BL22P14

BL22P14 LCD Type 8-Bit OTP MCU USER MANU V 1 . 0 ( 2010-4-15) Shanghai Belling Co., Ltd. Shanghai Belling Co., Ltd. BL22P14BMU2S2EPR14MANUAL LCD Type 8-bit OTP MCU BL22P14 1. General Description BL22P14 is an 8-bit high performance single chip microcontroller. It provides two group configurable I/O ports, two timers and multiple LCD for household appliances. 2. Features 8-bit CISC core（compatible with Motorola HC05） Low power（1uA@5V in stop mode） Operating Voltage: 2.5-5.5V(<=4MHz）, 3.5-5.5V(<=8MHz) Operating temperature: -40℃~85℃ 4K*8bit ROM 128byte RAM LCD diver with 18*4, 19*3, 19*2 and 19*1 14 bidirectional I/O PA as keyboard interrupt source Two external interrupt An 8-bit Timer A 16-bit Timer Watch dog Buzzer output LVD（typical 3.3V） LVR（typical 3.0V） 3．Pin Assignments TEL：86-21-64850700 WEB: www.belling.com.cn Page 1 of 33 Shanghai Belling Co., Ltd. BL22P14BMU2S2EPR14MANUAL TEL：86-21-64850700 WEB: www.belling.com.cn Page 2 of 33 Shanghai Belling Co., Ltd. BL22P14BMU2S2EPR14MANUAL 4. Pin Descriptions SSOP48/LQFP48/SOP28/SOP24 Pin name In/Out Share Description Pin Description PA0 I/O BZ0-buzzer output（+） PA1 I/O BZ1-buzzer output（-） Bit-programmable I/O port PA2 I/O for Schmitt trigger input or PA3 I/O PFD output PA4 I/O PA5 I/O PA6 I/O push-pull, each bit can be configured as a input with pull-high resistor or keyboard interrupt input PA7 I/O PB0 I/O INT0 Bit-programmable I/O port PB1 I/O INT1 for Schmitt trigger input or PB2 I/O TMR0-TIM...