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參數資料
型號: W83877TF
廠商: WINBOND ELECTRONICS CORP
元件分類: 外設及接口
英文描述: Multi-Function I/O Port Controller(用于個人計算機的多功能輸入/輸出口控制器)
中文描述: MULTIFUNCTION PERIPHERAL, PQFP100
封裝: QFP-100
文件頁數: 119/154頁
文件大小: 821K
代理商: W83877TF
W83877TF
Publication Release Date: March 1998
- 93 -
Version 0.61
8.2.25 Configuration Register 19 (CR19), default=00H
When the device is in Extended Function mode and EFIR is 19H, the CR19 register can be accessed
through EFDR. The bit definitions are as follows:
1
2
3
4
5
6
7
0
FASTB
FASTA
reserved
reserved
reserved
reserved
reserved
reserved
This register is used for the high speed modem application. While the bit is set to logic 1 it can make
the baudrate of UART up to 921.2KBPS (the clock source of UART is 14.769MHz) for high speed
transmit/receive.
Bit 7 - bit 2: Reserved.
FASTA (Bit 1):
0
the clock source of UART A is the same as the frequency of TURA (CR0C bit 7)
and SUAMIDI (CR3 bit 1) selected.
1
the clock source of UART A is 14.769MHZ.
FASTB (Bit 0):
0
the clock source of UART B is the same as the frequency of TURB (CR0C bit 6)
and SUBMIDI (CR3 bit 0) selected.
1
the clock source of UART B is 14.769MHZ.
8.2.26 Configuration Register 20 (CR20)
When the device is in Extended Function mode and EFIR is 20H, the CR20 register can be accessed
through EFDR. Default = FCH if CR16 bit 2 = 1; default = 00H if CR16 bit 2 = 0. The bit definitions
are as follows:
1
2
3
4
5
6
7
0
reserved
reserved
FDCAD2
FDCAD3
FDCAD4
FDCAD5
FDCAD6
FDCAD7
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