HYNIX GMS34140, GMS34120, GMS34004, GMS34112, GMS34012 Datasheet

4-BIT SINGLE CHIP MICROCOMPUTERS

GMS340 SERIES

USER`S MANUAL

• GMS34004

• GMS34012

• GMS34112

• GMS34120

• GMS34140

• GMS30000 EVA

JUNE. 2001 Rev. 3.0

INTRODUCTION

We hereby introduce the manual for CMOS 4-bit
microcomputer GMS340 Series.
This manual is prepared for the users who should
understand fully the functions and features of
GMS340 Series so that you can utilize this
product to its fullest capacity. A detailed explana­tions of the specifications and applications regard­ing the hardware is hereby provided.

The contents of this user`s manual are subject to
change for the reasons of later improvement of
the features.
The information, diag ram s, a nd other data in this
user`s manual are correct and reliable; however,
HYNIX Semicond uctor Inc. is in no way res ponsible
for any violations of patents or other rights of
the third party generated by the use of this
manual

Table of Contents

Table of Conten ts

Chapter 1

Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1

Outline of Characteristics . . . . . . . . . . . . . . . . . . . . . 1-1

Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2

Pin Assignment and Dimension . . . . . . . . . . . . . . . . . . . . 1-3

I/O circuit types and options . . . . . . . . . . . . . . . . . . . . . . . 1-7

Electrical Characteristics of GMS300 Series . . . . . . . . . . 1-10

Chapter 2

Architecture . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1

Block Description . . . . . . . . . . . . . . . . . . . . . . . . . . .. . .. . . 2-1

Program Memory (ROM). . . . . . . . . . . . . . . . . . . . . . . . . 2-1

ROM Address Register . . . . . . . . . . . . . . . . . . . . . . . . . 2-2

Data Me m o ry (RAM) . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-3

X-Register (X) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-3

Y-Register (Y) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-4

Accumulator (Acc) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-4

State Counter (SC) . . . . . . . . . . . .. . . . . . . . . . . . . . . . . 2-5

Clock Ge nerato r . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-6

Pulse Generator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-7

Initial Reset Circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-8

Internal Power On Reset . . . . . . . . . . . . . . . . . . . . . . . . 2-8

Watch Dog Timer (WDT) . . . . . . . . . . . . . . . . . . . . . . . . 2-8

Stop Function . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-10

Maske d Op tions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-10

Chapter 3

Instruction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1

Instruction format . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1

Instruction Table . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-2

Details of Instruction System . . . . . . . . . . . . . . . . . . . . 3-5

Detailed Description . . . . . . . . . . . . . . . . . . . . . . . 3-6

Table of Contents

Chapter 4

Evaluation Board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1

Outline . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1

Product Specification . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1

Connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-2

Optional Setting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-3

Caution of Operation . . . . . . . . . . . . . . . . . . . . . .. . . . . 4-6

Chapter 5

Software . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-1

Configuration of Assembler . . . . . . . . . . . . . . . . . . . . . . 5-1

Booting up Assembler . . . . . . . . . . . . . . . . . . . . . . . . . 5-1

Configuration of Simulator . . . . . . . . . . . . . . . . . . . . . . . 5-2

Booting up Simulator . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-2

Simulator commands . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-15

Description of commands . . . . . . . . . . . . . . . . . . . . . . . . 5-18

File typ es used in th e simulato r . . . . . . . . . . . . . . . . . . . 5-48

Error message and troubleshooting . . . . . . . . . . . . . . . . 5-49

Appendix

Mask option list

INTRODUCTION 1

ARCHITECTURE 2

INSTRUCTION 3

EVALUATION BOARD 4

SOFTWARE 5

APPENDIX 6

1 - 1

CHAPTER 1. Introduction

OUTLINE OF CHARACTERISTICS

The GMS340 series are remote contol transmitter which uses CMOS technology.
This enables transmission code outputs of different configurations, multiple custom
code output, and double push key output for easy fabrication.
The GMS340 sereis are suitable for remote control of TV, VCR, FANS, Air­conditioners, Audio Equipments, Toys and Games etc.

