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5.7 Port I/O Characteristics
With the M34514T-MCU, port I/O characteristics are different from actual MCUs because there is
an emulation circuit in ports P0, P1, P2 and D0 to D5. Table 5.2 lists port I/O characteristics of the
M34514T-MCU.
Table 5.2 Emulation port I/O characteristics
Port
P0, P1
Input 74HC4050
Device Item Voltage
VCC = 2.0 V
V
CC = 4.5 V
VCC = 2.0 V
V
CC = 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
VI/O = VCC to GND
I
I/O ≤ 1 mA
VI/O = VCC or GND
I
I/O ≤ 1 mA
VI/O = VCC to GND
I
I/O ≤ 1 mA
V
OH = MAX
I
OL = 16 mA
I
OL = MAX
96 Ω
200 Ω
10 Ω
-
1.5 V
3.15 V
-
-
-
-
-
-
-
-
0.5 V
1.35 V
250 µA
40 mA
0.4 V
0.7 V
V
CC = 4.75 V
V
CC = 2.0 V
V
CC = 4.5 V
V
CC = 4.5 V
V
CC = 2.0 V
VCC = 4.5 V
V
CC = 2.0 V
VCC = 4.5 V
V
CC = 4.75 V
V
IH
VIL
IOH
IOL
VOL
RON
RON
VIH
VIL
IOH
IOL
VOL
74LS06
74HC4066
74HC4050
74LS06
Output
Input/
output
Input
Output
P2
D
5 to D0