MSM85C154 - MSM83C154S Piggy Back - OKI electronic componets
FEATURES
• Operating range
Operating frequency : 1 to 22 MHz (16 to 22 MHz is recommended
for program development)
Operating voltage : 4.75 to 5.25 V (Use MSM85C154VS for 1 to 16
MHz)
Operating temperature : Room temperature
• Fully static circuit
• On-chip program memory : 16K ´ 8-bit ROM (EPROM)
• On-chip data memory : 256 ´ 8-bit RAM
• External program memory address space : 64 Kbytes
• External data memory address space : 64 Kbytes
• I/O port
(Port 1, 2, 3, impedance programmable) : 4 ports ´ 8 bits
• 16-bit timer/counters : 3
• Multifunctional serial port : I/O Expansion mode
: UART mode (featuring error detection)
• 6-source 2-priority level
Interrupt and multi-level
Interrupt available by programming IP and IE registers
• Memory-mapped special function registers
• Bit addressable data memory and SFRs
• Minimum instruction cycle : 545 ns @ 22 MHz operation
• "Multiply"/"divide" instruction cycle : 2.18 ms @ 22 MHz operation
• Standby functions : Power-down mode (oscillator stop)
Activated by software or hardware; providing ports with floating or active status
The software power-down stet mode is terminated by interrupt signal enabling executtion from the interrupted address.
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