Characteristics

¡Ü Program memory : 512 bytes for GMS34004/012

1024 bytes for GMS34112/120/140

¡Ü Data memory : 32

¡¿

4 bits

¡Ü 43 types of instruction set
¡Ü 3 levels of subroutine nesting
¡Ü 1 bit output port for a large current (REMOUT signal)
¡Ü Operating frequency : 300~500KHz or 2.4~4MHz for 300~500KHz operation

(Masked option)

¡Ü Instruction cycle : f

OSC

/6 (at 300~500KHz)

f

OSC

/48 (at 2.4~4MHz)

¡Ü CMOS process (Single 3.0V power supply)
¡Ü Stop mode (Through internal instruction)
¡Ü Released stop mode by key input (Masked option)
¡Ü Built in capacitor for ceramic oscillation circuit (Masked option)
¡Ü Built in a watch dog timer (WDT)
¡Ü Low operating voltage : 2.0~4.0V (at 300~500KHz)

2.2~4.0V (at 2.4~4MHz)

Series

Program memory
Data memory
I/O ports

Input ports

Output ports

Package

GMS34004

512

32 ¡¿ 4

-

4
6

D0 ~ D5

16DIP/SOP

GMS34012

¡ç
¡ç

4

¡ç

6

D0 ~ D5

20DIP/SOP

GMS34112

1024

¡ç
¡ç

¡ç

6

D0 ~ D5

¡ç

GMS34120

¡ç
¡ç
¡ç

¡ç

8

D0 ~ D7

24DIP/SOP

GMS34140

¡ç
¡ç
¡ç

¡ç

10

D0 ~ D9

¡ç

Table 1-1 GMS340 series members

Chapter 1. Introduction

1 - 2

Block Diagram

RAM

16word x

2page x 4bit

RAM
Word

Selector

Y-Reg

ACC

ST

R-Latch D-Latch

Pluse

Generator

X-Reg

MUX

MUX

ALU

23 22 7 8 9 4 2110 3 5 6 11 12 13 14 15 16 17 18 19 20

Instruction

Decoder

Program counter

Stack

Reset

Watchdog

timer

1 24

2

10

10

8

ROM

64word ¡¿

16page

¡¿

8bit

8

4

4

2

4 10

4

10

4

4

4

16

4

4

4

4

4

OSC1 OSC2 K0 ~ K3 R0 ~ R3 D0 ~ D9 REMOUT

RESET VDD GND

OSC

Fig 1-1 Block Diagram (In case of GMS34140)

Chapter 1. Introduction

Control Signal

1 - 3

Pin Assignment and terminals

Pin Assignment

2 23
3 22
4 21
5 20
6 19
7 18
8 17
9 16
10 15
11 14
12 13

1 24

VDD
OSC1

OSC2
REMOUT

D7
D6
D5
D4
D3
D2
D1
NC

RESET

GND

R0
R1
R2
R3
K0
K1
K2
K3
D0

NC

Fig 1-2 GMS34004 Pin Assignment Fig 1-3 GMS34012/112 Pin Assignment

Fig 1-5 GMS34120 Pin Assignment

Chapter 1. Introduction

2 15
3 14
4 13
5 12
6 11
7 10
8 9

1 16

VDD
OSC1

OSC2
REMOUT

D5
D4
D3
D2

RESET

GND

K0
K1
K2
K3
D0
D1

2 19
3 18
4 17
5 16
6 15
7 14
8 13
9 12
10 11

1 20

R3
R2

R1
R0

GND
RESET
VDD
OSC1
OSC2
REMOUT

K0
K1

K2
K3
D0
D1
D2
D3
D4
D5

2 23
3 22
4 21
5 20
6 19
7 18
8 17
9 16
10 15
11 14
12 13

1 24

VDD
OSC1

OSC2
REMOUT

D7
D6
D5
D4
D3
D2
D1
D9

RESET

GND

R0
R1
R2
R3
K0
K1
K2
K3
D0
D8

Fig 1-6 GMS34140 Pin Assignment

1 - 4

Chapter 1. Introduction

Pin Dimension

1 2 3 4 5 6 7 8

16 15 14 13 12 11 10 9

0.785MAX

0.745MIN

0.040MAX

0.020MIN

0.065MAX

0.015MIN

0.140MAX

0.120MIN

¡æ ¡ç

¡æ ¡ç

0~15¡Ç

0.280MAX

0.240MIN

0.300BSC

0.014MAX

0.008MIN

Outline (Unit:Inch)

