Syntek Semiconductor Co.,Ltd.

Lcd Controller 1/ 15

STK55C321

STK55C321 SPECIFICATION

1. CHIP FEATURES :

* Operating voltage 2.5V - 4.0V.

* Maximum operating frequency is 3.5MHz at 4V.

* Operating current under 1.3mA at 770KHz, 4V.
* 40 segments and 8 commons out for LCD driver.
- 1/4 duty and 244Hz frame frequency.
- 1/8 duty and 122Hz frame frequency.
* 2 bi-directional I/O port.
- 8 pins for port 1.
- 4 pins with selectable interrupt for port 2.
- 4 pins without interrupt for port 2.
* Built in 192 bytes RAM (including LCD storage area).
* Built in 10K bytes ROM.
* Selectable (system clock/16384) interrupt by NMI.
* Timer and port 2 interrupt by IRQ.
* SOUND output from CPU or two independent 16-bit counter.
* 256 sound volumes for channel 1. 8 sound volumes for channel 2.
* Code options :
- 1/3 bias or 1/4 bias for LCD driver.
- 1/4 duty or 1/8 duty for LCD driver.
- Pull-up resistors for I/O pin.
- RC or CRYSTAL oscillator.
- System clock = OSC clock or OSC clock/2.

2. APPLICATION :

* Hand-held game

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3. PIN DESCRIPTION :

Pin name

I/O

Function description

COM1-COM8

Output pins for driving the common pins on the LCD panel.

SEG1-SEG40

Output pins for driving the segment pins on the LCD panel

SOUND1

Output pins for sound generator 1

SOUND2

Output pins for sound generator 2

P10-P17

I/O

8 bit bi-directional pins for port 1

P20-P27

I/O

8 bit bidirectional pins for port 2

OSC1

Oscillator input pin for chip

OSC2

Oscillator output pin for resistor

OSC3

Oscillator output pin for capacitor

/TEST

Test pin. Keep floating or connect to Vdd

/RES

Chip reset

Bias supply voltage pin to drive the LCD

VDD

Power input

VSS

Signal ground

Note: The substrate should be connected to VSS or floating.

4. ADDRESS ARRANGEMENT :

1) RAM
0000-003F for LCD output data storage area 1.

Memory address

Pin for 1/8 duty

Pin for 1/4 duty

0000-0004

COM1

0008-000C

COM2

0010-0014

COM3

0018-001C

COM4

COM8

0020-0024

COM5

0028-002C

COM6

0030-0034

COM7

0038-003C

COM8

0040-007F for LCD output data storage area 2.

Memory address

Pin for 1/8 duty

Pin for 1/4 duty

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0040-0044

COM1

0048-004C

COM2

0050-0054

COM3

0058-005C

COM4

COM8

0060-0064

COM5

0068-006C

COM6

0070-0074

COM7

0078-007C

COM8

* The LSB of low byte - SEG1.
The MSB of high byte - SEG40.
The middle bits are in the order.
The un-specified area between 0000-007F are general purpose RAM.

00C0-00FF for zero and stack page area.

* 0000-00FF are the same location with 0100-01FF.
* The data or stack can be stored in this area, but be careful not to make

conflict.

2) ROM
D800-FFFF for program area.

FFFF,FFFE - IRQ vector.
FFFD,FFFC - RES vector.
FFFB,FFFA - NMI vector.

Please note that A14 and A15 are not cared in hardware. So, following
memory areas are mapping in the same location.

0000-3FFF, 4000-7FFF, 8000-BFFF AND C000-FFFF.

3) Other

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0080 To enter stand-by mode. Write only.

* Write this address, will make CPU into stand-by mode.
* CPU will be hold with LCD state no change.
* When in stand-by mode, the NMI or IRQ will wake up the CPU. After doing

the interrupt routine, the program must access this address to enter stand-by
again.

0081 To enter power-down mode. Write only.

Bit 0 : = 0 Disable power-down mode wake up timer.(default)

= 1 Enable power-down mode wake up timer.

1 : = 1 Into power-down mode.

In power-down mode, the oscillator will be stopped & LCD will be off. After
wake up, bit 1 will be cleared to zero and programmer have to clear bit 0. If the
wake up timer is enable, an oscillator warm-up time (defined by $008B &
008C before entering power-down mode) will be added before CPU been
waked up and the IRQ1 flag will be set after wake up.

0082 Set frame frequency. Write only.

Bit 0 : = 0 System clock/8192 for 1/8 duty.(default)

System clock/4096 for 1/4 duty.
= 1 System clock/4096 for 1/8 duty.
System clock/2048 for 1/4 duty.

0083 IRQ flag register. Read & write.

* Read

Bit 0 : if 1, there is timer interrupt, IRQ1.
Bit 1 : if 1, there is port 2 interrupt, IRQ2.

Write

Bit 0 : if 0, clear IRQ1 flag.
Bit 1 : if 0, clear IRQ2 flag.

* When in IRQ routine, clear this register before resetting the IRQ disable flag

of the CPU. Or, it will go into IRQ loop infinitely.

