
TABLE OF CONTENTS (Continued)
Paragraph
Page
Number
Title
Number
x
MC68322 USER’S MANUAL
MOTOROLA
Section 9
Parallel Port Interface
9.1
PPI Registers ....................................................................................... 9-2
9.1.1
Parallel Port Interface Register .................................................. 9-2
9.1.2
Parallel Port Control Register ..................................................... 9-4
9.1.3
PPI Interrupt Event Register ...................................................... 9-6
9.2
Hardware Handshaking ........................................................................ 9-8
9.2.1
Compatibility Handshaking ......................................................... 9-8
9.2.2
ECP Handshaking ...................................................................... 9-9
9.2.2.1
Command Byte Detection ............................................... 9-9
9.2.2.2
RLE Decompression...................................................... 9-10
9.2.3
Disabling Hardware Handshaking ............................................ 9-10
9.3
Software-Controlled Handshaking ..................................................... 9-11
9.4
Digital Filtering ................................................................................... 9-11
9.5
Error Cycles ....................................................................................... 9-12
9.6
Parallel Port Data Bus Latching ......................................................... 9-13
9.7
PPI on Reset ...................................................................................... 9-14
9.8
PPI Data Transfer Rate ...................................................................... 9-14
Section 10
Print Engine Interface
10.1
Print Engine Interface Registers ........................................................ 10-2
10.1.1
Printer Communication Register .............................................. 10-2
10.1.2
PVC Control Register ............................................................... 10-3
10.1.3
Printer Control Block Register Set ........................................... 10-5
10.1.4
PVC Interrupt Event Register ................................................... 10-6
10.1.5
Printer Communication Interrupt Event Register ...................... 10-8
10.2
Printer Communication Protocol ........................................................ 10-8
10.3
Print Engine Interface Operation ........................................................ 10-9
10.3.1
Synchronous/Asynchronous PVC Operation ......................... 10-10
10.3.2
Command Operation .............................................................. 10-11
10.3.2.1
CCLK Supplied By MC68322 ..................................... 10-11
10.3.2.2
CCLK Supplied By Print Engine ................................. 10-12
10.3.3
Status Operation .................................................................... 10-13
10.3.3.1
CCLK Supplied By MC68322 ..................................... 10-13
10.3.3.2
CCLK Supplied By Print Engine ................................. 10-14
10.3.4
PLL Video Clock Divisor ......................................................... 10-15
10.4
PVC On Reset .................................................................................. 10-16
10.5
PVC Video Data Timing ................................................................... 10-16
F
re
e
sc
a
le
S
e
m
ic
o
n
d
u
c
to
r,
I
Freescale Semiconductor, Inc.
For More Information On This Product,
Go to: www.freescale.com
n
c
..
.