Description
The GMS97C1051/L1051 is a high-performance CMOS 8-bit microcontroller with 1Kbytes of programmable EPROM. The device is compatible with the industry standard MCS-51TM instruction set and pinout. The Hynix semiconductor GMS97C1051/L1051 is a powerful microcontroller which provides a highly flexible and cost effective solution to many embedded control applications. The GMS97C1051/L1051 provides the follow ing standard features: 1Kbytes of EPROM, 64 bytes of RAM, 15 I/O lines, 16-bit timer/counter, a three vector two-level interrupt architecture, a precision analog comparator, on-chip oscillator and clock circuitry. In addition, the GMS97C1051/L1051 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
■ 1 Kbytes of programmable EPROM
■ 4.25V to 5.5V Operating Range (GMS97C1051)
   2.70V to 3.6V Operating Range (GMS97L1051)
■ Version for 12MHz / 24 MHz Operating frequency (GMS97C1051)
   Only 12MHz Operating frequency (GMS97L1051)
■ Two-Level Program Memory Lock with encryption array
■ 64 bytes SRAM
■ 15 Programmable I/O Lines
■ One 16-Bit Timer/Counter
■ Three Interrupt Sources
■ Direct LED Drive Outputs
■ On-Chip Analog Comparator
■ Low Power Idle and Power Down Modes