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參數(shù)資料
| 型號(hào)： | AT_8032 |
| 廠商： | Atmel Corp. |
| 英文描述： | 8-bit Embedded Microcontroller Core(8位嵌入式基于工業(yè)標(biāo)準(zhǔn)軟件兼容的微控制器) |
| 中文描述： | 8位嵌入式微控制器核心（8位嵌入式基于工業(yè)標(biāo)準(zhǔn)軟件兼容的微控制器） |
| 文件頁數(shù)： | 37/39頁 |
| 文件大?。?/td> | 532K |
| 代理商： | AT_8032 |
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AT_8032 Core
37
Notes:
1. Capture/reload occurs only on timer/counter overflow.
2. Capture/reload occurs only on timer/counter overflow and at 1-to-0 transition of T2EX (P1.1) pin except when timer 2 is used
in the baud rate generator mode.
SCON: Serial Port (UART) Control Register
Table 32.
Timer 2 as a Counter
Mode
Internal TMOD Control
(1)
External TMOD Control
(2)
16-bit
02H
0AH
Auto-reload
03H
0BH
Table 33.
Serial Port (UART) Control register
MSB
LSB
SM0
SM1
SM2
REN
TB8
RB8
TI
RI
Table 34.
Serial Port Control register Bit Functions
Symbol
Position
Function
SM0
SCON.7
Serial Port Mode specifier (see Table 35)
SM1
SCON.6
Serial Port Mode specifier (see Table 35)
SM2
SCON.5
Enables the multiprocessor communication feature in Modes 2 & 3. In Mode 2 or 3, if SM2 is set
to 1 then RI will not be activated if the 9th data bit received (RB8) is 0. In Mode 1, if SM2=1 then
RI will not be activated if a valid stop bit was not received. In Mode 0, SM2 should be 0.
REN
SCON.4
Set/cleared by software to Enable/Disable reception.
TB8
SCON.3
The 9th bit that is transmitted in Modes 2 & 3. Set/cleared by software.
RB8
SCON.2
In Modes 2 & 3, RB8 is the 9th data bit that is received. In Mode 1, if SM2 = 0, RB8 is the stop bit
that is received. In Mode 0, RB8 is not used.
TI
SCON.1
Transmit Interrupt flag. Set by hardware at the end of the 8th bit time in Mode 0, or at the
beginning of the stop bit in the other modes. Must be cleared by software.
RI
SCON.0
Receive Interrupt flag. Set by hardware at the end of the 8th bit time in Mode 0, or halfway
through the stop bit time in the other modes (except if SM2 = 1). Must be cleared by software.
Table 35.
UART Mode Selection by SM0/SM1
SM0
SM1
Mode
Description
Baud Rate
0
0
0
Shift Register
F
OSC
/12
0
1
1
8-bit UART
Variable
1
0
2
9-bit UART
F
OSC
/64 or F
OSC
/32
1
1
3
9-bit UART
Variable
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