◆◆ PMC251 ◆◆
High EFT series
Operating temperature : -40°C ~ 85°C
System Features
1. 1KW OTP program memory 
2. 60 Bytes data RAM 
3. One hardware 16-bit timer 
4. 12 IO pins with 10mA capability and optional pull-high resistor
5. Every IO pin can be configured to enable wake-up function 
6. Operating frequency range: DC ~ 8MHz@VDD≧3.3V; DC ~ 4MHz@VDD≧2.5V; DC ~ 2MHz@VDD≧2.2V 
7. Operating voltage range: 2.2V ~ 5.5V 
8. Clock sources: External crystal oscillator,internal high RC oscillator and internal low RC oscillator 
9. Support fast wake-up 
10. Eight levels of LVD reset: 4.1V, 3.6V, 3.1V, 2.8V, 2.5V, 2.2V, 2.0V, 1.8V 
11. Two external interrupt pins
12. Band-gap circuit to provide 1.20V reference voltage 
CPU Features
1. Operating modes: Two processing units FPPATM mode or Traditional one processing unit mode
2. 99 powerful instructions 
3. Programmable stack pointer and adjustable stack level 
4. All data memories are available for use as an index pointer 
5. Most instructions are 1T execution cycle
6. Separated IO space and memory space 
7. Direct and indirect addressing modes for data and instructions
Content Date Version Download
PMC251 datasheet 2014-05-21 released v0.12 Download(CN): Download(EN):
Package Information 2023-09-13 released v0.14 Download(CN): Download(EN):
Content Date Version Download
IDE software 2024-06-12 released v1.01A3 Download(EN):
Program Writer software 2024-06-12 released v1.01A3 Download(EN):
Content Description Download
APN002 Over voltage protection Download(CN): Download(EN):
APN003 Over voltage protection Download(CN): Download(EN):
APN004 Semi-Automatic writing handler Download(CN): Download(EN):
APN007 Setting up LVR level Download(CN): Download(EN):
APN011 Semi-Automatic writing Handler improve writing stability Download(CN): Download(EN):
APN013 Notification of crystal oscillator Download(CN): Download(EN):
APN019 E-PAD PCB layout guideline Download(CN): Download(EN):