0.050MIN

0.022MAX

0.015MIN

0.100BSC

Fig 1-7 16PDIP Pin Dimension

0.125MIN

0.135MAX

0.170MAX

Outline (Unit : Inch)

0.392MAX

0.386MIN

0.050BSC

0.0200MAX

0.0098MAX

0.0040MIN

1 2 3 4 5 6 7 8

16 15 14 13 12 11 10 9

0.0688MAX

0.0600MIN

¡æ
¡ç

¡æ

¡ç

0.157MAX

0.150MIN

0.244MAX

0.035MAX

0.016MIN

0.230MIN

0 ~ 8

¡Ç

¡æ
¡ç

0.0098MAX

0.0075MIN

Fig 1-8 16SOP Pin Dimension (150Mil)

Base Plane

Seating Plane

1 - 5

1 2 3 4 5 6 7 8 9 10

20 19 18 17 16 15 14 13 12 11

0.984MAX

0.968MIN

0.065MAX

0.055MIN

0.022MAX

0.015MIN

0.1TYP

0.170MAX

0.015MIN

0.135MAX

0.125MIN

¡æ ¡ç

¡æ ¡ç

0~15¡Ç

0.270MAX

0.250MIN

0.3TYP

0.012MAX

0.008MIN

Outline (Unit : Inch)

Fig 1-10 20PDIP Pin Dimension

0.5118MAX

0.4961MIN

0.020MAX

0.014MIN

0.05TYP

0.0118MAX

0.004MIN

1 2 3 4 5 6 7 8 9 10

20 19 1 8 17 16 15 14 13 12 11

¡æ
¡ç

¡æ

¡ç

0.299MAX

0.292MIN

0.419MAX

0.125MAX

0.0091MIN

0.104MAX

0.093MIN

0.042MAX

0.016MIN

Outline (Unit : Inch)

0.398MIN

Fig 1-11 20SOP Pin Dimension

Chapter 1. Introduction

1 - 6

1 2 3 4 5 6 7 8 9 10 11

12

24 23 22 21 20 19 18 17 16 15 14

13

1.255MAX

1.245MIN

0.065MAX

0.055MIN

0.022MAX

0.015MIN

0.1TYP

0.170MAX

0.015MIN

0.135MAX

0.125MIN

¡æ ¡ç

¡æ ¡ç

0~15¡Ç

0.270MAX

0.250MIN

0.3TYP

0.012MAX

0.008MIN

Outline (Unit : Inch)

Fig 1-12 24PDIP Pin Dimension

0.618MAX

0.595MIN

0.020MAX

0.014MIN

0.05TYP

0.018MAX

0.004MIN

1 2 3 4 5 6 7 8 9 10 11 12

24 23 22 21 20 19 18 17 16 15 14

13

¡æ
¡ç

¡æ

¡ç

0.299MAX

0.292MIN

0.419MAX

0.125MAX

0.0091MIN

0.104MAX

0.093MIN

0.042MAX

0.016MIN

Outline (Unit : Inch)

0.396MIN

Fig 1-13 24SOP Pin Dimension

Chapter 1. Introduction

1 - 7

Pin Function

I/O circuit types and options

GMS340 series I/O port types

I/O

Connected to 2.0~4.0V power supply.
Connected to 0V power supply.
Used to input a manual reset. When the pin goes ¡ÈL¡È, the

D-output ports and REMOUT-output port are initialized to

¡ÈL¡È

, and ROM address is set to address 0 on page 0.

