Features: ‧ Only 47 single word instructions
‧ All instructions are single cycle except for program branches which are two-cycle
‧ 13-bit wide instructions
‧ 8-bit wide data path
‧ 5-level deep hardware stack
‧ 4K x 13 bits on chip EPROM/ROM
‧ 140 x 8 bits on chip general purpose registers (SRAM)
‧ Operating speed: DC-20 MHz clock input DC-100 ns instruction cycle
‧ Direct, indirect addressing modes for data accessing
‧ One 8-bit real time clock/counter (Timer0) with 8-bit programmable prescaler
‧ Three 8-bit real time clock/counter (Timer1, Timer2, and Timer3) with period setting
‧ Internal Power-on Reset (POR)
‧ Built-in Low Voltage Detector (LVD) for Brown-out Reset (BOR)
‧ Power-up Reset Timer (PWRT) and Oscillator Start-up Timer(OST)
‧ On chip Watchdog Timer (WDT) with internal oscillator for reliable operation and soft-ware watch-dog enable/disable control
‧ Five I/O ports (38 I/O pins) with independent direction control
‧ 32 programmable pull-high input pins
‧ 12 wake-up pins
‧ 2 open-drain pins
‧ 2 R-option pins
‧ Clock output with high driving ability
‧ 19 channels of 15-bit resolution Resistor to Frequency Converter (RFC) output
‧ 2 channels of maximum 10-bit resolution Pulse Width Modulation (PWM) output
‧ Built-in 8-bit data comparator
‧ Seven internal interrupt source: Timer0 overflow, Timer1 match, Timer2 match, Timer3 match, SPI module (Receive & Transmit), RFC module; One external interrupt source: INT pin change
‧ Wake-up from SLEEP by port input change
‧ Power saving SLEEP mode
‧ Programmable Code Protection
‧ Built-in RC oscillator with external resistor
‧ Selectable oscillator options:
- ERC: External Resistor/Capacitor Oscillator
- ERIC: External Resistor/Internal Capacitor Oscillator
- HF: High Frequency Crystal/Resonator Oscillator
- LF: Low Frequency Crystal Oscillator
‧ Wide-operating voltage range:
- EPROM : 2.3V to 5.5V
- ROM : 2.3V to 5.5VPinout
DescriptionThe FM8P51 series is a family of low-cost, high speed, high noise immunity, EPROM/ROM-based 8-bit CMOS microcontrollers. FM8P51 employs a RISC architecture with only 47 instructions. All instructions are single cycle except for program branches which take two cycles. The easy to use and easy to remember instruction set reduces development time significantly.
The FM8P51 series consists of Power-on Reset (POR), Brown-out Reset (BOR), Power-up Reset Timer (PWRT), Oscillator Start-up Timer(OST), Watchdog Timer, EPROM/ROM, SRAM, tri-state I/O port, I/O pull-high/open-drain control, Power saving SLEEP mode, 4 real time programmable clock/counter, Interrupt, SPI, RFC, data compare, Wake-up from SLEEP mode, and Code Protection for EPROM products. There are four oscillator configurations to choose from, including the power-saving LP (Low Power) oscillator and cost saving RC oscillator. The FM8P51 series address 4K×13 of program memory.
The FM8P51 series can directly or indirectly address its register files and data memory. All special function registers including the program counter are mapped in the data memory.
FM8P51 Data Sheet
