MC68HC912DG128 Datasheet, PDF (400/452 Pages) Motorola, Inc – Microcontrollers

Freescale Semiconductor, Inc.
Electrical Specifications
Table 19-13. Peripheral Port Timing
Characteristic
Frequency of operation (E-clock frequency)
E-clock period
Peripheral data setup time (t_PDSU = t_cyc/2 + 40)
MCU read of ports
Peripheral data hold time
MCU read of ports
Delay time, peripheral data write
MCU write to ports
Symbol
f_o
t_cyc
t_PDSU
t_PDH
t_PWD
8.0 MHz
Min
Max
0.004
8.0
0.125
250
102
—
Unit
MHz
µs
ns
0
—
ns
—
40
ns
ECLK
PORTS
MCU READ OF PORT
t_PDSU
t_PDH
Figure 19-8. Port Read Timing Diagram
PORT RD TIM
ECLK
PORT A
MCU WRITE TO PORT
PREVIOUS PORT DATA
t_PWD
NEW DATA VALID
PORT WR TIM
Figure 19-9. Port Write Timing Diagram
Technical Data
400
MC68HC912DG128 — Rev 3.0
Electrical Specifications
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