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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
D5 - 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
VOH=MAX
IOL=16 mA
IOL=MAX
VI/O=Vcc to GND
II/O≤1 mA
VI/O=Vcc or GND
II/O≤1 mA
96 Ω200 Ω
VI/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
IOL=16 mA
IOL=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
D5Input 74HC541
P2
Output
Input 74HC541
74LS06