HT49R50 Holtek Semiconductor Inc, HT49R50 Datasheet - Page 8

• Manufacturer Part Number: HT49R50
• Description: 8-Bit Microcontroller
• Manufacturer: Holtek Semiconductor Inc

A.C. Characteristics
Note: t
Symbol
I
R
f
f
f
t
t
t
t
Symbol
SYS1
SYS2
TIMER
OH
WDTOSC
RES
SST
INT
PH
SYS
I/O Ports and INT0, INT1
= 1/f
I/O Ports Source Current
Pull-high Resistance of
System Clock (Crystal OSC)
System Clock (RC OSC)
(TMR0/TMR1)
Watchdog Oscillator
External Reset Low
Pulse Width
System Start-up
Timer Period
Interrupt Pulse Width
Timer I/P Frequency
SYS
Parameter
Parameter
V
3V
5V
3V
5V
3V
5V
3V
5V
¾
¾
¾
DD
V
Test Conditions
3V
5V
3V
5V
DD
Test Conditions
8
V
V
V
V
V
V
V
V
Power-up or
wake-up from halt
DD
DD
DD
DD
DD
DD
DD
DD
V
V
V
V
Conditions
=3V
=5V
=3V
=5V
=3V
=5V
=3V
=5V
DD
OH
DD
OH
Conditions
=3V,
=5V,
=2.7V
=4.5V
¾
¾
¾
¾
Min.
Min.
455
455
400
400
45
35
-1
-2
40
10
¾
0
0
1
1
Typ.
1024
-1.5
Typ.
-3
60
30
90
65
¾
¾
¾
¾
¾
¾
¾
¾
August 18, 1999
Max. Unit
Max. Unit
4000
4000
2000
3000
4000
4000
180
130
HT49C50
80
50
¾
¾
¾
¾
¾
Ta=25°C
kHz
kHz
kHz
kHz
kHz
kHz
t
mA
mA
kW
kW
ms
ms
ms
SYS
ms