參數(shù)資料
型號: MC68HC11KA4TS
廠商: Motorola, Inc.
英文描述: KPT 3C 3#16 PIN PLUG
中文描述: 8位微控制器
文件頁數(shù): 40/68頁
文件大?。?/td> 365K
代理商: MC68HC11KA4TS
MOTOROLA
40
MC68HC11KA4
MC68HC11KA4TS/D
BTST — Baud Register Test (TEST)
BSPL — Baud Rate Counter Split (TEST)
Bit 5 — Not implemented
Always reads zero
SBR[12:0] — SCI Baud Rate Selects
Use the following formula to calculate SCI baud rate. Refer to the table of baud rate control values for
example rates:
SCI baud rate = EXTAL
÷
[16 (2 BR)]
Where BR is the contents of SCBDH, L (BR = 1, 2, 3, ..., 8191).
BR = 0 disables the baud rate generator.
LOOPS — SCI LOOP Mode Enable
0 = SCI transmit and receive operate normally
1 = SCI transmit and receive are disconnected from TxD and RxD pins, and transmitter output is
fed back into the receiver input
SCBDH/L
—SCI Baud Rate Control High/Low
$0070, $0071
Bit 7
BTST
0
SBR7
0
6
5
0
4
3
2
1
Bit 0
SBR8
0
SBR0
0
$0070
RESET:
$0071
RESET:
BSPL
0
SBR6
0
SBR12
0
SBR4
0
SBR11
0
SBR3
0
SBR10
0
SBR2
1
SBR9
0
SBR1
0
High
SBR5
0
Low
Table 7 SCI Baud Rate Control Values
Target
Baud
Rate
110
150
300
600
1200
2400
4800
9600
19.2 K
38.4 K
Crystal Frequency (EXTAL)
12 MHz
Dec Value
3409
2500
1250
625
312
156
78
39
20
8 MHz
16 MHz
Dec Value
2272
1666
833
416
208
104
52
26
13
Hex Value
$08E0
$0682
$0341
$01A0
$00D0
$0068
$0034
$001A
$000D
Hex Value
$0D51
$09C4
$04E2
$0271
$0138
$009C
$004E
$0027
$0014
Dec Value
4545
3333
1666
833
416
208
104
52
26
13
Hex Value
$11C1
$0D05
$0682
$0341
$01A0
$00D0
$0068
$0034
$001A
$000D
SCCR1
—SCI Control 1
$0072
Bit 7
6
5
4
3
2
1
Bit 0
LOOPS
WOMS
M
WAKE
ILT
PE
PT
RESET:
0
0
0
0
0
0
0
0
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