Instruction manual

27
FEATURES &
FUNCTIONS
PRECAUTIONS
SPECIAL
FEATURES &
UNPACKING
CONNECTIONS
BEFORE
OPERATION
TROUBLE-
SHOOTING
CLEANING
OTHERS
• Parallel input connector port Signal allocation (Signal : ECP)
Pin No.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
16•17
18
19 - 30
31
32
15•
33 - 35
36
Return pin No.
19
20
21
22
23
24
25
26
27
28
29
16
Signal
HostClk
DATA1 (LSB)
DATA2
DATA3
DATA4
DATA5
DATA6
DATA7
DATA8 (MSB)
PeriphClk
PeriphAck
AckReverse
Xflag
HostAck
GND
High
GND
Reverse Request
Periph Request
NC
1284 Active
From/To
PC/VCP
PC/VCP
PC/VCP
PC/VCP
PC/VCP
PC/VCP
PC/VCP
PC/VCP
PC/VCP
PC/VCP
PC/VCP
PC/VCP
PC/VCP
PC/VCP
PC/VCP
PC/VCP
PC/VCP
PC/VCP
PC/VCP
Function
Forward data transfer : Becomes “Low” when PeriphAck is “Low”
and there is data to be read. Returns to “High” when PeriphACK
becomes “High”.
High: data 1
Low: data 0
Information will be expressed for parallel data of every signal from
bit No.1 to No.8.
Reverse data transfer : Sends “Low” data when HostAck is “Low”.
Returns to “High” when HostAck becomes “High”.
Forward data transfer :
High : VCP is on BUSY status.
Low : VCP can accept data.
High: Forward data transfer (Receive)
Low : Reverse data transfer (Send)
High : During supporting ECP mode
Reverse data transfer :
High : PC is on BUSY status.
Low : PC can send data.
Earth
PeripheralLogicHigh
Earth
Low : When PC requests VCP to send data
Low : When VCP requests PC to send data
Unused
Becomes “High” when VCP requests each mode of IEEE1284.