MC68322 View Datasheet(PDF) - Motorola => Freescale
Part Name
Description
Manufacturer
MC68322 Datasheet PDF : 12 Pages
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Freescale Semiconductor, Inc.
Signal Name
Mnemonic
Address Bus
A25–A1
Address Strobe
AS
Auto Feed Control
AUTOFD
Bus Grant
BG
Bus Request
BR
Chip Select
CS7–CS0
Clock
CLK2
Column Address Strobe CAS1, CAS0
Command Busy
CBSY
Command Clock
CCLK
Command/Status Data CMD /STS
Data Bus
D15–D0
DMA Acknowledge
DACK
DMA Request
DREQ
DRAM Address Bus MA10–MA0
DRAM Data Bus
MD15–MD0
External Master DTACK EDTACK
Frame Sync
FSYNC
Initialization Input
INIT
Interrupt Request
IRQ1, IRQ0
Line Sync
LSYNC
PPI Data Bus
PD7–PD0
Print Request
PRINT
Printer Busy
BUSY
Printer Data Strobe
STROBE
Printer Error
FAULT
Printer Paper Path Error PERROR
Printer Select
SELECTIN
Printer Selected
SELECT
Read Enable
RD
Read/Write
R/ W
Reset
RESET
Row Address Strobe RAS5–RAS0
Status Busy
SBSY
Status Data
STS
Table 1. Signal Index
Function
25-bit external address bus.
Indicates a valid address is on the bus.
Parallel port control signal.
Asserted to grant bus mastership to an external device.
Asserted by an external device to request bus master ship.
PROM and I/O chip selects.
2× system clock.
DRAM column address strobes.
Command busy indicates that a command will be sent to the printer.
Command clock is the command/status clock to/from the printer.
Command/status data is the synchronous communications and data out to
the printer, or the bidirectional command/status data to or from the printer.
16-bit data bus used for byte or word transfers.
Output that indicates data transfer is complete.
Input that starts a DMA transfer.
Multiplexed DRAM address bus.
16-bit DRAM data bus.
External master support signal.
Indicates the top of the page in response to a print request.
Parallel port initialize control.
Interrupt request input.
Indicates the left edge of the page.
Parallel port interface bidirectional data bus.
Print request requests a page to be printed.
Parallel port printer busy.
Parallel port signal that latches incoming data.
Parallel port printer error.
Parallel port paper error.
Parallel port request for "on-line" status.
Printer "on-line".
PROM and I/O read enable strobe.
Identifies the transfer as a read or write.
Processor reset.
DRAM row address strobe.
Indicates a status wants to be received from the printer.
Status data is the synchronous status data from the printer.
MOTOROLA
MC68322 PRODUCT INFORMATION
5
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