MC68HC812A4 Datasheet, PDF (333/342 Pages) Motorola, Inc – 16-bit device composed of standard on-chip peripheral modules connected by an intermodule bus. Modules include

18.13 Peripheral Port Timing
Characteristic
Frequency of operation (E-clock frequency)
E-clock period
Peripheral data setup time, MCU read of ports
t_PDSU = t_cyc/2 + 30
Peripheral data hold time, MCU read of ports
Delay time, peripheral data write, MCU write to ports
Electrical Characteristics
Peripheral Port Timing
Symbol
f_o
t_cyc
t_PDSU
t_PDH
t_PWD
5.0 MHz
Min
Max
dc
8.0
125
—
102
—
0
—
—
40
Unit
MHz
ns
ns
ns
ns
ECLK
PORTS
ECLK
PORT A
MCU READ OF PORT
t_PDSU
t_PDH
Figure 18-6. Port Read Timing Diagram
MCU WRITE TO PORT
t_PWD
PREVIOUS PORT DATA
Figure 18-7. Port Write Timing Diagram
NEW DATA VALID
Advance Information
MOTOROLA
Electrical Characteristics
MC68HC812A4 — Rev. 3.0
333