King Billion Electronics Co., Ltd.

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HE89C21

HE80000 SERIES

January 20, 2003

2

V1.0E

addressing mode are provided. Most of instructions take only 3 oscillator clocks to execute.

2. Features

Operation Voltage:

2.4V ~ 5.5V

Internal ROM:

16 KB Program ROM

Internal RAM:

512 Bytes.

Dual Clock System:

Fast clock:

32768 ~ 8M Hz

Slow clock:

32768 Hz

Operation Mode:

Fast, Slow, Idle, Sleep Mode.

16 bit Bi-directional general purpose I/O port with output type (push-pull or open drain)

selectable for each I/O pin by mask option.

4 COM x 32 SEG LCD driver (A, B type waveform selectable).

Built-in Regulator for providing LCD with a stable operation voltage over the battery life.

Built-in DTMF Generator.

Built-in Low Voltage Reset function

Two external interrupts and three internal timer interrupts.

Two 16-bit timers and one Time Base timer.

Watch Dog Timer to prevent deadlock condition.

Instruction set: 32 instructions with 4 addressing modes.

3. Pin Description

HE89C21

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

36

37

38

39

40

41

42

43

44

45

46

47

48

49

50

51

52

PRTC5

PRTC4

PRTC3

PRTC2

PRTC1

PRTC0

SEG31

SEG30

SEG29

SEG28

SEG27

SEG26

SEG25

SEG24

SEG23

SEG22

SEG21

SEG2

SEG1

SEG0

COM3

COM2

COM1

COM0

LC1

LC2

LV1

LV2

LV3

GND

RSTP

FXO

FXI

TSTP

Pin Name

Pin #

I/O

Description

PRTC[7..0]

66,67,1~6 B

8-bit bi-directional general purpose I/O port C. The output type of I/O pad can also be

selected by mask option MO_CPP[7..0] (‘1’ for push-pull and ‘0’ for open-drain).

As the output structure of I/O pad does not contain tri-state buffer. When using the

I/O as input, ‘1’ must be outputted before reading the pin.

SEG[31..0]

7 ~ 38

O LCD SEGMENT SEG[31..0] outputs.

COM[3..0]

39 ~ 42

O LCD COMMON COM[3..0[ outputs.

LC1

43

B Charge Pump Capacitor Pin

LC2

44

B Charge Pump Capacitor Pin