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Signal Description
2-18 M68060 USER’S MANUAL MOTOROLA
Table 2-8. Signal Summary
Signal Name Mnemonic Input/
Output
Active
State Three-State Reset
State
Address Bus A31–A0 Input/Output High Yes Three-Stated
Cycle Long-Word Address CLA Input Low
Data Bus D31–D0 Input/Output High Yes Three-Stated
Transfer Type 1 TT1 Input/Output High Yes Three-Stated
Transfer Type 0 TT0 Output High Yes Three-Stated
Transfer Modifier TM2–TM0 Output High Yes Three-Stated
Transfer Line Number TLN1,TLN0 Output High Yes Three-Stated
User-Programmable Attributes UPA1,UPA0 Output High Yes Three-Stated
Read/Write R/W Output High/Low Yes Three-Stated
Transfer Size SIZ1,SIZ0 Output High Yes Three-Stated
Bus Lock LOCK Output Low Yes Three-Stated
Bus Lock End LOCKE Output Low Yes Three-Stated
Cache Inhibit Out CIOUT Output Low Yes Three-Stated
Byte Select BS3–BS0 Output Low Yes Three-Stated
Transfer Start TS Input/Output Low Yes Three-Stated
Transfer in Progress TIP Output Low Yes Three-Stated
Starting Termination Acknowledge Signal Sampling SAS Output Low Yes Three-Stated
Transfer Acknowledge TA Input Low
Transfer Retry Acknowledge TRA Input Low
Transfer Error Acknowledge TEA Input Low
Transfer Burst Inhibit TBI Input Low
Transfer Cache Inhibit TCI Input Low
Snoop Control SNOOP Input Low
Bus Request BR Output Low No Negated
Bus Grant BG Input Low
Bus Grant Relinquish Control BGR Input Low
Bus Busy BB Input/Output Low Yes Three-Stated
Bus Tenure Termination BTT Input/Output Low Yes Three-Stated
Cache Disable CDIS Input Low
MMU Disable MDIS Input Low
Reset In RSTI Input Low
Reset Out RSTO Output Low No Negated
Interrupt Priority Level IPL2–IPL0 Input Low
Interrupt Pending IPEND Output Low No Negated
Autovector AVEC Input Low
Processor Status PST4–PST0 Output High No 10000
Processor Clock CLK Input
Clock Enable CLKEN Input Low
JTAG Enable JTAG Input Low
Test Clock TCK Input
Test Mode Select TMS Input High
Test Data Input TDI Input High
Test Data Output TDO Output High Yes Three-Stated
Test Reset TRST Input Low
Thermal Resistor Connections THERM1,
THERM0 —— —
Power Supply VCC Input —
Ground GND Input —
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