Canon BJC 50 - Color Inkjet Printer Service Manual page 49

BJC-50
9) Timing
1284 Active
(SELECT IN)
AckDataReq
(PE)
Data (1 - 8)
HostBusy
(AUTO FEED XT)
HostClk
(STROBE)
PtrClk
(ACKNLG)
PtrBusy
(BUSY)
nDataAvail
(ERROR)
XFlag
(SELECT)
1284 Active
(SELECT IN)
nAckReverse
(PE)
Data (1 - 8)
HostAck
(AUTO FEED XT)
HostClk
(STROBE)
PeriphClk
(ACKNLG)
PeriphAck
(BUSY)
nPeriphRequest
(ERROR)
XFlag
(SELECT)
nReverseRequest
(INIT)
1.0 s 1.0 s
min min
DATA 1-8
STROBE
BUSY
ACKNLG
Figure 2-12 Timing Chart (Compatibility Mode)
H
P
0000 0000
H
H
P
P
Printer status is busy
P
Nibble mode
P supporting
TP
TP
TP
Figure 2-13 Timing Chart (Nibble Mode)
H
P
H 0001 0000
P
P
P
P
P
ECP Mode Supported
P
H
TP TP
TP
TP
Figure 2-14 Timing Chart (ECP Mode)
2-19
Part 2: Product Specifications
1.0 s
min
3.5 s min.
Data bit 2 Data bit 6
Data bit 3 Data bit 7
Data bit 0 Data bit 4
Data bit 1 Data bit 5
TP
TP
Byte0 Byte1
nCmd nCmd
nPeriphRequest
TP
Not transferable
TP TP
TP: minimum setup time
Perror
Busy
Error
Select
TP
TP: minimum setup time