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 GMS90C32/52, 97C52 GMS90L32/52, 97L52 (Low voltage versions) • Fully compatible to standard MCS-51 microcontroller • Wide operating frequency up to 40MHz (for more detail, see “GMS90 Series Selection Guide”) • 8K × 8 (EP)ROM • 256 × 8 RAM • 64K external program memory space • 64K external data memory space • Four 8-bit ports • Three 16-bit Timers / Counters (Timer2 with up/down counter feature) • USART • Six 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 GMS90C54/56/58, 97C54/56/58 GMS90L54/56/58, 97L54/56/58 (Low voltage versions) • Fully compatible to standard MCS-51 microcontroller • Wide operating frequency up to 40MHz (for more detail, see “GMS90 Series Selection Guide”) • 16K/24K/32K bytes (EP)ROM • 256 × 8 RAM • 64K external program memory space • 64K external data memory space • Four 8-bit ports • Three 16-bit Timers / Counters (Timer2 with up/down counter feature) • USART • One clock output port • Programmable ALE pin enable / disable • Six 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
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