LPC47S457-NC SMSC [SMSC Corporation], LPC47S457-NC Datasheet - Page 241

• Manufacturer Part Number: LPC47S457-NC
• Description: Advanced I/O with X-Bus Interface
• 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 LPC47S45x
NAME
PDATA<7:0>
stall by keeping nAUTOFD low.
t1
t2
t3
t4
t5
t6
nAUTOFD
nACK
PDATA Valid to nACK Asserted
nAUTOFD Deasserted to PDATA Changed
nACK Asserted to nAUTOFD Deasserted
(Notes 1,2)
nACK Deasserted to nAUTOFD Asserted (Note 2)
nAUTOFD Asserted to nACK Asserted
nAUTOFD Deasserted to nACK Deasserted
FIGURE 32 − ECP PARALLEL PORT REVERSE TIMING
DESCRIPTION
t4
DATASHEET
t1
t5
Page 241 of 259
t3
t6
MIN
80
80
0
0
0
0
t4
TYP
t2
MAX
200
200
UNITS
ns
ns
ns
ns
ns
ns
Rev. 06-01-06