◆◆ PMS271 ◆◆
General purpose OTP series
Not supposed to use in AC RC step-down powered or high EFT requirement applications
Operating temperature : -20°C ~ 70°C
System Features
1. 1KW OTP program memory 
2. 64 Bytes data RAM 
3. One hardware 16-bit timer 
4. Support fast wake-up 
5. 16 IO pins with 10mA capability and optional pull-high resistor
6. Every IO pin can be configured to enable wake-up function 
7. Band-gap circuit to provide 1.20V reference voltage 
8. Internal High RC Oscillator(IHRC) frequency
9. Total 8-channel 8-bit ADC, including one channel for band-gap reference voltage input 
10. Built-in half VDD bias voltage generator for LCD application 
11. Operating voltage range: 2.2V ~ 5.5V 
12. Clock sources: External crystal oscillator,internal high RC oscillator and internal low RC oscillator 
13. Eight levels of LVD reset: 4.1V, 3.6V, 3.1V, 2.8V, 2.5V, 2.2V, 2.0V, 1.8V 
14. Two external interrupt pins
CPU Features
1. Operating modes: Two processing units FPPATM mode or Traditional one processing unit mode
2. 101 powerful instructions 
3. Most instructions are 1T execution cycle
4. Programmable stack pointer and adjustable stack level
5. Direct and indirect addressing modes for data access. Data memories are available for use as an index pointer of Indirect addressing mode
6. Separated IO space and memory space 
Content Date Version Download
PMS271 datasheet 2018-12-25 released v1.05 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
APN001 Output impedance of ADC analog signal source Download(CN): Download(EN):
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):
APN005 Effects of over voltage input to ADC 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):