FDC37C672QFP SMSC Corporation, FDC37C672QFP Datasheet - Page 167

• Manufacturer Part Number: FDC37C672QFP
• Description: ENHANCED SUPER I/O CONTROLLER WITH FAST IR
• Manufacturer: SMSC Corporation

Enhanced Super I/O Controller with Fast IR
Datasheet
Note 22.4 Maximum value only applies if there is room in the FIFO and terminal count has not been received. ECP
Note 22.5 nACK is not considered asserted or deasserted until it is stable for a minimum of 75 to 130 ns.
SMSC FDC37C672
NAME
t1
t2
t3
t4
t5
t6
PDATA<7:0>
can stall by keeping nAUTOFD low.
nAUTOFD
PDATA Valid to nACK Asserted
nAUTOFD Deasserted to PDATA Changed
nACK Asserted to nAUTOFD Deasserted
(Note 22.4, Note 22.5)
nACK Deasserted to nAUTOFD Asserted (Note 22.5)
nAUTOFD Asserted to nACK Asserted
nAUTOFD Deasserted to nACK Deasserted
nACK
Figure 22.3 - ECP Parallel Port Reverse Timing
DESCRIPTION
t4
DATASHEET
t1
t5
Page 167
t3
t6
MIN
t4
80
80
0
0
0
0
t2
TYP
MAX
200
200
Rev. 10-29-03
UNITS
ns
ns
ns
ns
ns
ns