MC68020 Motorola, MC68020 Datasheet - Page 36

• Manufacturer Part Number: MC68020
• Description: (MC68020 / MC68EC020) MICROPROCESSORS USERS MANUAL
• Manufacturer: Motorola

SECTION 3
SIGNAL DESCRIPTION
This section contains brief descriptions of the input and output signals in their functional
groups, as shown in Figure 3-1. Each signal is explained in a brief paragraph with
reference to other sections that contain more detail about the signal and the related
operations.
MOTOROLA
EMULATOR SUPPORT
In this section and in the remainder of the manual, assert and
negate are used to specify forcing a signal to a particular state.
In particular, assertion and assert refer to a signal that is active
or true; negation and negate indicate a signal that is inactive or
false. These terms are used independently of the voltage level
(high or low) that they represent.
FUNCTION CODES
ASYNCHRONOUS
TRANSFER SIZE
ADDRESS BUS
BUS CONTROL
DATA BUS
Figure 3-1. Functional Signal Groups
M68020 USER’S MANUAL
**
FC2–FC0
*
D31–D0
DSACK0
DSACK1
*
*
A31–A0
DBEN
CDIS
SIZ0
SIZ1
OCS
ECS
RMC
R/W
DS
AS
NOTE
MC68020
*
*
RESET
IPEND
AVEC
BERR
BGACK
HALT
IPL0
IPL1
IPL2
GND
CLK
BR
BG
V
CC
INTERRU
CONTRO
BUS ARB
CONTRO
BUS EXC
CONTRO
3- 1