參數(shù)資料
型號： HT46R62
廠商： Holtek Semiconductor Inc.
英文描述： A/D with LCD Type 8-Bit MCU
中文描述： 在A / D液晶型8位微控制器
文件頁數(shù)： 23/46頁
文件大?。?/td> 401K
代理商： HT46R62
HT46R62/HT46C62
Rev. 1.60
23
July 14, 2005
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A/D Conversion Timing
mov
mov
mov
adrh_buffer,a
a,ADRL
adrl_buffer,a
:
:
start_conversion
; save result to user defined memory
; read conversion result low byte value from the ADRL register
; save result to user defined memory
jmp
; start next A/D conversion
LCD Display Memory
The device provides an area of embedded data memory
for LCD display. This area is located from 40H to 53H of
the RAM at Bank 1. Bank pointer (BP; located at 04H of
the RAM) is the switch between the RAM and the LCD
display memory. When the BP is set as 1 , any data
written into 40H~53H will effect the LCD display. When
the BP is cleared to 0 , any data written into 40H~53H
means to access the general purpose data memory.
The LCD display memory can be read and written to
only by indirect addressing mode using MP1. When
data is written into the display data area, it is automati-
cally read by the LCD driver which then generates the
corresponding LCD driving signals. To turn the display
on or off, a 1 or a 0 is written to the corresponding bit
of the display memory, respectively. The figure illus-
trates the mapping between the display memory and
LCD pattern for the device.
LCD Driver Output
TheoutputnumberofthedeviceLCDdrivercanbe20 2
or 20 3 or 19 4 by option (i.e., 1/2 duty, 1/3 duty or 1/4
duty). The bias type LCD driver can be R type or C
type. If the R bias type is selected, no external capaci-
tor is required. If the C bias type is selected, a capaci-
tor mounted between C1 and C2 pins is needed. The
LCD driver bias voltage can be 1/2 bias or 1/3 bias by
option. If 1/2 bias is selected, a capacitor mounted be-
tween V2 pin and ground is required. If 1/3 bias is se-
lected, two capacitors are needed for V1 and V2 pins.
Refer to application diagram.
Condition
Option
Low Bias Current
(Typ.)
High Bias Current
(Typ.)
1/3 Bias
(V
LCD
/4.5) 15 A
(V
LCD
/4.5) 45 A
1/2 Bias
(V
LCD
/3) 15 A
(V
LCD
/3) 45 A
R Type Bias Current
Note:
The 52-pin QFP package does not support the
charge pump (C type bias) of the LCD. The LCD
bias type must select the R type by option.
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Display Memory
相關(guān)PDF資料
PDF描述
HT46C63 A/D with LCD Type 8-Bit MCU
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