FEELING
FM8PE531M
OTP-Based 8-Bit Microcontroller
Devices Included in this Data Sheet:
FM8PE531MA: 14-pin OTP device
FM8PE531MB: 16-pin OTP device
GENERAL DESCRIPTION
The FM8PE531M is a low-cost, high speed, OTP-based 8-bit CMOS microcontrollers. It employs a RISC
architecture with only 37 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 FM8PE531M consists of Power-on Reset (POR), Brown-out Reset (BOR), Power-up Reset Timer (PWRT),
Watchdog Timer, OTP, SRAM, tristate I/O port, I/O pull-high control, Power saving SLEEP mode, real time
programmable clock/counter, Interrupt, PWM, Comparator (with CVREF, Fixed Band Gap reference voltage), Wake-
up from SLEEP mode products.
FEATURES
2K Word on chip OTP-ROM and 88 Bytes on chip general purpose registers (SRAM).
6-level deep hardware stack.
One analog comparator.
- Internal reference voltage: 16-step CVREF module, 1.2V fixed voltage reference.
One 16-bit real timer/Counter with 2-bit programmable pre-scaler.
Two 8-bit fixed period-cycle PWM.
Three channel 15-bit RFC.
Six levels LVDT (Low Voltage Detect): 3.6V, 2.6V, 2.4V, 2.2V, 2.0V and 1.8V.
Power-up Reset Timer (PWRT)
On chip Watchdog Timer (WDT) with internal oscillator for reliable operation.
Two I/O port, PORTA and PORTB with independent direction control:
- 13 Bi-direction I/O pin (Programmable Pull-up enable in Input mode).
- One Input /Open-drain pin (IOB3/RSTB).
Two kinds of interrupt source:
- 4 internal interrupt sources: Timer1, RFC, Comparator and LVDT.
- 1 external interrupt sources: INT pin.
Wake-up from SLEEP:
- ALL pin (IOA5~IOA0, IOB7~IOB0) input change wake-up.
- WDT overflow.
Power saving SLEEP mode.
Selectable oscillator options:
-HIRC: Internal Resistor/Capacitor 8MHZ Oscillator.
-LIRC: Internal Resistor/Capacitor 55KHZ Oscillator.
Wide-operating voltage range: 2.0V 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.
Web site: http://www.feeling-tech.com.tw
Rev1.00.003 Feb 32, 2017
Page 1 of 55, FM8PE531M