HT36A4
Pad Description
Internal
Connection
Pad Name I/O
Function
Pull-High
or None
PA0~PA7
I/O
Bidirectional 8-bit Input/Output port, wake-up by mask option
VSSA
VSS
Negative power supply of DAC, ground
Negative power supply, ground
Positive power supply
¾
¾
¾
¾
¾
O
¾
¾
¾
¾
¾
¾
¾
VDD
VDDA
TEST
AUD
DAC power supply
No connection (open)
Audio output for driving a external transistor or for driving HT82V733
Reset input, active low
RES
I
OSC1 and OSC2 are connected to an RC network or a crystal (by mask option)
for the internal system clock. In the case of RC operation, OSC2 is the output ter-
minal for 1/8 system clock. The system clock may come from the crystal, the two
pins cannot be floating.
OSC1
OSC2
I
¾
O
Absolute Maximum Ratings
Supply Voltage ............................ VSS-0.3V to VSS+6V
Input Voltage ............................ VSS-0.3V to VDD+0.3V
Storage Temperature .......................... -50°C to 125°C
Operating Temperature ......................... -25°C to 70°C
Note: These are stress ratings only. Stresses exceeding the range specified under ²Absolute Maximum Ratings² may
cause substantial damage to the device. Functional operation of this device at other conditions beyond those
listed in the specification is not implied and prolonged exposure to extreme conditions may affect device reliabil-
ity.
D.C. Characteristics
Ta=25°C
Test Conditions
Conditions
Symbol
VDD
Parameter
Min.
Typ.
Max.
Unit
VDD
Operating Voltage
Operating Current
2.4
3
8
5
V
¾
¾
No load
IDD
5V
5V
16
mA
¾
f
OSC=8MHz
No load
ISTB
Standby Current (WDT Disabled)
1
¾
¾
mA
System HALT
IOL
VOL=0.5V
I/O Ports Sink Current
5V
5V
5V
5V
5V
5V
5V
9.7
-5.2
11
16.2
-8.7
22
mA
mA
kW
V
¾
¾
44
5
IOH
VOH=4.5V
I/O Ports Source Current
RPH
VIH1
VIL1
VIH2
VIL2
VIL=0V
¾
Pull-High Resistance of I/O Ports
Input High Voltage for I/O Ports
Input Low Voltage for I/O Ports
Input High Voltage (RES)
Input Low Voltage (RES)
3.5
0
¾
1.5
¾
¾
V
¾
¾
4
V
¾
¾
2.5
V
¾
¾
Rev. 1.00
3
July 2, 2003
HOLTEK [ HOLTEK SEMICONDUCTOR INC ]
