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7 port i/o timing – Renesas MCU Board for PC4504 Emulator System M34570T-MCU User Manual

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Figure 5.2 P0, P1 and D port output timings

5.7 Port I/O Timing

(1) Port input timing

Port input timings are the same as with the actual MCUs.

(2) Port output timing

When using the M34570T-MCU, output timings are different from those of the actual MCUs for
the following ports that are configured with port emulation circuits:

• Ports P0

0

to P0

3

• Ports P1

0

to P1

3

• Ports D

0

to D

5

With the actual MCUs, changes occur at the beginning of the T3 state of an output instruction.
With the M34570T-MCU, changes occur at the beginning of the T2 state of the next output
instruction. Figure 5.2 shows the port output timings of the actual MCUs and M34570T-MCU.
For the other ports, the output timings are the same as with the actual MCUs.

Output instruction

Next output instruction

System clock

X

IN

P0, P1, D port
output timings

on actual MCUs

P0, P1, D

0

to D

5

port output timings of

M34570T-MCU