
MOTOROLA
MC68306 USER'S MANUAL
8- 17
8.14 AC ELECTRICAL CHARACTERISTICS—INTERRUPT RESET
TIMING (See Figure 8-14 and Note)
Characteristic
Symbol
Min
Max
Unit
OP3 High (When Used as Counter Interrupt) from LDS Negated
After Stop Counter Command
tIR
—
100
ns
NOTE: Test conditions for interrupt output: CL = 50 pF, RL = 2 k to VCC.
t
IR
LDS
OP3
*
* When used as counter interrupt output.
Figure 8-14. Interrupt Reset Timing
8.15 AC ELECTRICAL CHARACTERISTICS—TRANSMITTER TIMING
(See Figure 8-15 and Note)
Characteristic
Symbol
Min
Max
Unit
TxD Output Valid from TxC Low
tTxD
—
100
ns
CTS Input Setup to Tx Clock High *
tCS
30
—
ns
CTS Input Hold from Tx Clock High *
tCH
30
—
ns
RTS Output Valid from Tx Clock
tTRD
—
100
ns
* CTS is an asynchronous input. This specification is only provided to guarantee CTS recognition on a particular Tx clock
edge.
Tx CLOCK SOURCE
(X1 OR IP2)
TxD
t
TxD
1 BIT TIME
OP0, OP1
WHEN USED
AS TxRTS
t
TRD
tCS
IP0, IP1
WHEN USED
AS CTS
t
TxD
t CH
Figure 8-15. Transmit Timing
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Freescale Semiconductor, Inc.
For More Information On This Product,
Go to: www.freescale.com
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