st2608b Sitronix Technology Corporation, st2608b Datasheet - Page 5

• Manufacturer Part Number: st2608b
• Description: 8-bit Integrated Microcontroller
• Manufacturer: Sitronix Technology Corporation

4
Function Group
Power
Ground
System control
Clock
External memory
bus signals
/ LCD drivers
PSG/PWM DAC
Keyboard scan
signal (return line)
GPIO / LCD drivers
Chip selects / LCD
drivers
UART
SPI
SIGNAL DESCRIPTIONS
Pad No.
Designation
VCC , PVCC, AVCC
GND , PGND
TEST,
MMD/
XIO,OSCI
OSCXO,OSCXI, ,
A[22:0]/SEG32~SEG10
D[7:0]/SEG7~SEG0
PSGO, PSGOB
PA7~0
PB7~0/SEG63~SEG56
SEG37~SEG33,
RXD0/PC7,TXD0/PC6,
RXD1/PD7/SEG40,TXD1/
PD6/SEG39
SDI/PC2 , SCK/PC1
RESET ,
RD / SEG8
CS5
CS6
DATA_READY
SS
WR / SEG9,
/PC4 , SDO/PC3 ,
/A23/PD5 /SEG38
~
CS0
1
/PD4~0 /
/PC5 ,
1.
Signal Function Groups
5/34
PSG outputs. Connect to one buzzer or speaker
Description
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.
GND: System power ground
PGND: Power ground for PSGO and PSGOB
TEST: Leave this pin open when normal operation
MMD/
High frequency oscillator (OSC) mode selected by code-option
OSCXI, OSCXO: Connect one 32768Hz crystal between these
External memory R/W control signals / LCD Segment drivers
External memory address bus / LCD Segment drivers
External memory data bus / LCD Segment drivers
I/O port A
I/O port B / LCD Segment drivers
I/O port D and chip-select outputs / LCD Segment drivers
UART signals and I/Os / LCD Segment drivers
SPI signals and I/Os
RESET : Active low system reset signal input
Normal mode: Enable internal ROM.
Emulation mode: Disable internal ROM.
Crystal mode: One crystal or resonator should be connected
Resistor oscillator mode: One resistor should be connected
MMD/
MMD/
ROM. During reset period, the MMD/
pulled-up input pin. After reset cycles, MMD/
changed to be an output pin. It will output signal
CS0
between OSCI and XIO
between OSCI and VCC
two pins when using low frequency oscillator
: Memory modes selection pin
CS0
CS0
is connected to GND.
is connected to the chip-select pin of external
CS0
is an internally
CS0
CS0
is
ST2608B
.