W78C801 Datasheet, PDF (12/18 Pages) Winbond – 8-BIT MICROCONTROLLER

W78C801
DC Characteristics, continued
PARAMETER
SYM.
SPECIFICATION
TEST CONDITIONS
MIN. MAX. UNIT
Input High Voltage
P1, P2, P3, P4
VIH1
2.4 VDD +0.2
V VDD = 5.5V
Input High Voltage
RST
VIH2
3.5 VDD +0.2
V VDD = 5.5V
Input High Voltage
XTAL1^[*4]
VIH3
3.5 VDD +0.2
V VDD = 5.5V
Output
Output Low Voltage
P1, P2, P3, P4
VOL1
-
0.45
V VDD = 4.5V
IOL = +2 mA
Output Low Voltage
P0, ALE, PSEN ^[*4]
VOL2
-
0.45
V VDD = 4.5V
IOL = +4 mA
Sink Current
P1, P2, P3^[5] , P4<0:4>
Isk1
4
12
mA VDD = 4.5V
VIN = 0.45V
Sink Current
P0, ALE, PSEN , P4<5:6>
Isk2
10
20
mA VDD = 4.5V
VIN = 0.45V
Sink Current
Isk3
15
24
mA VDD = 4.5V
P3.4 to P3.7 in High-drive Mode
VIN = 0.45V
Output High Voltage
P1, P2, P3, P4
VOH1
2.4
-
V VDD = 4.5V
IOH = -100 µA
Output High Voltage
P0, ALE, PSEN ^[*4]
VOH2
2.4
-
V VDD = 4.5V
IOH = -400 µA
Source Current
P1, P2, P3, P4<0:4>
Isr1 -120 -250
µA VDD = 4.5V
VIN = 2.4V
Source Current
P0, ALE, PSEN , P4<5:6>
Isr2
-10
-14
mA VDD = 4.5V
VIN = 2.4V
Notes:
*1. RST pin has an internal pull-down.
*2. Pins of P1 and P3 can source a transition current when they are being externally driven from 1 to 0.
*3. RST is a Schmitt trigger input and XTAL1 is a CMOS input.
*4. P0, P2, ALE and PSEN are tested in the external access mode.
*5. P3.4 to P3.7 are in normal mode.
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