LPC47M140-NC SMSC [SMSC Corporation], LPC47M140-NC Datasheet - Page 192

• Manufacturer Part Number: LPC47M140-NC
• Description: 128 PIN ENGANCED SUPER I/O CONTROLLER WITH AN LPC INTERFACE AND USB HUB
• Manufacturer: SMSC [SMSC Corporation]

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