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Signal Name
Transmit Data
Clear-to-Send
Request-to-Send/
OP1, OP0
Serial Clock
Transmitter Ready/OP6
Receiver Ready/
FIFO Full/OP4
DMA Request
DMA Acknowledge
DMA Done
Timer Gate
Timer Input
Timer Output
Test Clock
Test Mode Select
Test Data In
Test Data Out
Synchronizer Power
System Power Supply and
Return
MOTOROLA
Freescale Semiconductor, Inc.
Table 2-5. Signal Summary (Continued)
Mnemonic
TxDA, TxDB
CTSA, CTSB
RTSB, RTSA
SCLK
T RDYA
R RDYA
DREQ2, DREQ1
DACK2, DACK1
DONE2, DONE1
TGATE2,
TGATE1
TIN2, TIN1
TOUT2, TOUT1
TCK
TMS
TDI
TDO
V CCSYN
V CC , GND
MC68340 USER'S MANUAL
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Go to: www.freescale.com
Input/Output
Active State
Out
—
In
Low
Out/Out
Low/—
In
—
Out/Out
Low/—
Out/Out/Out
Low/Low/—
In
Low
Out
Low
I/O
Low
In
Low
In
—
Out
—
In
—
In
High
In
High
Out
High
–
—
–
—
Three-State
No
—
No
—
No
No
—
No
No
—
—
Yes
—
—
—
—
—
—
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