at7601fg AME, Inc., at7601fg Datasheet - Page 5

• Manufacturer Part Number: at7601fg
• Description: Printer Port Controller
• Manufacturer: AME, Inc.

Rev. B.02
AT7601F
Note 1: These registers are in all mode
Note 2: These registers are in EPP mode
Note 3: For EPP mode, IOCHRDY must be connect to the ISA BUS
5-2 Enhanced Parallel Port(EPP)
SPP Name
PD[0:7]
BUSY
SLIN#
ACK#
ERR#
STB#
SLCT
INIT#
AFD
A2
PE
0
0
0
0
1
1
1
1
AME, Inc.
EPP Name
DataSTB#
AddrSTB#
PD [0: 7]
Write#
Select
Error#
Wait#
INIT#
INTR
PE
A1
0
0
1
1
0
0
1
1
Table 6. EPP Pin Descriptions
I/O Type
Table 5. EPP Pin Descriptions
I/O
O
O
O
O
A0
I
I
I
I
I
0
1
0
1
0
1
0
1
Active low; It indicates a write operation.
Bi-directional EPP byte wide address and data bus.
Interrupt, Active high; Peripheral generates an interrupt to
the host.
Active low; it is handshake signal. When low, it indicates
that the device is ready for next transfer, when high, it
indicates that the data transfer is complete.
Paper End; Same as SPP mode.
Printer selected status; Same as SPP mode.
Data Strobe ; Active low; it indicates a data read or write
operation.
Error; Same as SPP mode.
Active low; The EPP device is reset to its initial operating
mode.
Address Strobe ; Active low; It indicates an address read
or write operation.
Data Port
Printer Status Port
Printer Control Port
EPP Address Port
EPP Data Port 0
EPP Data Port 1
EPP Data Port 2
EPP Data Port 3
Register
EPP Description
Printer Port Controller
Note
2,3
2,3
2,3
2,3
2,3
1
1
1
5