DEC. 1998
Ver. 3.0
8-BIT SINGLE-CHIP MICROCONTROLLERS
GMS90 Series
DATA SHEET
Version 3.0
Published by
MCU Application Team
1998 LG Semicon Co., Ltd. All right reserved.
Additional information of this manual may be served by LG Semicon offices in Korea or Distributors and Rep-
resentatives listed at address directory.
LG Semicon reserves the right to make changes to any information here in at any time without notice.
The information, diagrams and other data in this manual are correct and reliable; however, LG Semicon Co.,
Ltd. is in no way responsible for any violations of patents or other rights of the third party generated by the use
of this manual.
GMS90 Series
Dec. 1998 Ver 3.0
Device Naming Structure
GMS90X5X
Frequency
Package Type
Blank:
24:
40:
12MHz
24MHz
40MHz
Blank:
PL:
Q:
40PDIP
44PLCC
44MQFP
ROM Code serial No.
ROM size
1:
2:
4:
4k bytes
8k bytes
16k bytes
6:
8:
24k bytes
32k bytes
Operating Voltage
C:
L:
4.25~5.5V
2.7~3.6V
LG
S
e
mic
o
n MCU
- GBXXX XX XX
GMS97X5X
Frequency
Package Type
Blank:
H:
12/24(5V),12MHz(3V)
33MHz
Blank:
PL:
Q:
40PDIP
44PLCC
44MQFP
ROM size
1:
2:
4:
4k bytes
8k bytes
16k bytes
6:
8:
24k bytes
32k bytes
Operating Voltage
C:
L:
4.25~5.5V
2.7~3.6V
LG
Se
mic
o
n MCU
XX
X
Mask ROM versio
n
OTP version
GMS90 Series
Dec. 1998 Ver 3.0
GMS90 Series Selection Guide
Note: The ROM version products in this data book will be applied to new masking version. (From Dec., 1998)
In case that you have old products, please refer to previous data book (prior to this).
Operating
Voltage (V)
ROM size (bytes)
RAM size
(bytes)
Device Name
Operating
Frequency (MHz)
MASK
OTP
4.25~5.5
ROM-less
128
256
GMS90C31
GMS90C32
12/24/40
12/24/40
4K
8K
16K
24K
32K
-
-
-
-
-
128
256
256
256
256
GMS90C51
GMS90C52
GMS90C54
GMS90C56
GMS90C58
12/24/40
12/24/40
12/24/40
12/24/40
12/24/40
-
-
-
-
-
-
-
-
-
-
4K
4K
8K
8K
16K
16K
24K
24K
32K
32K
128
128
256
256
256
256
256
256
256
256
GMS97C51
GMS97C51H
GMS97C52
GMS97C52H
GMS97C54
GMS97C54H
GMS97C56
GMS97C56H
GMS97C58
GMS97C58H
12/24
33
12/24
33
12/24
33
12/24
33
12/24
33
2.7~3.6
ROM-less
128
256
GMS90L31
GMS90L32
12/16
12/16
4K
8K
16K
24K
32K
-
-
-
-
-
128
256
256
256
256
GMS90L51
GMS90L52
GMS90L54
GMS90L56
GMS90L58
12/16
12/16
12/16
12/16
12/16
-
-
-
-
-
4K
8K
16K
24K
32K
128
256
256
256
256
GMS97L51
GMS97L52
GMS97L54
GMS97L56
GMS97L58
12
12
12
12
12
GMS90 Series
Dec. 1998 Ver 3.0
1
GMS90C31/51, 97C51
GMS90L31/51, 97L51 (Low voltage versions)
Fully compatible to standard MCS-51 microcontroller
Wide operating frequency up to 40MHz (for more detail, see "GMS90 Series Selection Guide")
4K
8 (EP)ROM
128
8 RAM
64K external program memory space
64K external data memory space
Four 8-bit ports
Two 16-bit Timers / Counters
USART
Five interrupt sources, two priority levels
Power saving Idle and power down mode
Quick pulse programming algorithm (in the OTP devices)
2-level program memory lock (in the OTP devices)
2.7Volt low voltage version available
P-DIP-40, P-LCC-44, P-MQFP-44 package
Block Diagram
RAM
128
8
PORT 0
PORT 1
PORT 3
PORT 2
8-BIT
USART
ROM / EPROM
4K
8
CPU
T 0
T 1
I/O
I/O
I/O
I/O
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