4-bit input port.
Released STOP mode built in pull-up resistor by each pin as
masked option.
(It is released by ¡ÈL¡È input at STOP)

Each can be set and reset independently. The output is in
the form of N-channel-open-drain.

4-bit I/O port. (Input mode is set only when each of them
output ¡ÈH¡È.)
In outputting, each can be set and reset independently(or at
once.)
The output is in the form of N-channel-open-drain.
Pull-up resistor and STOP release mode can be respectively
selected as masked option for each bit. (It is released by

¡ÈL¡È

input at STOP.)

High current output port.
The output is in the form of C-MOS.
The state of large current on is ¡ÈH¡È.

Oscillator input. Input to the oscillator circuit and connection
point for ceramic resonator.
Internal capacitors available as masked option.
A feedback resistor is connected between this pin and OSC2

Connect a ceramic resonator between this pin and OSC1.

V

DD

GND

RESET

K0~K3

D0~D9

R0~R3

REMOUT

OSC1

OSC2

Input

Input

Output

I/O

Output

Input

Output

-

-

Chapter 1. Introduction

1 - 8

I/O circuit types and options

Hysteresis Input Type
Built in pull-up­resistor Typical 400

§Ú

(option)
Built in pull-up
resistor
Typical 800

§Ú

Reset I

Pin I/O Note

¡æ
¡ç

¡æ
¡ç

Open drain output

¡ÈH¡È

output at reset

(Option)
Built in MOS Tr for
pull-up About 120

§Ú

R0~R3 I/O

Built in MOS Tr for
pull-up About 120

§Ú

K0~K3 I

Open drain output

¡ÈL¡È

output at reset

D0~D9

O

¡æ
¡ç

CMOS output

¡ÈL¡È

output at reset
High current source
output

REMOUT O

I/O circuit

Chapter 1. Introduction

¡æ
¡ç

¡æ

¡æ

¡ç

¡æ
¡ç

¡æ

1 - 9

Built in feedback­Resister About 1

§Û

OSC2 O

Pin I/O Note

(Option)
Built in resonance
Capacitor
C1/C2 = 100pF

¡¾

N%
[C1/C2 are not
available for MHz
operation]

OSC1 I

I/O circuit

¡æ

¡ç

¡æ

¡ç

¡è
¡è

OSC2

Rd

C2

Rf

C1

OSC1

OSCSTB

Built in dumping-Resister
[No resistor in MHz
operation]

: Masked option

Chapter 1. Introduction

*. Recommendable circuit

Frequency Resonator Maker Part Name Load Capacitor Operating Voltage

455KHz

Murata CSB455E C1=C2=Open 2.0 ~ 4.0V

Kyocera KBR-455BKTL70 C1=C2=Open 2.0 ~ 4.0V

OSC1

C1

C2

OSC2

TDK FCR455K3 C1=C2=Open 2.0 ~ 4.0V

CSB480E C1=C2=Open 2.0 ~ 4.0V

TDK FCR480K3 C1=C2=Open 2.0 ~ 4.0V

480KHz

Murata

3.64MHz

Murata CSA3.64MG C1=C2=30pF 2.2 ~ 4.0V
Murata CST3.64MGW C1=C2=Open 2.2 ~ 4.0V

TDK FCR3.64MC5 C1=C2=Open 2.2 ~ 4.0V

3.84MHz

Murata CSA3.84MG C1=C2=30pF 2.2 ~ 4.0V
Murata CST3.84MGW C1=C2=Open 2.2 ~ 4.0V

TDK FCR3.84MC5 C1=C2=Open 2.2 ~ 4.0V

¡Ø

CST type is building in load capacitior

1 - 10

Parameter

Supply Voltage
Power dissipation
Storage temperature range

Input voltage
Output voltage

Unit

V

mW

¡É

V
V

Electrical Characteristics for GMS300 series

Absolute maximum ratings (Ta = 25¡É)

Symbol

V

DD

P

D

Tstg

V

IN

V

OUT

Max. rating

-0.3 ~ 5.0
700

¡É

-55 ~ 125

-0.3 ~ VDD+0.3

-0.3 ~ VDD+0.3

* Thermal derating above 25¡É : 6mW per degree ¡É rise in temperature.

