參數(shù)資料
型號: 37C669
廠商: 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: 電腦98/99順從超級I / O軟盤控制器與紅外線支持
文件頁數(shù): 66/164頁
文件大?。?/td> 621K
代理商: 37C669
158
compatibility problems in Compatible Mode (the
control signals, by
tradition,
are
specified
as open-collector), the drivers are dynamically
changed from open-collector to totem-pole. The
timing for the dynamic driver change is specified
in the IEEE 1284 Extended Capabilities
Port
Protocol and ISA Interface Standard, Rev. 1.09,
Jan. 7, 1993, available from Microsoft.
The
dynamic driver change must be implemented
properly to prevent glitching the outputs.
FIGURE 19 - PARALLEL PORT FIFO TIMING
t 3
t 6
t 1
t 2
t 5
t 4
PDATA
nS TROBE
BUSY
Parameter
min
max
units
t1
t2
t3
t4
t5
t6
DATA Vali d to nSTROBE Active
nSTROBE Active Pulse Width
DATA Hold from nSTROBE Inactive
n STROBE Active to BUSY Active
BUSY In active to nSTROBE Active
BUSY In active to PDATE Invalid
6 00
4 50
6 80
80
ns
5 00
Notes
1
1. The da ta i s h eld un ti l BUSY go es inactive or for ti me t3, whi ch ever is long er. Th is o nly
ap plie s i f ano th er data tra nsfer is pending. If no other data transfer is p end ing, th e data
is h eld i ndefin itely.
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