Signal Summary - Motorola MC68030 User Manual

Table 5-2. Signal Summary
Signal Function
Signal Name Input/Output Active State Three-State
Function Codes
FCO-FC2 Output High Yes
Address Bus
AO-A31 Output High Yes
Data Bus DO-D31 Input/Output High Yes
Transfer Size
SIZO/SIZ1 Output High Yes
Operand Cycle Start
OCS Output Low No
External Cycle Start ECS Output Low No
ReadlWrite
RiW
Output High/Low
Yes
Read-Modify"Write Cycle RMC Output Low Yes
Address Strobe·
AS Output Low Yes
Data Strobe
DS Output Low Yes
Data Buffer Enable
DBEN Output Low Yes
Data Transfer and Size Acknowledge DSACKO/
Input Low
-
DSACK1
Synchronous Termination STERM Input Low
-
Cache Inhibit In CIIN Input Low
-
Cache Inhibit Out ClOUT Output Low Yes
Cache Burst Request CBREQ Output Low Yes
Cache Burst Acknowledge CBACK Input Low
-
Interrupt Priority Level IPLO-IPL2 Input Low
-
Interrupt Pending IPEND Output Low No
Autovector AVEC
Input Low
-
Bus Request
BR Input
Low
-
Bus Grant BG Output Low No
Bus Grant Acknowledge BGACK Input Low
-
Reset RESET Input/Output Low No
Halt
HALT Input Low
-
Bus Error BERR Input Low
-
Cache Disable CDIS Input Low
-
MMU Disable MMUDIS Input Low
-
Pipeline Refill REFILL Output Low
No
Microsequencer Status STATUS Output Low No
Clock
CLK Input
-
-
Power Supply
VCC
Input
- -
Ground GND Input
-
-
5-12
MC68030 USER'S MANUAL MOTOROLA