參數(shù)資料
型號(hào): ADE7169ASTZF16
廠商: ANALOG DEVICES INC
元件分類: 模擬信號(hào)調(diào)理
英文描述: Single-Phase Energy Measurement IC with 8052 MCU, RTC and LCD driver
中文描述: SPECIALTY ANALOG CIRCUIT, QCC64
封裝: 9 X 9 MM, ROHS COMPLIANT, MO-22-VMMD-4, LFCSP-64
文件頁數(shù): 95/140頁
文件大?。?/td> 1359K
代理商: ADE7169ASTZF16
Preliminary Technical Data
ADE7169F16
(LCDCON, 0x95) control LCD functionality in the PSM2
operating mode.
Rev. PrD | Page 95 of 140
LCDPSM2
LCDEN
Comments
0
0
The display is OFF in PSM2.
0
1
The display is ON in PSM2.
1
X
The display is OFF in PSM2.
Note that the LCD configuration and data memory is retained
when the display is turned off.
EXAMPLE LCD SETUP
An example to set up the LCD peripheral for a specific LCD is
described below.
Type of LCD: 5V, 4x multiplexed with 1/3 bias, 96 segments
Voltage Generation: Internal Charge Pump
Refresh Rate: 64Hz
A 96 segment LCD with 4x multiplexing requires 96/4=24
segment lines. There are 16 pins that automatically dedicated
for use as LCD segments, FP0 to FP15. Eight more pins must be
chosen for the LCD function. Since the LCD has 4x
multiplexing, all four common lines are used so COM2/FP28
and COM3/FP27 cannot be utilized as segment lines. Based on
the alternate functions of the pins used for FP16 through FP25,
FP16-23 are chosen for the seven remaining segment lines.
These pins will be 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 5V LCD, look in Table 73
to find the BIASLVL[5:0] setting that corresponds to a VC of 5V
in 1/3 Bias Mode. The nominal bias level setting for this LCD is
BIASLVL[5:0]=[111111].
The LCD is setup with the following 8052 code:
;
setup LCD pins to have LCD functionality
MOV
LCDSEG, # FP20EN+FP21EN+FP22EN+FP23EN
MOV
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, from
Table 76
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
LCDCONY,#01h
MOV
LCDDAT, #F0H
MOV LCDPTR, #80h OR 0DH
ANL
LCDCONY,#0FEh
ORL
LCDCON,#LCDEN ; enable LCD
; start data memory refresh
; end of data memory refresh
To setup the same 3.3V LCD for use with an external resistor
ladder:
;
setup LCD pins to have LCD functionality
MOV
LCDSEG, #FP20EN+FP21EN+FP22EN+FP23EN
MOV
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, from
Table 76
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
LCDCONY,#01h
; start data memory refresh
MOV
LCDDAT, #F0H
MOV LCDPTR, #80h OR 0DH
ANL
LCDCONY,#0FEh
; end of data memory refresh
ORL
LCDCON,#LCDEN ; enable LCD
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