Parameter

Supply Voltage

Operating temperature

Unit

V

¡É

Recommended operation condition

Rating

2.0 ~ 4.0

2.2 ~ 4.0

-20 ~ +70

Chapter 1. Introduction

Condition

300 ~ 500KHz

2.4 ~ 4MHz

-

Symbol

V

DD

Topr

1 - 11

Parameter

Electrical characteristics (Ta=25Î, VDD=3V)

Symbol

Limits

Unit Condition

Chapter 1. Introduction

f

OSC

/6

f

OSC

/48 f

OSC

Input H current

RESET input L current

K, R input L current

K, R input H voltage

RESET in p ut H voltage
RESET input L voltage
D. R output L voltage

REMOUT output L voltage

REMOUT output H current
OSC2 output L voltage

OSC2 output H voltage
D, R output leak age

current
Current on STOP mode
Operating supply current 1

Operating supply current 2
System

clock
frequency

K, R input L voltag e

f

OSC

I

DD2

*2

I

DD1

*2

I

STOP

I

OL

V

OH3

V

OL3

I

OH1

*1

V

OL2

V

IL2

V

IH2

V

IL1

V

IH1

I

IL1

I

IL2

I

IH

V

OL1

2.4

300

-

-

-

-

2.1

-

-32

-

-

2.25

-

2.1

-9

-2

-

-

-

-

0.5

0.3

-

-

2.5

0.4

-23

0.15

-

-

-

-

-25

-7.5

-

0.15

Min. Typ. Max.

4

500

1.5

1.0

1

1

-

0.9

-17

0.4

0.75

-

0.9

-

-50

-16

1

0.4

MHz

KHz

mA

mA

uA

uA

V

V

mA

V

V

V

V

V

uA

uA

uA

V

f

OSC

=4MHz

f

OSC

=455KHz

At STOP mode

V

0=VDD

, Output off

I

OH

=70uA

I

OL

=70uA

V

OH1

=0V

I

OL

=1mA

V

-

-

-

VI=GND, Output
off, Pull-Up resistor
provided.

VI=GND

VI=V

DD

IOL=100uA

*1 Refer to

¹

Fig.1-14 I

OH1

vs. V

OH1

Graph

º

*2 I

DD1

, I

DD2

, is measured at RESET mode.

1 - 12

Chapter 1. Introduction

Fig 1-14. I

OH1

vs V

OH1

Graph (REMOUT Port)

OVW

OVR

OUW

OUR

OTW

OTR

OSW

OSR

OW

R

RPR RPW SPR SPW TPR TPW UPR UPW VPR

xqjS JxK

kq j S J

c

xee _ TPRx

xee _ UPRx

xee _ VPRx

v _ TW

Î

INTRODUCTION 1

ARCHITECTURE 2

INSTRUCTION 3

EVALUATION BOARD 4

SOFTWARE 5

APPENDIX 6

2 - 1

CHAPTER 2. Architecture

BLOCK DESCRIPTION

Characteristics

The GMS340 series can incorporate maximum 1024 words (64 words ¡¿ 16
pages ¡¿ 8bits) for program memory. Program counter PC (A0~A5) and page
address register (A6~A9) are used to address the whole area of program
memory having an instruction (8bits) to be next executed.
The program memory consists of 64 words on each page, and thus each page
can hold up to 64 steps of instructions.
The program memory is composed as shown below.

0

1

2

3

4

5

6

7

8

63

Program counter (PC) Page address register (PA) Page buffer (PB)

6 4

(Level ¡È1¡È)

(Level ¡È2¡È)

(Level ¡È3¡È)(PRS)(SR)

Stack register

Page 0 Page 1 Page 2 Page 15

A0~A5

0 1 2 15

A6~A9

Program capacity (pages)

Fig 2-1 Configuration of Program Memory

Chapter 2. Architecture

2 - 2

ROM Address Register

The following registers are used to address the ROM.

