HMS99C52 Datasheet, PDF (4/43 Pages) Hynix Semiconductor – 8-BIT SINGLE-CHIP MICROCONTROLLERS

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 Timers / Counters
• USART
• Programmable ALE pin enable / disable (Low EMI)
• Five interrupt sources, two priority levels
• Power saving Idle and power down mode
• P-DIP-40, P-LCC-44, P-MQFP-44 package
• Temperature Ranges : -40°C ~ 85°C
Block Diagram
RAM
128 × 8
PORT 0
I/O
T0
PORT 1
I/O
CPU
8-BIT
USART
T1
PORT 2
I/O
FLASH ROM
4K × 8
PORT 3
I/O
0
Jan. 2003 Ver 1.0