ht827a0 Holtek Semiconductor Inc., ht827a0 Datasheet - Page 5

• Manufacturer Part Number: ht827a0
• Description: 8-bit Microcontroller With Voice Rom
• Manufacturer: Holtek Semiconductor Inc.

Absolute Maximum Ratings
Supply Voltage..............................-0.3V to 5.5V
Input Voltage .................V
Note: These are stress ratings only. Stresses exceeding the range specified under ²Absolute Maxi-
Pad No. Pad Name I/O
13~20
6
7~10
11
12
29
30
31
32
33
mum Ratings² may cause substantial damage to the device. Functional operation of this de-
vice at other conditions beyond those listed in the specification is not implied and prolonged
exposure to extreme conditions may affect device reliability.
PD0~PD7
VSS
PE0~PE3
INT
TMR
AUD
RES
VDD
OSC1
OSC2
I/O
I/O
¾
¾
O
O
SS
I
I
I
I
-0.3V to V
Crystal or
Pull-high
Pull-high
Option
or None
or None
Mask
RC
¾
¾
¾
¾
¾
¾
DD
+0.3V
Bidirectional 8-bit input/output ports
Software instructions determine the CMOS output or
schmitt trigger input with or without a pull-high resistor
(mask option).
Negative power supply, ground
Bidirectional 8-bit input/output ports
Software instructions determine the CMOS output or
schmitt trigger input with or without a pull-high resistor
(mask option).
External interrupt schmitt trigger input with a
pull-high resistor
Edge triggered is activated on a high to low transition.
Schmitt trigger input for a timer/event counter
Audio output for driving an external transistor
PMOS open drain output
Schmitt trigger reset input, active low
Positive power supply
OSC1 and OSC2 connect to an RC network or crystal os-
cillator (determined by mask option) for an internal sys-
tem clock. In the case of RC operation, an oscillation
resistor connects to OSC1. OSC2 is the output terminal
of a 1/4 system clock.
5
Storage Temperature.................-50°C to 125°C
Operating Temperature ..............-25°C to 70°C
Description
March 15, 2000
HT827A0