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PDF BL22P14 Data sheet ( Hoja de datos )

Número de pieza BL22P14
Descripción LCD Type 8-Bit OTP MCU
Fabricantes BELLING 
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No Preview Available ! BL22P14 Hoja de datos, Descripción, Manual

BL22P14
LCD Type 8-Bit OTP MCU
USER MANU
V 1 . 0 ( 2010-4-15)
上海贝岭股份有限公司
Shanghai Belling Co., Ltd.

1 page




BL22P14 pdf
上海贝岭股份有限公司
Shanghai Belling Co., Ltd.
VDD
OSC2
OSC1
O
I
RSTB
I VPP
5. Function Descriptions
5.1 Block Diagram
BL22P14BMU2S2EPR14MANUAL
Power supply
Crystal oscillator or RC
clock
System reset input
5.2 Address Spaces
$0000-$006F: Control registers
$0070-$007F: LCD data
$0080-$00FF: RAM
$0100-$0FFF: Reserved
$1000-$1FFF: OTP ROM
5.3 Control Registers
Register name
PA
Address R/W
$00 R/W
Reset Value
0000 0000
TEL86-21-64850700 WEB: www.belling.com.cn
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5 Page





BL22P14 arduino
上海贝岭股份有限公司
Shanghai Belling Co., Ltd.
LCD frequency
Fs/25 =512 Hz
Fs/26 =256 Hz
Fs/27 =128 Hz
Fs/28 =64 Hz
Static
512
256
128
64
1/2Duty
256
128
64
32
BL22P14BMU2S2EPR14MANUAL
1/3Duty
171
85
1/4Duty
128
64
43 32
21 16
If RTC oscillator is the clock source, dividing frequency should be1/26~1/29.
THE FRAME FREQUENCY WHEN RTC IS CLCOK SOURCE(Hz)
LCD frequency
Fs/26 =512 Hz
Fs/27=256 Hz
Fs/28 =128 Hz
Fs/29 =64 Hz
Static
512
256
128
64
1/2Duty
256
128
64
32
1/3Duty
171
85
43
21
1/4Duty
128
64
32
16
Other dividing frequency (1/210~1/215) is used when OSC or RC is clock source.
LCD drive voltage
VLCD is the voltage source of LCD and divided to four voltage level by internal resistors.
VLCD may connect to VDD or other voltage. Two capacitors connecting to V1 and V2 will
improve stability for display.
COM/SEG output
The output number can be 4 COM and 18 SEG (48pin), 4 COM and 8 SEG (28pin and
24pin).COM3 and SEG18 are at common pin. COM3 is effective only at 1/4duty mode and
other mode is SEG18.
pin
duty
Drive number
bias
TEL86-21-64850700 WEB: www.belling.com.cn
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