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Feeling Technology
Feeling Technology


FM8PE55

EPROM/ROM-Based 8-Bit Microcontroller



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FM8PE55 pdf
FEELING
TECHNOLOGY
FM8PE55/E57
EPROM/ROM-Based 8-Bit Microcontroller Series
Devices Included in this Data Sheet:
FM8PE55E/E57E : EPROM devices
FM8PE55/E57 : Mask ROM devices
FEATURES
Only 47 single word instructions
All instructions are single cycle except for program branches which are two-cycle
13-bit wide instructions
All ROM/EPROM area GOTO/FGOTO instruction
All ROM/EPROM area subroutine CALL/FCALL instruction
8-bit wide data path
5-level deep hardware stack
Operating speed: DC-20 MHz clock input
DC-100 ns instruction cycle
Device
Pins # I/O # EPROM/ROM (Word) RAM (Byte)
FM8PE55/E55E 28
20
512
48
FM8PE57/E57E 28
20
2K
96
Direct, indirect addressing modes for data accessing
8-bit real time clock/counter (Timer0) with 8-bit programmable prescaler
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
Three I/O ports IOA, IOB and IOC with independent direction control
16 soft-ware control pull-high pins: Port B/Port C
8 soft-ware control pull-down pins:IOA0~A3/IOB0~B3
2 soft-ware control open-drain pins: IOC6/IOC7
One internal interrupt source: Timer0 overflow; One external interrupt source: INT pin
Wake-up from SLEEP by Port B/IOC4/IOC5 input falling
Power saving SLEEP mode
Programmable Code Protection
Selectable oscillator options:
- ERC: External Resistor/Capacitor Oscillator
- XT: Crystal/Resonator Oscillator
- HF: High Frequency Crystal/Resonator Oscillator
- LF: Low Frequency Crystal Oscillator
- IRC: Internal Resistor/Capacitor Oscillator
Wide-operating voltage range:
- EPROM : 2.3V to 5.5V
- ROM : 2.3V to 5.5V
This datasheet contains new product information. Feeling Technology reserves the rights to modify the product specification without notice.
No liability is assumed as a result of the use of this product. No rights under any patent accompany the sales of the product.
Rev1.5 May 21, 2010
P.1/FM8PE55/E57



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FM8PE55 pdf
FEELING
TECHNOLOGY
FM8PE55/E57
GENERAL DESCRIPTION
The FM8PE55/E57 series is a family of low-cost, high speed, high noise immunity, EPROM/ROM-based 8-bit
CMOS microcontrollers. It 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 FM8PE55/E57 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/pull-down control, Power saving SLEEP mode, real time programmable clock/counter,
Interrupt, 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 FM8PE55/E55E address 512×13 of program memory, and the FM8PE57/E57E address 2K×13 of program
memory.
The FM8PE55/E57 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.
BLOCK DIAGRAM
Oscillator
Circuit
Watchdog
Timer
ALU
Interrupt
Control
5-level
STACK
Program
Counter
EPROM
/ ROM
Timer0
FSR
SRAM
Instruction
Decoder
Accumulator
PORTA
PORTB
PORTC
Rev1.5 May 21, 2010
P.2/FM8PE55/E57



Part Number FM8PE55
Description EPROM/ROM-Based 8-Bit Microcontroller
Maker Feeling Technology - Feeling Technology
Total Page 30 Pages
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