W536030T/060T/090T/120T

Publication Release Date: May 21, 2003

- 7 -

Revision A8

PAD Description, continued

SYMBOL

I/O

FUNCTION

TEST

I

Test pad. Active high with internal pull low resistor.

ROSC

I

clock source.

PWM1/DAC

O

While speech or melody is active, PWM1/DAC is speaker direct driving

output or DAC output controlled by voice output file.

PWM2

O

While speech or melody is active, PWM2 is another speaker direct

driving output.

ADDR (5)

O

External serial memory address write clock for voice extension

(W536120T only). The “Tri-sate serial bus” mask option can use tri-

sate WRP pad while external voice ROM is not available. Default that

mask option is disabled and fixes WRP pad state while external voice is

not enabled to get chip low power consumption.

CLK (5)

O

External serial memory address read clock for voice extension.

(W536120T only). The pad state is same as WRP pad depended on

“Tri-sate serial bus” mask option.

DATA (5)

I/O

External serial memory data in/out for voice extension (W536120T

only). The pad state is same as WRP pad depended on “Tri-sate serial

bus” mask option.

SEG0

−SEG39

O

Dedicated LCD segment output pads.

SEG40/PORTN.0



SEG43/PORTN.3

O/O

LCD segment output pads, and can be shared as general output by

register LCDM3 bit 1. Default function is segment pad.

SEG44/PORTM.0



SEG47/PORTM.3

O/I

LCD segment output pads, and can be shared as general input by

register LCDM3 bit 0. Default function is segment pad and PM5.1=0 to

inhibit LCD waveform abnormal.

SEG48/PORTL.0



SEG51/PORTL.3

O/O

LCD segment output pads, and can be shared as general output by

register LCDM2 bit 3. Default function is segment pad.

SEG52/PORTK.0



SEG55/PORTK.3

O/I

LCD segment output pads, and can be shared as general input by

register LCDM2 bit 2. Default function is segment pad and PM5.0 = 0 to

inhibit LCD waveform abnormal.

SEG56/PORTJ.0



SEG59/PORTJ.3

O/IO

LCD segment output pads, and can be shared as general input/output

by register LCDM2 bit 1. PM4 register is used to select input or output

while shared I/O function is active. Default function is segment pad and

PM4.3 = 0 to inhibit LCD waveform abnormal.

SEG60/PORTI.0



SEG63/PORTI.3

O/IO

LCD segment output pads, and can be shared as general input/output

by register LCDM2 bit 0. PM4 register is used to select input or output

while shared I/O function is active. Default function is segment pad and

PM4.2 = 0 to inhibit LCD waveform abnormal.