GMS90 Hynix Semiconductor, GMS90 Datasheet - Page 6

• Manufacturer Part Number: GMS90
• Description: 8-BIT SINGLE-CHIP MICROCONTROLLERS
• Manufacturer: Hynix Semiconductor

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
• 256
• 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
Block Diagram
2
8 (EP)ROM
8 RAM
T 2
T 0
T 1
ROM / EPROM
256
8K
CPU
RAM
8
8
USART
8-BIT
PORT 0
PORT 1
PORT 2
PORT 3
I/O
I/O
I/O
I/O
Dec. 1998 Ver 3.0
GMS90 Series