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参数资料
型号： ADE7569ASTZF16
厂商： Analog Devices Inc
文件页数： 93/136页
文件大小： 0K
描述： IC ENERGY METER MCU 16K 64LQFP
标准包装： 1
输入阻抗： *
测量误差： *
电压 - 高输入/输出： *
电压 - 低输入/输出： *
电流 - 电源： *
电源电压： *
测量仪表类型： *
工作温度： *
安装类型： 表面贴装
封装/外壳： 64-LQFP
供应商设备封装： 64-LQFP（10x10）
包装： 托盘
Preliminary Technical Data
A 96 segment LCD with 4× multiplexing requires 96/4 = 24
segment lines. Sixteen pins, FP0 to FP15, are automatically
dedicated for use as LCD segments. Eight more pins must be
chosen for the LCD function. Because the LCD has 4× multi-
plexing, all four common lines are used. As a result, COM2/FP28
and COM3/FP27 cannot be utilized as segment lines. Based on
the alternate functions of the pins used for FP16 through FP25,
FP16 to F23 are chosen for the seven remaining segment lines.
The LCD is setup with the following 8052 code:
; setup LCD pins to have LCD functionality
ADE7566/ADE7569
These pins are enabled for LCD functionality in the LCD
Segment Enable SFR (LCDSEGE, 0x97) and LCD Segment
Enable 2 SFR (LCDSEGE2, 0xED).
To determine contrast setting for this 5 V LCD, Table 76 shows
the BIASLVL[5:0] setting that corresponds to a VC of 5 V in
1/3 bias mode. The nominal bias level setting for this LCD is
BIASLVL[5:0] = [111111].
MOV
MOV
LCDSEG, # FP20EN+FP21EN+FP22EN+FP23EN
LCDSEGX, #FP16EN+FP17EN+FP18EN+FP19EN
; setup LCDCON for f LCDCLK =2048Hz, 1/3 bias and 4x multiplexing
MOV
LCDCON, #BIAS+LMUX1+LMUX0
; setup LCDCONX for charge pump and BIASLVL[1110111]
MOV
LCDCONX, #BIASLVL5+BIASLVL4+BIASLVL3+ BIASLVL2+BIASLVL1+BIASLVL0
; set up refresh rate for 64Hz with f LCDCLK =2048Hz
MOV
LCDCLK, #FD3+FD2+FD1+FD0
; set up LCD data registers with data to be displayed using
; LCDPTR and LCDDATA registers
; turn all segments on FP25 ON and FP26 OFF
ORL
MOV
MOV
ANL
ORL
LCDCONY,#01h ; start data memory refresh
LCDDAT, #F0H
LCDPTR, #80h OR 0DH
LCDCONY,#0FEh ; end of data memory refresh
LCDCON,#LCDEN ; enable LCD
To setup the same 3.3 V LCD for use with an external resistor ladder:
; setup LCD pins to have LCD functionality
MOV
MOV
LCDSEG, #FP20EN+FP21EN+FP22EN+FP23EN
LCDSEGX, #FP16EN+FP17EN+FP18EN+FP19EN
; setup LCDCON for f LCDCLK =2048Hz, 1/3 bias and 4x multiplexing
MOV
LCDCON, #BIAS+LMUX1+LMUX0
; setup LCDCONX for external resistor ladder
MOV
LCDCONX, #EXTRES
; set up refresh rate for 64Hz with f LCDCLK =2048Hz
MOV
LCDCLK, #FD3+FD2+FD1+FD0
; set up LCD data registers with data to be displayed using
; LCDPTR and LCDDATA registers
; turn all segments on FP25 ON and FP26 OFF
ORL
MOV
MOV
ANL
ORL
LCDCONY,#01h ; start data memory refresh
LCDDAT, #F0H
LCDPTR, #80h OR 0DH
LCDCONY,#0FEh ; end of data memory refresh
LCDCON,#LCDEN ; enable LCD
Rev. PrA | Page 93 of 136
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