Table 4.9 Pin Descriptions Of Printer Port Interface - Hitachi HD64465 User Manual

Table 4.9 Pin Descriptions of Printer Port Interface
Pin No. Pin No.
(HD64465BP) (HD64465BQ) Symbol
Printer Interface
D10 A7
C10 G9
B10 B8
A10 E9
B8 E8
A8 B6
D9 A6
C9 C7
B9 B7
B7, D7-8, C8, D7, C6, F8,
D11, C11, A5, F9, C8,
B11, D12 A8, B9
Rev. 3.0, 03/01, page 32 of 390
I/O
STB# O
AFD# O
ERR# I
INIT# O
SLIN# O
ACK# I
BUSY I
PE I
SLCT I
PPD7-PPD0 IO
Description
Printer Strobe. Active low, this signal is the
complement of bit 0 of the printer control
register. It is used to strobe the printer data
into the printer
Printer Autofeed. Active low, this signal is the
complement of bit 1 of the printer control
register. This signal, when in low level, is
used to feed one line after each line is
printed when it is low.
Printer Error. Active low, indicates printer has
encountered an "ERROR" condition. It can
be read at bit 3 of printer status register
Printer Initialize. Active low, this signal is bit 2
of the printer control register, and is used to
initiate printer when it is low.
Printer Select. Select the printer when it is
low, this signal is the complement of bit 3 of
the printer control register
Printer Acknowledge. This signal goes low to
indicate that the printer has already received
a character and is ready to accept another
Printer Busy. This signal goes high when the
line printer has a local operation in process
and cannot accept data
Printer Paper End. This signal is set high by
printer when it runs out of paper
Printer Select. This signal goes high when
the line printer has been selected
Parallel Port Data Bus. This bus provides a
byte-wide input or output to the system. The
eight lines are held in a high-impedance
state when the port is not selected.