參數(shù)資料
型號： PCF2113AUF4
廠商： NXP Semiconductors N.V.
英文描述： LCD controllers/drivers
中文描述： LCD控制器/驅(qū)動器
文件頁數(shù)： 31/72頁
文件大?。?/td> 332K
代理商： PCF2113AUF4
2001 Dec 19
31
Philips Semiconductors
Product specification
LCD controllers/drivers
PCF2113x
9.8
Display configuration
Bit P
P = 0: default.
P = 1: mirrors the column data.
Bit Q
Q = 0: default.
Q = 1: mirrors the row data.
9.9
Temperature control
Default is TC1 = 0 and TC2 = 0. Selects the default
temperature coefficient for the internally generated V
LCD
(see Table 10).
The ranges for TC are given in Chapter 13.
Table 10
TC1 and TC2 selection of V
LCD
temperature
coefficient
9.10
Set V
LCD
TheV
LCD
valueisprogrammedbyinstruction.Twoon-chip
registers, V
A
and V
B
hold V
LCD
values for the character
mode and the icon mode respectively. The generated
V
LCD
value is independent of V
DD
, allowing battery
operation of the chip.
V
LCD
programming:
1.
Send ‘function set’ instruction with H = 1
2.
Send ‘set V
LCD
’ instruction to write to voltage register:
a) DB7, DB6 = 10: DB5 to DB0 are V
LCD
of character
mode (V
A
)
b) DB7, DB6 = 11: DB5 to DB0 are V
LCD
of icon
mode (V
B
)
c) DB5 to DB0 = 000000 switches V
LCD
generator off
(when selected)
d) During ‘display off’ and power-down the V
LCD
generator is also disabled.
3.
Send ‘function set’ instruction with H = 0 to resume
normal programming.
9.11
Reducing current consumption
Reducing current consumption can be achieved by one of
the options given in Table 11.
When V
LCD
lies outside the V
DD
range and must be
generated, it is usually more efficient to use the on-chip
generator than an external regulator.
Table 11
Reducing current consumption
TC1
TC2
DESCRIPTION
0
1
0
1
0
0
1
1
V
LCD
temperature coefficient 0
V
LCD
temperature coefficient 1
V
LCD
temperature coefficient 2
V
LCD
temperature coefficient 3
ORIGINAL MODE
ALTERNATIVE MODE
Character mode
Display on
V
LCD
generator operating
Any mode
Icon mode (control bit IM)
Display off (control bit D)
Direct mode
power-down (PD pin)
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