STC89C54 PDIP-40

Features:

   Enhanced 80C51 Central Processing Unit ,6T or 12T per machine cycle
Operation voltage range: 5.5V~3.3V (STC89C series)
Operation frequency range: 0- 48MHz@12T, or 0-24MHz@6T
On-chip 61K FLASH program memory with flexible ISP/IAP capability
On-chip 1280 byte RAM
Be capable of addressing up to 64K byte of external RAM
Be capable of addressing up to 64K bytes external memory
Dual Data Pointer (DPTR) to speed up data movement
Three 16-bit timer/counter, Timer 2 is an up/down counter with programmable clcok output on P1.0
8 vector-address, 4 level priority interrupt capability
One enhanced UART with hardware address-recognition, frame-error detection function, and with self

baud- rate generator.
One 15 bits Watch-Dog-Timer with 8-bit pre-scaler (one-time-enabled)
integrate MAX810 — specialized reset circuit
Three power management modes: idle mode and power-down mode
Low EMI: inhibit ALE emission
Power down mode can be woken-up by INT0/P3.2 pin, INT1/P3.3 pin, T0/P3.4, T1/P3.5, RXD/P3.0 pin,

INT2/P4.3, INT3/P4.2
Maximum 39 programmable I/O ports are available
Four 8-bit bi-directonal ports; extra four-bit additional P4 are available for PLCC-44 and QFP-44
Operating temperature: -40 ~ +85°C (industrial) / 0~75°C (commercial)
package type :LQFP-44,PDIP-40,PLCC-44, PQFP44