• Page address register (PA) :
Holds ROM`s page number (0~Fh) to be addressed.

• Page buffer register (PB) :
Value of PB is loaded by an LPBI command when newly addressing a page.
Then it is shifted into the PA when rightly executing a branch instruction (BR)
and a subroutine call (CAL).

• Program counter (PC) :
Available for addressing word on each page.

• Stack register (SR) :
Stores returned-word address in the subroutine call mode.

(1) Page address register and page buffer register :

Address one of pages #0 to #15 in the ROM by the 4-bit binary counter.
Unlike the program counter, the page address register is usually unchanged

so that the program will repeat on the same page unless a page changing
command is issued. To change the page address, take two steps such as
(1) writing in the page buffer what page to jump to (execution of LPBI) and
(2) execution of BR or CAL, because and instruction code is of eight bits so
that page and word cannot be specified at the same time.
In case a return instruction (RTN) is executed within the subroutine that has
been called in the other page, the page address will be changed at the
same time.

(2) Program counter :

This 6-bit binary counter increments for each fetch to address a word in the
currently addressed page having an instruction to be next executed.
For easier programming, at turning on the power, the program counter is
reset to the zero location. The PA is also set to ¡È0¡È. Then the program
counter specifies the next ROM address in random sequence.
When BR, CAL or RTN instructions are decoded, the switches on each step
are turned off not to update the address. Then, for BR or CAL, address
data are taken in from the instruction operands (a0 to a5), or for RTN, and
address is fetched from stack register No. 1.

(3) Stack register :

This stack register provides two stages each for the program counter (6
bits) and the page address register (4bits) so that subroutine nesting can be
mode on two levels.

Chapter 2. Architecture

2 - 3

Data memory (RAM)

Up to 32 nibbles (16 words ¡¿ 2pages ¡¿ 4bits) is incorporated for storing data.
The whole data memory area is indirectly specified by a data pointer (X,Y). Page
number is specified by zero bit of X register, and words in the page by 4 bits in
Y-register. Data memory is composed in 16 nibbles/page. Figure 2.2 shows the
configuration.

0

1

2

3

15

Output port

Y-register (Y) X-register (X)

D0 D9 R0 R3 REMOUT

Page 0 Page 1

0 14 A0~A3

Data memory page (0~1)

X-register (X)

X-register is consist of 2bit, X0 is a data pointer of page in the RAM, X1 is only
used for selecting of D8~D9 with value of Y-register

Fig 2-2 Composition of Data Memory

X1=1X1=0

D8
D9

Y=0
Y=1 D1

D0

Table 2-1 Mapping table between X and Y register

Chapter 2. Architecture

4 2

2 - 4

Y-register (Y)

Y-register has 4 bits. It operates as a data pointer or a general-purpose register.
Y-register specifies and address (a0~a3) in a page of data memory, as well as it
is used to specify an output port. Further it is used to specify a mode of carrier
signal outputted from the REMOUT port. It can also be treated as a general­purpose register on a program.

Accumulator (ACC)

The 4-bit register for holding data and calculation results.

Arithmetic and Logic Unit (ALU)

In this unit, 4bits of adder/comparator are connected in parallel as it`s main
components and they are combined with status latch and status logic (flag.)

(1) Operation circuit (ALU) :

The adder/comparator serves fundamentally for full addition and data
comparison. It executes subtraction by making a complement by processing
an inversed output of ACC (ACC+1)

(2) Status logic :

This is to bring an ST, or flag to control the flow of a program. It occurs when
a specified instruction is executed in two cases such as overflow in operation
and two inputs unequal.

Chapter 2. Architecture

2 - 5

State Counter (SC)

A fundamental machine cycle timing chart is shown below. Every instruction is
one byte length. Its execution time is the same. Execution of one instruction
takes 6 clocks for fetch cycle and 6 clocks for execute cycle (12 clocks in total).
Virtually these two cycles proceed simultaneously, and thus it is apparently
completed in 6 clocks (one machine cycle). Exceptionally BR, CAL and RTN
instructions is normal execution time since they change an addressing
sequencially. Therefore, the next instruction is prefetched so that its execution
is completed within the fetch cycle.

