CM68HC05C4ACFB Motorola / Freescale Semiconductor, CM68HC05C4ACFB Datasheet - Page 79

• Manufacturer Part Number: CM68HC05C4ACFB
• Description: Microcontroller
• Manufacturer: Motorola / Freescale Semiconductor

MC68HC05C4A
MOTOROLA
—
Rev. 4.0
SCR2–SCR0 — SCI Baud Rate Select Bits
These read/write bits select the SCI baud rate, as shown in
Table
Table 9-3
frequencies of 2 MHz, 4 MHz, and 4.194304 MHz.
SCR2
Serial Communications Interface (SCI)
9-2. Reset has no effect on the SCR2–SCR0 bits.
Table 9-1. Baud Rate Generator Clock Prescaling
SCP0
000
001
010
011
100
101
110
111
–
SCR0
shows all possible SCI baud rates derived from crystal
00
01
10
11
–
SCP1
Table 9-2. Baud Rate Selection
Baud Rate Generator Clock
Internal Clock Divided by 13
Prescaled Clock Divided by 128
Internal Clock Divided by 1
Internal Clock Divided by 3
Internal Clock Divided by 4
Prescaled Clock Divided by 16
Prescaled Clock Divided by 32
Prescaled Clock Divided by 64
Prescaled Clock Divided by 1
Prescaled Clock Divided by 2
Prescaled Clock Divided by 4
Prescaled Clock Divided by 8
SCI Baud Rate (Baud)
Serial Communications Interface (SCI)
General Release Specification
SCI I/O Registers
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