参数资料
型号: MC68HC11C0MFN2
厂商: MOTOROLA INC
元件分类: 微控制器/微处理器
英文描述: 8-BIT, 2 MHz, MICROCONTROLLER, PQCC68
封装: PLASTIC, LCC-68
文件页数: 60/76页
文件大小: 394K
代理商: MC68HC11C0MFN2
MC68HC11C0
MOTOROLA
MC68HC11C0TS/D
63
Figure 13 SCI Baud Generator Circuit Diagram
TCLR — Clear Baud Rate Counters
TCLR can only be set in test modes.
1 = Clear baud rate counter chain for testing purposes.
0 = Normal SCI operation
SCP[1:0] — SCI Baud Rate Prescaler Selects
Shaded boxes contain the prescaler rates used in the following table. Refer to the SCI Baud Rate Clock
Diagram.
BAUD — Baud Rate Control Register
$002B
Bit 7
654321
Bit 0
TCLR
SCP1
SCP0
RCKB
SCR2
SCR1
SCR0
RESET:
00000
U
SCI BAUD GENERATOR
÷3
÷4
÷13
OSCILLATOR
AND
CLOCK GENERATOR
(
÷4)
XTAL
EXTAL
E
AS
INTERNAL BUS CLOCK (PH2)
1:1
SCP[1:0]
1:0
0:1
0:0
÷2
0:0:0
÷2
0:0:1
÷2
0:1:0
÷2
0:1:1
÷2
1:0:0
÷2
1:0:1
÷2
1:1:0
1:1:1
÷16
SCI
RECEIVE
BAUD RATE
(16X)
SCR[2:0]
SCI
TRANSMIT
BAUD RATE
(1X)
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