S87C654-7N40
CMOS single-chip 8-bit microcontroller
FEATURES
• 80C51 central processing unit
• 16k × 8 ROM expandable externally to
64k bytes
• 256 × 8 RAM, expandable externally to
64k bytes
• Two standard 16-bit timer/counters
• Four 8-bit I/O ports
• I2C-bus serial I/O port with byte oriented
master and slave functions
• Full-duplex UART facilities
• Power control modes
– Idle mode
– Power-down mode
• ROM code protection
• Extended frequency range: 3.5 to 24 MHz
• Three operating ambient temperature
ranges:
0 to +70°C
–40 to +85°C
–40 to +125°C
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