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12. Parallel Interface
The two-way parallel interface is compatible with the IEEE1284 compatibility mode and nibble mode.
12-1.Table of Connection Signals for Each Mode
Pin No.
Direction
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
In
In
In
In
In
In
In
In
In
Out
Out
Out
Out
In
Out
Compatibility Mode
Signal Name
nStorobe
Data0
Data1
Data2
Data3
Data4
Data5
Data6
Data7
nAck
Busy
PError
Select
nAutoFd
N/C
GND
Flame GND
Logic High
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
– 48 –
Nibble Mode
Signal Name
HostClk
Data0
Data1
Data2
Data3
Data4
Data5
Data6
Data7
PtrClk
PtrBusy/Data3,7
AckDataReq/Data2,6
Xflag/Data1,5
HostBusy
—
GND
Flame GND
Logic High
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND