Hyundai gms90x54c Manual Do Utilizador

Jan. 2001   Ver 1.0

• Fully compatible to standard MCS-51 microcontroller 

• Wide operating frequency up to 40MHz

(for more detail, see “GMS90X5XC Series Selection Guide”)

• X2 Speed Improvement capability (6 clocks/machine cycle)

20MHz @5V (Equivalent to 40MHz @5V)
8MHz @3V (Equivalent to 16MHz @3V)

• 4K 

×

 8 ROM

• 128 

×

 8 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

• 2.7Volt low voltage version available

• P-DIP-40, P-LCC-44, P-MQFP-44 package

RAM

128 

×

 8

PORT 0

PORT 1

PORT 3

PORT 2

8-BIT

USART

ROM / EPROM

4K 

×

 8

CPU

T 0

T 1

I/O

I/O

I/O

I/O