General Description
The MK7A25FP is an 8 bit RISC high performance microcontroller with 10bit A/D converter. It is equipped with 2K word MTP (Multi-time Programmable) ROM, 128 Bytes RAM, Timer/Counter, Capture, Interrupt, LVR(Low Voltage Reset), I/O ports and PWM output in a single chip.
1. Feature
l ROM size: 2K x 16 bits
l RAM: 37 x 8 bits(Special Purpose Register)
l + 128 x 8 (General Purpose Register)
l STACK: 8 Levels
l One instruction build by two systems clock.
l R eset mode:
(a) Power-On reset
(b) Low voltage reset
(c) RESETB/PC1 (if be set as reset pin) input a negative pulse.
(d) Watchdog timer count overflow reset
l Dual Clock Mode
- External RC or Crystal oscillator
- Internal 4MHz RC oscillator
l Timer/counter: 3 units.
- TM1: 16-bit, capture & Timer.
- TM2: 8-bit, PWM (period) & Timer.
- TM3: 8-bit, PWM (duty) & Timer.
- TO : TM2(PWM) clock out
l Watchdog Timer: On chip WDT is based on an internal RC oscillator (for WDT used only). Have 8 period can be selected. User can extend the WDT overflow period by
using prescaler.
l Interrupt events:
(a) External interrupt (PA7~PA0).
(b) Internal timer/event counter interrupt (TM1~TM3).
(c) ADC end of conversion interrupt
l I/O port: 18 pins
l PWM: one channel
l ADC: max 10(6+4)-bit and 4 channels, at least 10-bit resolution. It can use at converter mode or compare mode
l Wake-up mode:
1. Port A (PA7~PA0) pin change wakeup
2. i_WDT wakeup
l Different Package Type: MK7A25FPD20C: 20 pin DIP MK7A25FPS20C: 20 pin SOP MK7A25FPD18C: 18 pin DIP MK7A25FPS18C: 18 pin SOP MK7A25FPD14C: 14 pin DIP MK7A25FPS14C: 14 pin SOP
应用范围：充电器、电磁炉、电动车报警器、电动牙刷、应急灯、感应灯、开瓶器等方面。
