HMS99C51

HYNIX SEMICONDUCTOR INC. 8-BIT SINGLE-CHIP MICROCONTROLLERS HMS99C51 HMS99C52 User’s Manual (Ver. 1.0) Version 1.0 Published by MCU Application Team 2002 Hynix semiconductor All right reserved. Additional information of this manual may be served by Hynix semiconductor offices in Korea or Distributors and Representatives listed at address directory. Hynix semiconductor reserves the right to make changes to any information here in at any time without notice. The information, diagrams and other data in this manual are correct and reliable; however, Hynix semiconductor is in no way responsible for any violations of patents or other rights of the third party generated by the use of this manual. Device Naming Structure HMS99X5X XX Hynix semiconductor MCU FLASH version Package Type Blank: 40PDIP PL: 44PLCC Q: 44MQFP ROM size 1: 4k bytes 2: 8k bytes Operating Voltage C: 4.5~5.5V HMS99C5X Series Selection Guide Operating Voltage (V) 4.5~5.5 ROM size (bytes) FLASH 4K 8K RAM size (bytes) 128 256 Device Name HMS99C51 HMS99C52 Operating Frequency (MHz) 40 40 HMS99C5X Series HMS99C51 Fully compatible to standard MCS-51 microcontroller Wide operating frequency up to 40MHz (for more detail, see “HMS99C5X Series Selection Guide”) X2 Speed Improvement capability ( X2 Mode : 6 clocks/machine cycle) 20MHz @5V (Equivalent to 40MHz @5V) 4K bytes FLASH ROM 128 × 8Bit RAM 64K external program memory space 64K external data memory space Four 8-bit ports Two 16-bit Ti...