S87C552单片机解密

0 次 时间：2009-08-27 / 01:49:32 来源：夏生

S87C552 FEATURES：

• 80C51 central processing unit
• 8k × 8 ROM expandable externally to 64k
bytes
• ROM code protection
• An additional 16-bit timer/counter coupled
to four capture registers and three compare
registers
• Two standard 16-bit timer/counters
• 256 × 8 RAM, expandable externally to 64k
bytes
• Capable of producing eight synchronized,
timed outputs
• A 10-bit ADC with eight multiplexed analog
inputs
• Two 8-bit resolution, pulse width
modulation outputs
• Five 8-bit I/O ports plus one 8-bit input port
shared with analog inputs
• I2C-bus serial I/O port with byte oriented
master and slave functions
• Full-duplex UART compatible with the
standard 80C51
• On-chip watchdog timer
• Three speed ranges:
– 3.5 to 16MHz
– 3.5 to 24MHz (ROM, ROMless only)
– 3.5 to 30MHz (ROM, ROMless only)
• Three operating ambient temperature
ranges:
– P83C552xBx: 0°C to +70°C
– P83C552xFx: –40°C to +85°C
(XTAL frequency max. 24 MHz)
– P83C552xHx: –40°C to +125°C
(XTAL frequency max. 16 MHz)