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LPC47M14X Datasheet(PDF) 192 Page - SMSC Corporation

Part # LPC47M14X
Description  128 PIN ENGANCED SUPER I/O CONTROLLER WITH AN LPC INTERFACE AND USB HUB
PDF  205 Pages
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Manufacturer  SMSC [SMSC Corporation]
Direct Link  http://www.smsc.com
Logo SMSC - SMSC Corporation

LPC47M14X Datasheet(HTML) 192 Page - SMSC Corporation

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SMSC DS – LPC47M14X
Page 192
Rev. 03/19/2001
t2
t1
t5
t6
t4
t3
t4
PD<7:0>
nACK
nALF
FIGURE 34 – ECP PARALLEL PORT REVERSE TIMING
NAME
DESCRIPTION
MIN
TYP
MAX
UNITS
t1
PDATA Valid to nACK Asserted
0
ns
t2
nALF Deasserted to PDATA Changed
0
ns
t3
nACK Asserted to nALF Deasserted
(Notes 1,2)
80
200
ns
t4
nACK Deasserted to nALF Asserted (Note 2)
80
200
ns
t5
nALF Asserted to nACK Asserted
0
ns
t6
nALF Deasserted to nACK Deasserted
0
ns
Note 1: Maximum value only applies if there is room in the FIFO and terminal count has not been received. ECP can
stall by keeping nALF low.
Note 2: nACK is not considered asserted or deasserted until it is stable for a minimum of 75 to 130 ns.



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