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HE847701

HE80000 SERIES

March 26, 2004

Page 5 of 29

V1.03

This specification is subject to change without notice. Please contact sales person for the latest version before use.

Pin Name

Pin # I/O

Description

FXO,

FXI

107, 108

O,

B

External fast clock pin. Two types of oscillator can be selected by MO_FXTAL (‘0’

for RC type and ‘1’ for crystal type). For RC type oscillator, one resistor need to be

connected between FXI and GND. For crystal oscillator, one crystal need to be

placed between FXI and FXO. Please refer to application circuit for details.

TSTP_P

109

I

Test input pin. Please bond this pad and reserve a test point on PCB for debugging.

But for improving ESD, please connect this point with zero Ohm resistor to GND

.

SXO,

SXI

110, 111

O,

I

External slow clock pins. Slow clock is clock source for LCD display, TIMER1,

Time-Base and other internal blocks. Both crystal and RC oscillator are provided.

The slow clock type can be selected by mask option MO_SXTAL. Choose ‘0’ for RC

type and ‘1’ for crystal oscillator.

VDD

112

P

Positive power Input. 0.1 µF decoupling capacitors should be placed as close to IC

VDD and GND pads as possible for best decoupling effect.

PRT10[7..0]

113~120 B

8-bit bi-directional I/O port 10. The output type of I/O pad can be selected by mask

option MO_10PP[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 pad as input pad, “1” must be outputted before reading.

PRTD[7..0]

121~128 B

8-bit bi-directional I/O port D. The output type of I/O pad can also be selected by

mask option MO_DPP[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.

PRTD[7..2] can be used as wake-up pins. PRTD[7..6] can be as external interrupt

sources.

GND_PWM

129

O Dedicated Ground for PWM output.

PWM

130

O

The PWM output can drive speaker or buzzer directly. Set the bit2 of VOC register

as one to turn on PWM. Using VDD & PWM to drive output device.

PRTC[7..0]

131 ~

138

B

8-bit bi-directional I/O port C. PRTC[7:4] is shared with Key Scan Dedicated Input

SCNI[3:0]. The Key Scan function can be disabled by clearing MO_LCDKEY mask

option to ‘0’.

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.

VDD_RAM

139

P

Dedicated power input for RAM

CMSG[32..79] 140~187 O

COM[32..79] pads are shared with SEG[127..80] outputs. The functions of the pads

to be COM drivers or SEG drivers can be selected by mask option MO_COM[0].

Please refer to LCD driver configuration for details.

I: Input, O: Output, B: Bidirectional, P: Power.