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6.7 Characteristics of I/O Ports
Characteristics of Ports P0, P1, P2, D0 to D7 of the M34551T2-MCU differ from those of actual MCU,
because the M34551T2-MCU have emulation circuit. Table 6.3 shows characteristics of the
emulation ports.
Table 6.3 Characteristics of emulation ports
Port I/O
P0, P1
D
5 - D0
Input/
Output
Device
74HC4066
Item Voltage
Vcc=2.0 V
Vcc=4.5 V
Vcc=2.0 V
Vcc=4.5 V
Min.
1.5 V
3.15 V
-
-
-
-
-
-
160 Ω
70 Ω
Max.
-
-
0.5 V
1.35 V
250 µA
40 mA
0.4 V
0.7 V
-
130 Ω
Remarks
V
OH=MAX
I
OL=16 mA
I
OL=MAX
V
I/O=Vcc to GND
II/O≤1 mA
VI/O=Vcc or GND
II/O≤1 mA
96 Ω 200 Ω
V
I/O=Vcc to GND
II/O≤1 mA
10 Ω -
1.5 V
3.15 V
-
-
-
-
-
-
-
-
0.5 V
1.35 V
250 µA
40 mA
0.4 V
0.7 V
VOH=MAX
I
OL=16 mA
I
OL=MAX
Vcc=4.75 V
Vcc=2.0 V
Vcc=4.5 V
Vcc=4.5 V
Vcc=2.0 V
Vcc=4.5 V
Vcc=2.0 V
Vcc=4.5 V
Vcc=4.75 V
VIH
VIL
IOH
IOL
VOL
RON
RON
VIH
VIL
IOH
IOL
VOL
Output 74LS06
D
5 Input 74HC541
P2
Output
Input 74HC541
74LS06