T1 T2 T3 T4 T5 T6 T1 T2 T3 T4 T5 T6

Fetch cycle N

Execute cycle N-1

Execute cycle N

Fetch cycle N-1

Machine

Cycle

Machine

Cycle

Phase

¥°

Phase

¥±

Phase

¥²

Fig. 2-3 Fundamental timing chart

Chapter 2. Architecture

2 - 6

Clock Generator

The GMS340 series has an internal clock oscillator. The oscillator circuit is
designed to operate with an external ceramic resonator. Internal capacitors are
available as a masked option. Oscillator circuit is able to organize by connecting
ceramic resonator to outside. (In order to built in capacitor for oscillation as
masked option.)
* It is necessary to connect capacitor to outside in order to change ceramic
resonator, You must examine refer to a manufacturer`s

OSC1 OSC2

C1 C2

<Circuit 1>

23 22

OSC1 OSC2

<Circuit 2>

23 22

Oscillation Circuit

Operating Frequency

Circuit 1
Circuit 2

f

OSC

= 2.4 ~ 4MHz

f

OSC

= 300 ~ 500KHz

Internal capacitor option

No Internal capacitor option Circuit 1

Chapter 2. Architecture

2 - 7

Pulse generator

The following frequency and duty ratio are selected for carrier signal outputted
from the REMOUT port depending on a PMR (Pulse Mode Register) value set in
a program.

T

T1

REMOUT signal

T=1/f

PUL

= 12/f

OSC

[96/f

OSC

], T1/T = 1/20

1

PMR

2
3
4
5

T=1/f

PUL

= 12/f

OSC

[96/f

OSC

], T1/T = 1/3

T=1/f

PUL

= 8/f

OSC

[64/f

OSC

], T1/T = 1/2

T=1/f

PUL

= 8/f

OSC

[64/f

OSC

], T1/T = 1/4

T=1/f

PUL

= 11/f

OSC

[88/f

OSC

], T1/T = 4/11

No Pulse (same to D0~D9)

* Default value is ¡È0

¡È

* [ ] means the value of ¡ÈT¡È, when Instruction cycle is f

OSC

/48

Table 2-2 PMR selection table

6 T=1/f

PUL

= 12/f

OSC

[96/f

OSC

], T1/T = 1/4

Chapter 2. Architecture

2 - 8

Initial Reset Circuit

RESET pin must be down to ¡ÈL¡È more than 4 machine cycle by outside
capacitor or other for power on reset.
The mean of 1 machine cycle is below. 1 machine cycle is 6/f

OSC

, however,
operating voltage must be in recommended operating conditions, and clock
oscillating stability.
* It is required to adjust C value depending on rising time of power supply.

(Example shows the case of rising time shorter than 10ms.)

1

RESET

0.1uF

Chapter 2. Architecture

Watch Dog Timer (WDT)

Watch dog timer is organized binary of 14 steps. By the selected oscillation
option, the signal of f

OSC

/6 cycle comes in the first step of WDT. If this counter
was overflowed, come out reset signal automatically, internal circuit is initialized.
The overflow time is 6¡¿2 13/f

OSC

(108.026ms at f

OSC

=455KHz.)

8¡¿6¡¿213/f

OSC

(108.026ms at f

OSC

= 3.64MHz)
Normally, the binary counter must be reset before the overflow by using reset
instruction (WDTR) or / and REMOUT port (Y-reg=8, So instruction execution) at
masked option.

* It is constantly reset in STOP mode. When STOP is released, counting is
restarted. (Refer to 2-10 STOP function>)

Binary counter
(14 steps)
RESET (edge-trigger)

f

OSC

/6 or f

OSC

/48

CPU reset

Reset
by instruction

REMOUT
output

Mask Option

2 - 9

STOP Function

Stop mode can be achieved by STOP instructions.
In stop mode :

1. Oscillator is stopped, the operating current is low.

2. Watch dog timer is reset, D8~D9 output and REMOUT output are ¡ÈL¡È.

3. Part other than WDT, D8~D9 output and REMOUT output have a value before
come into stop mode.

¡ÈBut, the state of D0~D7 output in stop mode is able to choose as masked
option. ¡ÈL¡È output or same level before come into stop mode.

