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參數資料
型號: W83877AF
廠商: WINBOND ELECTRONICS CORP
元件分類: 外設及接口
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: 117/171頁
文件大小: 1634K
代理商: W83877AF
W83877AF
Publication Release Date: Dec. 1996
Preliminary Version 0.52
- 115 -
These two bits hold the media ID bit 1, 0 for three mode
Floppy Boot Drive 1 Floppy Boot Drive 0 (bit 1, 0)
These two bits hold the value of floppy boot drive 1 and drive 0 for three mode
8.2.10 Configuration Register 9 (CR9), default = 0AH
When the device is in Extended Function mode and EFIR is 09H, the CR9 register can be accessed
through EFDR. The bit definitions are as follows:
7 6 5 4 3 2 1 0
CHIP ID0
CHIP ID1
CHIP ID2
CHIP ID3
Reserved
EN3MODE
LOCKREG
PRTMODS2
PRTMODS2 (Bit 7):
This bit and PRTMODS1, PRTMODS0 (bits 3, 2 of CR0) select the operating mode of the
W83877AF. Refer to the descriptions of CR0.
LOCKREG (Bit 6):
This bit enables or disables the reading and writing of all configuration registers.
0
Enables the reading and writing of CR0-CR29
1
Disables the reading and writing of CR0-CR29 (locks W83877AF extension functions)
EN3MODE (Bit 5):
This bit enables or disables three mode FDD selection. When this bit is high, it enables the read/write
3F3H register.
0
Disables 3 mode FDD selection
1
Enables 3 mode FDD selection
When three mode FDD function is enabled, the value of RWC depends on bit 5 and bit 4 of
TDR(3F3H). The values of RWC and their meaning are shown in Table 8-4.
Table 8-4
BIT 5 OF TDR
BIT 4 OF TDR
RWC
Normal
0
1
X
RWC = 0
250K bps
1.2 M FDD
X
X
RWC = 1
500K bps
X
1.4M FDD
X
0
0
1
1
0
1
0
1
Bit 4: Reserved.
CHIP ID 3, CHIP ID 2, CHIP ID 1, CHIP ID 0 (Bit 3-0):
相關PDF資料
PDF描述
W83877ATD enhanced version from Winbonds most popular I/O chip W83877F
W83877ATF enhanced version from Winbonds most popular I/O chip W83877F
W83877 WINBOND I/O
W83877F WINBOND I/O
W83877TD I/O chip disk drive adapter
相關代理商/技術參數
參數描述
W83877ATD 制造商:WINBOND 制造商全稱:Winbond 功能描述:enhanced version from Winbonds most popular I/O chip W83877F
W83877ATF 制造商:WINBOND 制造商全稱:Winbond 功能描述:enhanced version from Winbonds most popular I/O chip W83877F
W83877F 制造商:WINBOND 制造商全稱:Winbond 功能描述:WINBOND I/O
W83877TD 制造商:WINBOND 制造商全稱:Winbond 功能描述:WINBOND I/O
W83877TF 制造商:WINBOND 制造商全稱:Winbond 功能描述:WINBOND I/O