參數(shù)資料
型號(hào)： UPD16682P
廠商： NEC Corp.
英文描述： 1/65 DUTY LCD CONTROLLER/DRIVER WITH ON-CHIP RAM
中文描述： 1 / 65稅LCD控制器/驅(qū)動(dòng)器，片內(nèi)RAM
文件頁(yè)數(shù)： 16/56頁(yè)
文件大小： 435K
代理商： UPD16682P
Data Sheet S13368EJ3V0DS00
16
μ
PD16682
6. DISPLAY DATA RAM
6.1 Display Data RAM
This is the RAM that is used to store the display’s dot data. The RAM configuration is 65 (8 pages x 8 bits + 1) x
132 bits. Any specified bit can be accessed by selecting the corresponding page address and column address.
As is shown in Figure 6
1 below, the display data (D
7
to D
0
) from the MPU corresponds to the common direction in
the LCD, so that if a multiple set of
μ
PD16682 chips is used, there are fewer constraints on transfers of display data
and relatively more freedom for display configurations.
The MPU accesses the display data RAM for read/write operations via the I/O buffer, and these operations are
independent of the LCD driver signal read operations. Therefore, there are absolutely no adverse effects (such as
flicker) in the display when display data RAM is accessed asynchronously in relation to the LCD contents.
Figure 6
1. LCD Data and LCD Display
LCD data
LCD display
D
0
0
1
1
1
0
COM
0
D
1
1
0
0
0
0
COM
1
D
2
0
0
0
0
0
COM
2
D
3
0
1
1
1
0
COM
3
D
4
1
0
0
0
0
COM
4
...
...
6.2 Page Address Circuit
The page address set command specifies the page address in the display data RAM, as is shown in Figure 6
2. To
access a different page, simply specify a different page address using this command.
Page address 8 (D
3
,D
2
,D
1
,D
0
= 1,0,0,0) is a RAM area that is used exclusively for indicator, so only display data D
0
is valid.
6.3 Column Address Circuit
The column address set command specifies the column address in the display data RAM, as is shown in Figure
6
2. The specified column address is incremented each time a display data read or write command is input, so the
MPU is able to successively access display data.
Incrementation of the column address stops at 83H. The column address and page address are mutually
independent, which means that to switch from column 83H on page 0 to column 00H on page 1, both the page
address and column address must be separately specified again.
Also, as is shown in Table 6
1, the ADC command (segment driver direction select command) can be used to invert
the correspondence between the display data RAM’s column address and segment output. This reduces the number
of IC layout constraints that are imposed when setting up the LCD module.
Table 6
1. Relation between Display Data RAM Column Address and Segment Output
SEG Output
SEG
0
SEG
131
ADC
“0”
00H
→
Column Address
→
83H
(D
0
)
“1”
83H
←
Column Address
←
00H
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參數(shù)描述
UPD16682P-001 制造商:未知廠家 制造商全稱(chēng):未知廠家 功能描述:LCD Display Driver
UPD16682P-002 制造商:未知廠家 制造商全稱(chēng):未知廠家 功能描述:LCD Display Driver
UPD16682P-003 制造商:未知廠家 制造商全稱(chēng):未知廠家 功能描述:LCD Display Driver
UPD16682P-004 制造商:未知廠家 制造商全稱(chēng):未知廠家 功能描述:LCD Display Driver
UPD16682W 制造商:NEC 制造商全稱(chēng):NEC 功能描述:1/65 DUTY LCD CONTROLLER/DRIVER WITH ON-CHIP RAM
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