參數(shù)資料
型號(hào)： SED122ADXA
元件分類(lèi)： 顯示控制器
英文描述： 16 X 60 DOTS DOT MAT LCD DRVR AND DSPL CTLR, UUC165
封裝： DIE-165
文件頁(yè)數(shù)： 7/50頁(yè)
文件大?。?/td> 398K
代理商： SED122ADXA
EPSON
4–15
SED1220
Fig. 1
Identification of data bus signals
The SED1220 series identifies data bus signals, as shown in Table 3, by combinations of A0 and WR (E).
Table 3
Chip select
The SED1220 series has a chip select pin (CS). Only when CS = “Low”, MPU interfacing is enabled.
In any status other than Chip Select, D0 to D7 and A0, WR, SI and SCL inputs are invalidated. When a serial input interface
is selected, the shift register and counter are reset.
However, the Reset signal is input regardless of the CS status.
Power Circuit
This is a low-power-consumption power circuit that generates a voltage required for liquid crystal drive.
The power circuit consists of a boosting circuit, voltage regulating circuit and voltage follower.
The power circuit incorporated in the SED1220 Series is set for a small-scale liquid crystal panel, so that its display quality
may be greatly deteriorated if it is used for a liquid crystal panel with a large display capacity.
In this case, an external power supply must be used.
A power circuit function can be selected by power control command. With this, an external power supply and a part of
the internal power supply can be used together.
Amplifying
Voltage regulat-
Voltage
External
Amplifying
circuit
ing circuit
follower
voltage input
system pin
q
—
Per specification
×
q
VOUT
OPEN
××
q
V5 = VOUT
OPEN
×××
V1, V2, V3, V4, V5
OPEN
Note 1
Note 2
Note 3
Note 1: When the boosting circuit is turned off, make boosting system pins (CAP1+, CAP1-, CAP2+, CAP2-) open
and give a liquid crystal drive voltage to the VOUT pin from the outside.
Note 2: When the voltage regulating circuit is not used with the boosting circuit OFF, make the boosting system pins
open, connect between the V5 pin and VOUT pin, and give a liquid crystal drive voltage from the outside.
Note 3: When all the internal power supplies are turned off, supply liquid crystal drive voltages V1, V2, V3, V4 and
V5 from the outside, and make the CAP1+, CAP1-, CAP2+, CAP2- and VOUT pins open.
SCL
1
A0
SI
CS
D7
D6
D5
D4
D3
D2
D1
D0
D7
23
456
789
Common
68 series
80 series
Function
A0
E
WR
1
0
Writing to RAM and symbol register
0
1
0
Writing to internal register (command)
相關(guān)PDF資料
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SED1278D0B 制造商:未知廠家 制造商全稱(chēng):未知廠家 功能描述:CMOS DOT MATRIX LCD CONTROLLER DRIVER
SED1278D0C 制造商:未知廠家 制造商全稱(chēng):未知廠家 功能描述:CMOS DOT MATRIX LCD CONTROLLER DRIVER
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