Freescale Semiconductor, Inc.
SECTION 2
SIGNAL DESCRIPTIONS
This section contains brief descriptions of the MC68340 input and output signals in their
functional groups as shown in Figure 2-1.
A31/PORT A7/IACK7
A30/PORT A6/IACK6
A29/PORT A5/IACK5
A28/PORT A4/IACK4
PORT A
A27/PORT A3/IACK3
A26/PORT A2/IACK2
A25/PORT A1/IACK1
A24/PORT A0
RxDA
TxDA
CTSA
RxDB
TxDB
CTSB
TWO-CHANNEL
SERIAL
CPU32
CORE
I/O
TEST
A23–A0
D15–D0
FC3–FC0
RESET
BERR
HALT
AS
TxRDYA/OP6
RxRDYA/FFULLA/OP4
RTSB/OP1
EXTERNAL
BUS
OUTPUT
PORT
RTSA/OP0
INTERFACE
SYSTEM
INTEGRATION
MODULE
DS
IMB
R/W
SIZ1
SIZ0
DSACK1
DSACK0
BR
BG
BUS
BGACK
ARBITRATION
RMC
CLOCK
TWO-CHANNEL
DMA
CONTROLLER
TIMER
MODULE
TIMER
MODULE
IRQ7/PORT B7
IRQ6/PORT B6
IRQ5/PORT B5
IRQ3/PORT B3
CS3/IRQ4/PORT B4
CS2/IRQ2/PORT B2
CS1/IRQ1/PORT B1
PORT B
CS0/AVEC
MODCK/PORT B0
Figure 2-1. Functional Signal Groups
MOTOROLA
MC68340 USER’S MANUAL
2- 1
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