* Disable port 2 interrupt function before clear IRQ1 flag.

0084 Port 1 data. Read & write.

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0085 Set port 1 bit function. Write only.

* An '0' in this register will set the corresponding pin of port 1 as an output pin.
* The default value for each bit is one. A pull-up resistor can be added to the

pin by code option. But the pull-up resistor will be disabled if the output state
is low.

0086 Port 2 data. Read & write.

0087 Set port 2 bit function. Write only.

* An '0' in this register will set the corresponding pin of port 2 as an output pin.
* The default value for each bit is one. A pull-up resistor can be added to the

pin by code option. But the pull-up resistor will be disabled if the output state
is low.

0088 Set port 2 bit interrupt function. Write only.

Bit 3-0 : Set interrupt function.

7-4 : Reserved.

* An '0' in this register will set the interrupt function of the corresponding pin of

port 2 to be enable. That is, an interrupt will be generated if a low level is
detected in the pin.

* The default value for each bit is one.

0089 Set low byte of sound generator 1 frequency divider. Write only.

008A Set high byte of sound generator 1 frequency divider. Write only.

* Program sequence should be low byte first then high byte.
* Output frequency = system clock/[($008A)x256+($0089)+1]/2

008B Timer data. Read & write.

* Before writing $008B, the program should select timer clock ($008C) first.
* After $008B been written, the timer will start to count down. When timer

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counts to zero, IRQ1 will happen.

* The time elapse = [($008B)+1]/timer clock

008C Timer clock select for different interrupt time range. Write only. (default

unknown)
Bit 2-0 : = 000 System clock/2

= 001 System clock/8
= 010 System clock/32
= 011 System clock/128
= 100 System clock/512
= 101 System clock/2048
= 110 System clock/8192
= 111 System clock/32768

008D Control register. Write only.

Bit 0 : = 0 Disable sound generator 1.

= 1 Output sound generator 1 to SOUND1 pin.

1 : = 0 Disable bit 7 of port $008D.

= 1 Output bit 7 of port $008D to SOUND1 pin.

2 : = 0 Disable NMI.

= 1 Enable NMI.

4 : = 0 LCD off.

= 1 LCD on.

5 : = 0 Disable timer.

= 1 Enable timer.

6 : = 0 Select LCD data area from 0000-003F.

= 1 Select LCD data area from 0040-007F.

7 : = 0 Set sound output to low.

= 1 Set sound output to high.

Bit default value is zero. Bit 4 will be reset to zero while getting into power-
down mode.

Sound generator 1 output

Bit 0 of $008D

NAND

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Bit 7 of $008D
Bit 1 of $008D

$008E

008E Define sound volume. Write only.(default unknown)

Bit 7-0 : define the volume of SOUND1 pin.

0090 Write function : Set low byte of sound generator 2 frequency divider.

Read function : Read pseudo random counter low byte value.

0091 Set high byte of sound generator 2 frequency divider. Write only.

* The value of bit 7 don't care.
* When load divider value, low byte first then high byte. After high byte is

written, the new value will be loaded to counter.

0092 Set sound generator 2 clock. Write only. (Default unknown)

Bit 0-2 : = 000 System clock

= 001 System clock/4
= 010 System clock/16
= 011 System clock/64
= 100 System clock/256
= 101 System clock/1024
= 110 System clock/4096
= 111 System clock/16384

Bit 7-5 : Define volume of SOUND2 pin.

0093 Set sound generator 2 function. Write only.

Bit 0 : = 0 Sound generator 2 works in mode 0.

= 1 Sound generator 2 works in mode 1.

1 : = 0 Reset sound generator 2 counter.

NAND

S
0
1

MUX

SOUND

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= 1 Enable sound generator 2 counter.

2 : = 0 Disable sound generator 2 output to SOUND2 pin.

= 1 Enable sound generator 2 output to SOUND2 pin.

The default value is zero.
In mode 0, sound generator 2 work as a 15-bit pseudo random noise generator.
The shift direction is from LSB to MSB. The values of $0090 and $0091 don't
care.
In mode 1, sound generator 2 work as a 15-bit pseudo random counter. Its
initial value is defined by $0090 and $0091. A pulse will be output while 0000H
is encountered and the initial value will be reloaded. The output pulse will be
divided by two to output a square wave to SOUND2 pin.

4) Interrupts

* There are three interrupt sources :

NMI - Fix frequency (system frequency/16384) interrupt.
IRQ1 - Timer interrupt.
IRQ2 - External interrupt by port 2.

* Only IRQ2 will wake up CPU from power-down mode, but all interrupts will wake

up CPU from standby mode.

* If $0081 bit 0 is set to 1, an oscillator warm-up time (defined by $008B & $008C)

will be added before CPU been waked up. After wake up, programmer should clear
this bit.

* After CPU wake up from power-down mode, programmer should turn on LCD

0 1 2 3 4 5 6 7 0 1 2 3 4 5 6

NOT

XOR

Output
(mode 0)

All bits = 0

1/2

Output
(mode 1)

Low byte

High byte

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again.

