參數資料
型號： MC68HC11D0CFN2
廠商： FREESCALE SEMICONDUCTOR INC
元件分類： 微控制器/微處理器
英文描述： 8-BIT, 2 MHz, MICROCONTROLLER, PQCC44
封裝： PLASTIC, LCC-44
文件頁數： 110/138頁
文件大?。?/td> 1047K
代理商： MC68HC11D0CFN2
SCI Registers
MC68HC711D3 Data Sheet, Rev. 2.1
Freescale Semiconductor
73
SCP1 and SCP0 — SCI Baud Rate Prescaler Select Bits
These two bits select a prescale factor for the SCI baud rate generator that determines the highest
possible baud rate.
SCR2–SCR0 — SCI Baud Rate Select Bits
These three bits select receiver and transmitter bit rate based on output from baud rate prescaler
stage.
The prescale bits, SCP1 and SCP0, determine the highest baud rate and the SCR2–SCR0 bits select
an additional binary submultiple (
÷1, ÷2, ÷4, through ÷128) of this highest baud rate. The result of these
two dividers in series is the 16 X receiver baud rate clock. The SCR2–SCR0 bits are not affected by
reset and can be changed at any time, although they should not be changed when any SCI transfer is
in progress.
Figure 6-8 illustrates the SCI baud rate timing chain. The prescale select bits determine the highest
baud rate. The rate select bits determine additional divide by two stages to arrive at the receiver timing
(RT) clock rate. The baud rate clock is the result of dividing the RT clock by 16.
Table 6-1. Baud Rate Prescale Selects
SCP1
and SCP0
Divide
Internal Clock
By
Crystal Frequency in MHz
4.0 MHz
(Baud)
8.0 MHz
(Baud)
10.0 MHz
(Baud)
12.0 MHz
(Baud)
0 0
1
62.50 K
125.0 K
156.25 K
187.5 K
0 1
3
20.83 K
41.67 K
52.08 K
62.5 K
1 0
4
15.625 K
31.25 K
38.4 K
46.88 K
1 1
13
4800
9600
12.02 K
14.42 K
Table 6-2. Baud Rate Selects
SCR2–SCR0
Divide
Prescaler
By
Highest Baud Rate
(Prescaler Output from Table 6-1)
4800
9600
38.4 K
0 0 0
1
4800
9600
38.4 K
0 0 1
2
2400
4800
19.2 K
0 1 0
4
1200
2400
9600
0 1 1
8
600
1200
4800
1 0 0
16
300
600
2400
1 0 1
32
150
300
1200
1 1 0
64
—
150
600
1 1 1
128
—
300
相關PDF資料
PDF描述
MC68HC11D0CFB2 8-BIT, 2 MHz, MICROCONTROLLER, PQFP44
MC68HC11D3CFN2 8-BIT, MROM, 2 MHz, MICROCONTROLLER, PQCC44
MC68HC711D3CP3 8-BIT, OTPROM, 3 MHz, MICROCONTROLLER, PDIP40
MC68HC11D3CFN3 8-BIT, MROM, 3 MHz, MICROCONTROLLER, PQCC44
MC68HC11D3CFB1 8-BIT, MROM, 3 MHz, MICROCONTROLLER, PQFP44
相關代理商/技術參數
參數描述
MC68HC11D0CFN3 制造商: 功能描述: 制造商:undefined 功能描述:
MC68HC11D0CFNE2 功能描述:8位微控制器 -MCU 8B MCU 192 BYTES RAM RoHS:否 制造商:Silicon Labs 核心:8051 處理器系列:C8051F39x 數據總線寬度:8 bit 最大時鐘頻率:50 MHz 程序存儲器大小:16 KB 數據 RAM 大小:1 KB 片上 ADC:Yes 工作電源電壓:1.8 V to 3.6 V 工作溫度范圍:- 40 C to + 105 C 封裝 / 箱體:QFN-20 安裝風格:SMD/SMT
MC68HC11D0CFNE2R 功能描述:8位微控制器 -MCU 8B MCU 192 BYTES RAM RoHS:否 制造商:Silicon Labs 核心:8051 處理器系列:C8051F39x 數據總線寬度:8 bit 最大時鐘頻率:50 MHz 程序存儲器大小:16 KB 數據 RAM 大小:1 KB 片上 ADC:Yes 工作電源電壓:1.8 V to 3.6 V 工作溫度范圍:- 40 C to + 105 C 封裝 / 箱體:QFN-20 安裝風格:SMD/SMT
MC68HC11D0CFNE3 功能描述:8位微控制器 -MCU 8B MCU 192 BYTES RAM RoHS:否 制造商:Silicon Labs 核心:8051 處理器系列:C8051F39x 數據總線寬度:8 bit 最大時鐘頻率:50 MHz 程序存儲器大小:16 KB 數據 RAM 大小:1 KB 片上 ADC:Yes 工作電源電壓:1.8 V to 3.6 V 工作溫度范圍:- 40 C to + 105 C 封裝 / 箱體:QFN-20 安裝風格:SMD/SMT
MC68HC11D0CFNE3R 功能描述:8位微控制器 -MCU 8B MCU 192 BYTES RAM RoHS:否 制造商:Silicon Labs 核心:8051 處理器系列:C8051F39x 數據總線寬度:8 bit 最大時鐘頻率:50 MHz 程序存儲器大小:16 KB 數據 RAM 大小:1 KB 片上 ADC:Yes 工作電源電壓:1.8 V to 3.6 V 工作溫度范圍:- 40 C to + 105 C 封裝 / 箱體:QFN-20 安裝風格:SMD/SMT
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