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參數(shù)資料
型號: W90210F
廠商: WINBOND ELECTRONICS CORP
元件分類: 微控制器/微處理器
英文描述: PA-RISC Embedded Micro-Controller(惠普PA-RISC結構的32位嵌入式微控制器)
中文描述: 32-BIT, MROM, RISC MICROCONTROLLER, PQFP208
封裝: PLASTIC, QFP-208
文件頁數(shù): 33/67頁
文件大小: 297K
代理商: W90210F
W90210F
33
Version 1.4, 10/8/97
The above information is the exclusive intellectual property of Winbond Electronics Corp. and shall not be disclosed, distributed or reproduced without permssion fromWinbond.
8.4 Serial I/O
The serial I/O megacell implements a full-duplex, bi-directional UART with FIFO.
Serial I/O megacell
Peripheral
Interface
SIN
SOUT
Control Register
Status Register
OSC
Input Shift Reg.
Output Shift
Reg.
Input Buffer.
Output Buffer
Control Logic
Timing generator
Figure 8.8 Serial I/O with FIFO
8.4.1 UART Register Definition
Description
- Receiver Buffer Register.
- Read only.
- bit 7 is LSB.
- Transmitter Holding Register.
- Write only.
- bit 7 is LSB.
- Interrupt Enable Register.
0
3F8, DLAB = 0
RBR[0:7]
0
3F8, DLAB = 0
THR[0:7]
1
3F9, DLAB = 0
IER[3:7]
* bit 7: Irpt_RDA enable (1/0- Enable/Disable).
* bit 6: Irpt_THRE enable (1/0- Enable/Disable).
* bit 5: Irpt_RLS enable (1/0- Enable/Disable).
* bit 4: Irpt_MOS enable (1/0- Enable/Disable).
- bit 3: Loop-back enable (1/0- Enable/Disable).
* Divisor Latch Register (LS).
* Divisor Latch Register (MS).
- Interrupt Ident. Register.
- Read only.
0
1
2
3F8, DLAB = 1
3F9, DLAB = 1
3FA
DLL[0:7]
DLM[0:7]
IIR[0:7]
* bit 7: No Irpt pending (1/0- True/False).
* bit 6: Irpt ID bit (2).
* bit 5: Irpt ID bit (1).
* bit 4: Irpt ID bit (0).
- bit 3: DMA mode select (1/0- Mode 1/Mode 0).
- bit 2: RCVR trigger (LSB).
- bit 1: RCVR trigger (MSB).
- bit 0: FIFO mode enable (1/0- Enable/Disable).
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