MC9S12C128VFU Freescale Semiconductor, MC9S12C128VFU Datasheet - Page 387

MC9S12C128VFU

Manufacturer Part Number
MC9S12C128VFU
Description
Manufacturer
Freescale Semiconductor
Datasheet

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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