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-51TM instruction set and pinout. The Hynix semiconductor 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.

Features
■ Compatible with MCS-51TM 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 Operatig 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