Motorola MC68030 User Manual page 120

Signal Name
Data Transfer and
Size Acknowledge
Synchronous
Termination
Cache Inhibit In
Cache Inhibit Out
Cache Burst Request
Cache Burst
Acknowledge
Interrupt Priority Level
Interrupt Pending
Autovector
Bus Request
Bus Grant
Bus Grant Acknowledge
Reset
Halt
Bus Error
Cache Disable
MMU Disable
Pipe Refill
Microsequencer Status
Clock
Power Supply
Ground
MOTOROLA
Table 5-1. Signal Index (Sheet 2 of 2)
Mnemonic
DSACK0/ Bus response signals that indicate the requested data transfer operation
DSACK1 is completed. In addition, these two lines indicate the size of the external
bus port on a cycle-by-cycle basis and are used for asynchronous
transfers.
STERM Bus response signal that indicates a port size of 32 bits and that data
may be latched on the next falling clock edge.
CIIN Prevents data from being loaded into the MC68030 instruction and data
caches.
CIOUT Reflects the CI bit in ATC entries or TTx register; indicates that external
caches should ignore these accesses
CBREQ Indicates a burst request for the instruction or data cache.
CBACK Indicates that the accessed device can operate in burst mode.
IPL0–IPL2 Provides an encoded interrupt level to the processor.
IPEND Indicates that an interrupt is pending.
AVEC Requests an autovector during an interrupt acknowledge cycle.
BR Indicates that an external device requires bus mastership.
BG Indicates that an external device may assume bus mastership.
BGACK Indicates that an external device has assumed bus mastership.
RESET System reset.
HALT Indicates that the processor should suspend bus activity.
BERR Indicates that an erroneous bus operation is being attempted.
CDIS Dynamically disables the on-chip cache to assist emulator support.
MMUDIS Dynamically disables the translation mechanism of the MMU.
REFILL Indicates when the MC68030 is beginning to fill pipeline.
STATUS Indicates the state of the microsequencer
CLK Clock input to the processor.
V Power supply.
CC
GND Ground connection
MC68030 USER'S MANUAL
Signal Description
Function
5-3