0
3
3
SBR10
SBR2
0
1
2
2
SBR9
SBR1
0
0
1
1
SBR8
SBR0
0
0
0
0
387
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