8-Bit CMOS Microcontorller
GMS97C2051/L2051
Features
Compatible with MCS-51 Products
2 Kbytes of programmable EPROM
4.25V to 5.5V Operating Range (GMS97C2051)
2.70V to 3.6V Operating Range (GMS97L2051)
Version for 12MHz / 24 MHz Operating frequency (GMS97C2051)
Only 12MHz Operating frequency (GMS97L2051)
Two-Level Program Memory Lock with encryption array
128 bytes SRAM
15 Programmable I/O Lines
Two 16-Bit Timer/Counters
Programmable serial USART
Five Interrupt Sources
Direct LED Drive Outputs
On-Chip Analog Comparator
Low Power Idle and Power Down Modes
TM
Description
The GMS97C2051/L2051 is a high-performance CMOS 8-bit microcontroller with 2Kbytes of programmable
EPROM. The device is compatible with the industry standard MCS-51
TM
instruction set and pinout. The HYUN-
DAI MicroElectronics GMS97C2051/L2051 is a powerful microcontroller which provides a highly flexible and
cost effective solution to many embedded control applications. The GMS97C2051/L2051 provides the following
standard features: 2Kbytes of EPROM, 128 bytes of RAM, 15 I/O lines, two 16-bit timer/counters, a five vector
two-level interrupt architecture, a full duplex serial port, a precision analog comparator, on-chip oscillator and
clock circuitry. In addition, the GMS97C2051/L2051 supports two software selectable power saving modes. The
Idle Mode stops the CPU while allowing the RAM, timer/counters, serial port and interrupt system to continue
functioning. The Power Down Mode saves the RAM contents but freezes the oscillator disabling all other chip
functions until the next hardware reset.
Pin Configuration
PDIP/SOP
RST
(RXD) P3.0
(TXD) P3.1
XTAL2
XTAL1
(
INT0
)P3.2
(
INT1
) P3.3
(T0) P3.4
(T1) P3.5
GND
1
2
3
4
5
6
7
8
9
10
20
19
18
17
16
15
14
13
12
11
VCC
P1.7
P1.6
P1.5
P1.4
P1.3
P1.2
P1.1 (AIN1)
P1.0 (AIN0)
P3.7
1
HYUNDAI MicroElectonics
HYNIX [ HYNIX SEMICONDUCTOR ]