The function to release stop mode is able to choose each bit of K or R input.
Stop mode is released when one of K or R input is going to ¡ÈL¡È.

1. State of D0~D7 output and REMOUT output is return to state of before stop mode
is achieved.

2. After 1024¡¿8 enable clocks for stable oscillating. First instruction start to operate.

3. In return to normal operation, WDT is counted from zero again.

But, at executing stop instruction, if one of K or R input is chosen to ¡ÈL¡È, stop
instruction is same to NOP instruction.

Masked options

The GMS340 series offer the following optional features.
These options are masked.

1. Watch dog timer reset by REMOUT output signal.

2. Input terminals having STOP release mode : K0~K3, R0~R3.

3. I/O terminals having pull-up resistor : R0~R3

4. Ceramic oscillation circuit contained (or not contained).
[This option is not available for MHz Ceramic oscillator]

5. Output form at stop mode

D0~D7 : ¡ÈL¡È or keep before stop mode

6. Instruction cycle selection:
T=48/f

OSC

or T=6/f

OSC

Chapter 2. Architecture

INTRODUCTION 1

ARCHITECTURE 2

INSTRUCTION 3

EVALUATION BOARD 4

SOFTWARE 5

APPENDIX 6

3 - 1

Chapter 3. Instruction

CHAPTER 3. Instruction

INSTRUCTION FORMAT

All of the 43 instruction in GMS340 series is format in two fields of OP code and
operand which consist of eight bits. The following formats are available with
different types of operands.

Format

¥°

All eight bits are for OP code without operand.

Format

¥±

Two bits are for operand and six bits for OP code.
Two bits of operand are used for specifying bits of RAM and X-register (bit 1 and
bit 7 are fixed at ¡È0¡È)

Format

¥²

Four bits are for operand and the others are OP code.
Four bits of operand are used for specifying a constant loaded in RAM or Y­register, a comparison value of compare command, or page addressing in ROM.

Format

¥³

Six bits are for operand and the others are OP code.
Six bits of operand are used for word addressing in the ROM.

3 - 2

INSTRUCTION TABLE

The GMS340 series provides the following 43 basic instructions.

Category

1
2
3

Register to

Register

LAY
LYA
LAZ

Mnemonic

A ¡ç Y

Function

Y ¡ç A
A ¡ç 0

S
S
S

ST

*1

4
5
6

RAM to

Register

LMA

LMAIY

LYM

M(X,Y) ¡ç A
M(X,Y) ¡ç A, Y ¡ç Y+1
Y ¡ç M(X,Y)

S
S

S
7
8

LAM

XMA

A ¡ç M(X,Y)
A ¡ê M(X,Y)

S

S
9

10
11

Immediate

LYI i

LMIIY i

LXI n

Y ¡ç i
M(X,Y) ¡ç i, Y ¡ç Y+1
X ¡ç n

S

S

S

12
13
14

RAM Bit

Manipulation

SEM n

REM n

TM n

M(n) ¡ç 1
M(n) ¡ç 0
TEST M(n) = 1

S

S

E

15
16
17

ROM

Address

BR a

CAL a

RTN

if ST = 1 then Branch
if ST = 1 then Subroutine call
Return from Subroutine

S

S

S

18 LPBI i PB ¡ç i S
19
20
21

Arithmetic

AM
SM

IM

A ¡ç A + M(X,Y)
A ¡ç M(X,Y) - A
A ¡ç M(X,Y) + 1

C

B

C

22
23

DM

IA

A ¡ç M(X,Y) - 1
A ¡ç A + 1

B

S

24
25

IY

DA

Y ¡ç Y + 1
A ¡ç A - 1

C

B

Chapter 3. Instruction