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参数资料
| 型号： | TSC87C52-12IGD |
| 厂商： | ATMEL CORP |
| 元件分类： | 微控制器/微处理器 |
| 英文描述： | 8-BIT, OTPROM, 12 MHz, MICROCONTROLLER, CDIP40 |
| 封装： | 0.600 INCH, CERAMIC, DIP-40 |
| 文件页数： | 23/24页 |
| 文件大小： | 181K |
| 代理商： | TSC87C52-12IGD |
TSC87C52
8
Rev. D – December 14, 1998
When in mode 2 and 3 (9–bit mode), RI flag is set during stop bit if framing error is enabled or during ninth bit if not
(see Figure 5).
RI
TI
RB8
TB8
REN
SM2
SM1
SM0/FE
IDL
PD
GF0
GF1
POF
–
SMOD0
SMOD1
To UART framing error control
SM0 to UART mode control
Set FE bit if stop bit is 0 (framing error)
Figure 3 Framing error block diagram
Data byte
RI
SMOD0=X
Stop
bit
Start
bit
RXD
D7
D6
D5
D4
D3
D2
D1
D0
FE
SMOD0=1
Figure 4 Enhanced UART timing diagram in mode 1
RI
SMOD0=0
Data byte
Ninth
bit
Stop
bit
Start
bit
RXD
D8
D7
D6
D5
D4
D3
D2
D1
D0
RI
SMOD0=1
FE
SMOD0=1
Figure 5 Enhanced UART timing diagram in mode 2 and 3
Table 4 SCON – Serial Control Register (98h)
765432
10
SM0/FE
SM1
SM2
REN
TB8
RB8
TI
RI
Symbol
Description
FE
SM0
Framing Error bit (SMOD0 bit set)
Set by hardware when an invalid stop bit is detected.
Clear to reset the error state, not cleared by a valid stop bit.
Serial Mode bit 0 (SMOD0 bit cleared)
Used with SM1 to select serial mode.
SM1
Serial Mode bit 1
Used with SM0 to select serial mode.
SM2
Multiprocessor Communication Enable bit
Set to enable multiprocessor communication feature in mode 2 and 3.
Clear to disable multiprocessor communication feature.
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