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