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參數(shù)資料
型號(hào): W83877AF
廠商: WINBOND ELECTRONICS CORP
元件分類: 外設(shè)及接口
英文描述: Multi-Function I/O Port Controller(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(shù): 131/171頁
文件大小: 1634K
代理商: W83877AF
W83877AF
Publication Release Date: Dec. 1996
Preliminary Version 0.52
- 129 -
1
2
3
4
5
6
7
0
DSUBLGRQ
DSUALGRQ
DSPRLGRQ
DSFDLGRQ
PRIRQOD
Reserved
Reserved
Reserved
Bit 7-bit 5: Reserved.
PRIRQOD (bit4):
0
1
printer IRQ ports are totem-poles in SPP mode and open-drains in ECP/EPP mode.
printer IRQ ports are totem-poles in all modes.
DSFDLGRQ (bit 3):
0
enable FDC legacy mode on IRQ and DRQ selections. DO register bit 3 has effect on
selecting IRQ.
disable FDC legacy mode on IRQ and DRQ selections. DO register bit 3 has no effect
on selecting IRQ.
1
DSPRLGRQ (bit 2):
0
enable PRT legacy mode on IRQ and DRQ selections. DCR bit 4 has effect on
selecting IRQ.
disable PRT legacy mode on IRQ and DRQ selections. DCR bit 4 has no effect on
selecting IRQ.
1
DSUALGRQ (bit 1):
0
1
enable UART A legacy mode on IRQ selection. MCR bit 3 has effect on selecting IRQ.
disable UART A legacy mode on IRQ selection. MCR bit 3 has no effect on selecting
IRQ.
DSUBLGRQ (bit 0):
0
1
enable UART B legacy mode on IRQ selection. MCR bit 3 has effect on selecting IRQ.
disable UART B legacy mode on IRQ selection. MCR bit 3 has no effect on selecting
IRQ.
8.2.24 Configuration Register 1E (CR1E)
When the device is in Extended Function mode and EFIR is 1EH, the CR1E register can be accessed
through EFDR. Default = 81H if CR16 bit 2 = 1; default = 00H if CR16 bit 2 = 0. The bit definitions
are as follows:
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