Freescale Semiconductor, Inc.
Electrical Specifications
Table 20-13. Peripheral Port Timing
8.0 MHz
Characteristic
Symbol
Unit
Min
Max
8.0
f
Frequency of operation (E-clock frequency)
E-clock period
0.004
0.125
MHz
o
t
250
µs
cyc
Peripheral data setup time
t
102
0
—
—
40
71
ns
ns
ns
ns
PDSU
MCU read of portst
= t /2 + 40
cyc
PDSU
Peripheral data hold time
MCU read of ports
t
PDH
Delay time, peripheral data write
MCU write to ports except Port CAN
t
—
—
PWD
Delay time, peripheral data write
MCU write to Port CAN
t
PWD
MCU READ OF PORT
ECLK
tPDSU
tPDH
PORTS
Figure 20-8. Port Read Timing Diagram
MCU WRITE TO PORT
ECLK
tPWD
PREVIOUS PORT DATA
NEW DATA VALID
PORT A
Figure 20-9. Port Write Timing Diagram
Advance Information
380
68HC(9)12D60 — Rev 4.0
MOTOROLA
Electrical Specifications
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