* If want to accept IRQ in the middle of NMI loop, please reset the IRQ disable flag

of the CPU before IRQ signal comes.

* In the IRQ routine, the program decide from the port $0083 which interrupt (timer

or port 2) happens.

* When port 2 in input mode and pin interrupt enable, a low signal from pin will

generate IRQ2.

5) Reset states

Initial value after reset

0080

0081

0082

uuuuuuu0

0083

00000000

0084

states on pins

0085

11111111

0086

states on pins

0087

11111111

0088

uuuu1111

0089

uuuuuuuu

008A

uuuuuuuu

008B

uuuuuuuu

008C

uuuuuuuu

008D

00000000

008E

uuuuuuuu

0090

uuuuuuuu

0091

uuuuuuuu

0092

uuuuuuuu

0093

uuuuu000

Note : u -- unknown

5. ABSOLUTE MAXIMUM RATINGS :

Operating temperature .................................................................. 0 to 70

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Storage temperature ................................................................ -65 to 150
Supply voltage ........................................................................................ 7 V
Input voltage ................................................................... -0.6 to Vdd+0.6 V

6. ELECTRICAL CHARACTERISTIC :

Parameter

Symbol

Condition

Min

Typ.

Max

Unit

Supply Voltage

Vdd

2.5

3.0

4.0

Main system frequency

sys

Vdd=2.5V

0.8

Mhz

Vdd=3V

2.7

Mhz

Vdd=4.0V

3.5

Mhz

Crystal frequency

cry

32768

Operating current

Idd

Vdd=4V,

sys=1Mhz

Power-down current

Idown

Vdd=2.5V

0.2

�

Vdd=3.0V

0.3

�

Vdd=3.5V

0.8

�

Vdd=4.0V

�

Vdd=4.5V

�

Vdd=4.8V

�

Vdd=5.0V

�

Vdd=5.25V

220

�

Input high voltage

Vih

Vdd=5.0V

2.0

Input low voltage

Vil

Vdd=5.0V

-0.6

0.8

Input high leakage current

Iih

Vih=Vdd

-1

�

Input low leakage current

Iil

Vil=0

�

Output high voltage
(For SEGx and COMx)

Voh1

Ioh=-30

�

Vdd-

0.2

Vdd

Output low voltage
(for SEGx and COMx)

Vol1

Iol=40

�

0.2

Output high voltage
(for other pins)

Voh2

Ioh=-2mA

Vdd-

0.4

Vdd

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7. LCD WAVEFORM :

7.1 1/4 Bias, 1/8 Duty

1/frame frequency

Vdd

3/4 Vdd
2/4 Vdd

COM8

1/4 Vdd

Vss

Vdd

3/4 Vdd
2/4 Vdd

COM1

1/4 Vdd

Vss

Vdd

3/4 Vdd
2/4 Vdd

COM2

1/4 Vdd

Vss

Vdd

3/4 Vdd
2/4 Vdd

COM7

1/4 Vdd

Vss

Vdd

3/4 Vdd

SEGx

2/4 Vdd
1/4 Vdd

Vss

There are two LCD matrix DOTs active at (SEGx,COM1) and (SEGx,COM7)

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7.2 1/3 Bias, 1/8 Duty

1/frame frequency

Vdd

2/3 Vdd

COM8

1/3 Vdd

Vss

Vdd

2/3 Vdd

COM1

1/3 Vdd

Vss

Vdd

2/3 Vdd

COM2

1/3 Vdd

Vss

Vdd

2/3 Vdd

COM7

1/3 Vdd

Vss

Vdd

2/3 Vdd

SEGx

1/3 Vdd

Vss

There are two LCD matrix DOTs active at (SEGx,COM1) and (SEGx,COM7)

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Syntek Semiconductor Co., Ltd.

Customer Information Sheet for STK55C321

970926

1. Customer's Name : ____________________

2. Project title : _________________________

* 3. Syntek part number : ___________________

4. Package ---------------

( ) Chip

( ) 80-pin QFP

5. Options :

Oscillator type ----- ( ) RC

( ) XTAL

CPU freq. ----------

( ) =Oscillator freq.

( ) =1/2(oscillator

freq.)

LCD duty ---------- ( ) 1/8

( ) 1/4

LCD bias -----------

( ) 1/4

( ) 1/3

P o r t

7 6 5 4 3 2 1 0 7 6 5 4 3 2 1 0

Pull-up

6. Customer code :

Code form ----------- ( ) EPROM

( ) file _______________

Checksum ----------- 9800-9FFF __________H

A000-AFFF __________H

B000-BFFF __________H

9800-BFFF __________H

7. Operating conditions :

All the operating conditions listed below are for Syntek reference. Syntek will not
guaranty on these values. Please refer to data book or contact Syntek for the guaranty
values.

Operating voltage : _____-_____ V Operating frequency : _____ Hz

Operating current : _____ mA Sleep current : _____

�

Others :

Customer : __________________ Salesman : __________________Date : __/__/__

Электронный компонент: STK55C321