User's Manual
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(3) Port I/O Characteristics
With the M34519T-MCU, port I/O characteristics are different from actual MCUs because there
are emulation circuits in ports P00--P03, P10--P13 and D0--D5. Table 4.2 lists port I/O
characteristics of the M34519T-MCU.
Table 4.2 Emulation port I/O characteristics
*1 According to the setting of the output method control register FRx, change its device for output
in the emulation circuit.
• When N-ch open drain output chosen: 74ALS641
• When CMOS output chosen: 74VHC125
4.5 A-D Converter
For the M34519T-MCU, its voltage is fixed at 3 V or 5 V. Therefore, because of the difference of
voltage, the results of its A/D conversions are slightly different from the theoretical values. And, some
characteristics are different from those of actual MCUs, because a flat cable and pitch converter board
and other devices are used between the evaluation MCU and target system.
VOL
IOL
Port
P0, P1,
D0--D5
Input 74HC245
Device Item Condition
VCC = 2.0 V
VCC = 4.5 V
VCC = 2.0 V
VCC = 4.5 V
VCC = 4.5 V
VCC = 5.0 V
VCC = 3.0 V
VCC = 4.5 V
VCC = 3.0 V
VCC = 4.5 V
VCC = 2.0 V
VCC = 4.5 V
VCC = 4.5 V
VCC = 12 V
VCC = 12 V
Min.
1.50 V
3.15 V
-
-
-
-
2.48 V
3.94 V
-
-
-
-
-
-
-
Max.
-
-
0.50 V
1.35 V
0.5 V
48 mA
-
-
0.44 V
0.44 V
-
200 Ω
-
±1 µA
±1 µA
Remarks
I
OH
= -4 mA
I
OH
= -8 mA
I
OL
= 4 mA
I
OL
= 8 mA
VIH
VIL
VOH
VOL
RON
RON
IOFF
IZ
74ALS641
74VHC125
74HC4066
Output*
1
Input/
Output
P21, P22
Standard
-
-
-
-
0.35 V
-
-
-
-
-
160 Ω
96 Ω
10 Ω
-
-