ST2604B datasheet(5/33 Pages) SITRONIX

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ST2604B

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SIGNAL DESCRIPTIONS

TABLE 4-1 Signal Function Groups

Function Group

Pad No.

Designation

Description

Power

VCC , PVCC, AVCC

VCC: Power supply for system

AVCC: Power supply for LCD function

PVCC: Power supply for PSGO and PSGOB

NOTE: PVCC level must not be higher than VDD level.

Ground

GND , PGND, AGND

GND: System power ground

AGND: Power ground for LCD function

PGND: Power ground for PSGO and PSGOB

System control

RESET ,

TEST,

MMD/ CS0

RESET : Active low system reset signal input

TEST: Leave this pin open when normal operation

MMD/

CS0 : Memory modes selection pin

Normal mode: Enable internal ROM.

MMD/ CS0 is connected to GND.

Emulation mode: Disable internal ROM.

MMD/ CS0 is connected to the chip-select pin of external

ROM. During reset period, the MMD/ CS0 is an internally

pulled-up input pin. After reset cycles, MMD/ CS0 is

changed to be an output pin. It will output signal CS0 .

Clock

XIO,OSCI

OSCXO,OSCXI, ,

High frequency oscillator (OSC) mode selected by code-option

Crystal mode: One crystal or resonator should be connected

between OSCI and XIO

Resistor oscillator mode: One resistor should be connected

between OSCI and VCC

OSCXI, OSCXO: Connect one 32768Hz crystal between these

two pins when using low frequency oscillator

WR / SEG9,

RD / SEG8

External memory R/W control signals / LCD Segment drivers

A[22:0]/SEG32~SEG10

External memory address bus / LCD Segment drivers

External memory

bus signals

/ LCD drivers

D[7:0]/SEG7~SEG0

External memory data bus / LCD Segment drivers

PSG/PWM DAC

PSGO, PSGOB

PSG outputs. Connect to one buzzer or speaker

Keyboard scan

signal (return line)

PA7~0

I/O port A

GPIO / LCD drivers

PB6~0/SEG47~SEG41

I/O port B / LCD Segment drivers

Chip selects / LCD

drivers

CS5

/PD4~0 /

SEG37~SEG33,

CS6 /A23/PD5 /SEG38

I/O port D and chip-select outputs / LCD Segment drivers

UART

RXD0/PC7,TXD0/PC6,

RXD1/PD7/SEG40,TXD1/

PD6/SEG39

UART signals and I/Os / LCD Segment drivers

SPI

DATA_READY /PC5 ,

SS /PC4 , SDO/PC3 ,

SDI/PC2 , SCK/PC1

SPI signals and I/Os

ST2604B Datasheet(PDF) 5 Page - Sitronix Technology Co., Ltd.

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