Motorola Espresso Maker MC68340 ユーザーズマニュアル
MOTOROLA
MC68340 USER’S MANUAL
2- 15
Table 2-5. Signal Summary (Continued)
Signal Name
Mnemonic
Input/Output
Active State
Three-State
Transmit Data
TxDA, TxDB
Out
—
No
Clear-to-Send
CTSA, CTSB
In
Low
—
Request-to-Send/
OP1, OP0
OP1, OP0
RTSB, RTSA
Out/Out
Low/—
No
Serial Clock
SCLK
In
—
—
Transmitter Ready/OP6
T
≈
RDYA
Out/Out
Low/—
No
Receiver Ready/
FIFO Full/OP4
FIFO Full/OP4
R
≈
RDYA
Out/Out/Out
Low/Low/—
No
DMA Request
DREQ2, DREQ1
In
Low
—
DMA Acknowledge
DACK2, DACK1
Out
Low
No
DMA Done
DONE2, DONE1
I/O
Low
No
Timer Gate
TGATE2,
TGATE1
In
Low
—
Timer Input
TIN2, TIN1
In
—
—
Timer Output
TOUT2, TOUT1
Out
—
Yes
Test Clock
TCK
In
—
—
Test Mode Select
TMS
In
High
—
Test Data In
TDI
In
High
—
Test Data Out
TDO
Out
High
—
Synchronizer Power
VCCSYN
–
—
—
System Power Supply and
Return
Return
VCC, GND
–
—
—
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Freescale Semiconductor, Inc.
For More Information On This Product,
Go to: www.freescale.com
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