参数资料
型号: 37C669
厂商: SMSC Corporation
英文描述: DIODE SCHOTTKY SINGLE 25V 200mW 0.5V-vf 200mA-IFM 30mA-IF 2uA-IR SOD-323 3K/REEL
中文描述: 电脑98/99顺从超级I / O软盘控制器与红外线支持
文件页数: 90/164页
文件大小: 621K
代理商: 37C669
31
DIGITAL INPUT REGISTER (DIR)
Address 3F7 READ ONLY
This register is read-only in all modes.
PC-AT Mode
BIT 0 - 6 UNDEFINED
The data bus outputs D0 - 6 will remain in a
high impedance state during a read of this
register.
BIT 7 DSKCHG
This bit monitors the pin of the same name and
reflects the opposite value seen on the disk
cable.
PS/2 Mode
BIT 0 nHIGH DENS
This bit is low whenever the 500 Kbps or 1 Mbps
data rates are selected, and high when 250
Kbps and 300 Kbps are selected.
BITS 1 - 2 DATA RATE SELECT
These bits control the data rate of the floppy
controller.
See Table 13 for the settings
corresponding to the individual data rates. The
data rate select bits are
unaffected
by
a
software reset, and are set to 250 Kbps after a
hardware reset.
BITS 3 - 6 UNDEFINED
Always read as a logic "1"
BIT 7 DSKCHG
This bit monitors the pin of the same name and
reflects the opposite value seen on the disk
cable.
7
6
5
4
3
2
1
0
DSK
CHG
RESET
COND.
N/A
7
6
5
4
3
2
1
0
DSK
CHG
1
DRATE
SEL1
DRATE
SEL0
HIGH
DENS
RESET
COND.
N/A
1
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37C672 制造商:SMSC 制造商全称:SMSC 功能描述:ENHANCED SUPER I/O CONTROLLER WITH FAST IR
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37C-6BH-5-5 制造商:Birtcher Products 功能描述:
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