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5.8 Pulldown Transistor Control
Since ports D
resistors using the pulldown control register. If you want to use the internal pulldown resistors, turn
on switches SW4 to SW10 when occasion demands. With the M34282T5-OPT, the port's resistance
value of the pulldown resistor is 150 kΩ.
When changing the resistance value of the pulldown resistor, replace RA1 (ports E
RA2 (ports G
5.9 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 M34282T5-OPT, output timings are different from those of the actual MCUs for
the ports D
With the actual MCUs, changes occur at the beginning of the T4 state of an output instruction.
With the M34282T5-OPT, changes occur at the beginning of the T2 state of the next output
instruction. Figure 5.2 shows the port timings of the actual MCUs and M34282T5-OPT.
Port output timings of ports E
Instruction clock
Ports D, E and G
output timing
of actual MCU
Port D
output timing
of M34282T5-OPT
Port E
output timing
of M34282T5-OPT
Port G
output timing
of M34282T5-OPT
Figure 5.2 Ports D, E and G output timings
to D
, E
and G
to G
4
7
0
0
to G
) on the M34282T5-OPT. For the position of the pulldown resistor, see Figure 4.3.
7
4
to D
, E
and G
0
7
0
0
Output Instruction
STCK
contain emulation circuits, you can not control the pulldown
3
to G
that are configured with port emulation circuits.
3
, E
and CARR are the same as with the actual MCUs.
1
2
( 27 / 38 )
, G
to G
0
3
Next output Instruction
) and
0
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