參數(shù)資料
型號： PCF2113X
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)： 30/72頁
文件大?。?/td> 332K
代理商： PCF2113X
2001 Dec 19
30
Philips Semiconductors
Product specification
LCD controllers/drivers
PCF2113x
9.3
Bit IM
When IM = 0, the chip is in character mode. In the
character mode characters and icons are driven
(MUX 1 : 18). The V
LCD
generator, if used, produces the
V
LCD
voltage programmed in register V
A
.
When IM = 1, the chip is in icon mode. In the icon mode
only the icons are driven (MUX 1 : 2) and the V
LCD
generator, if used, produces the V
LCD
voltage as
programmed in register V
B
.
Table 7
Normal/icon mode operation
9.4
Bit IB
Icon blink control is independent of the cursor/character
blink function.
When IB = 0, the icon blink is disabled. Icon data is stored
in CGRAM character 0 to 2 (3
×
8
×
5 = 120 bits for
120 icons).
When IB = 1, the icon blink is enabled. In this case each
icon is controlled by two bits. Blink consists of two half
phases (corresponding to the cursor on and off phases
called even and odd phases hereafter).
Icon states for the even phase are stored in CGRAM
characters 0 to 2 (3
×
8
×
5 = 120 bits for 120 icons).
These bits also define icon state when icon blink is not
used (see Table 9).
Icon states for the odd phase are stored in CGRAM
character4 to 6(another120 bitsforthe120 icons).When
icon blink is disabled CGRAM characters 4 to 6 may be
used as normal CGRAM characters.
9.5
Direct mode
When DM = 0, the chip is not in the direct mode. Either the
internal V
LCD
generator or an external voltage may be
used to achieve V
LCD
.
When DM = 1, the chip is in direct mode. The internal V
LCD
generator is turned off and the V
LCD2
output is directly
connected to the V
LCD
generator supply voltage V
DD2
.
The direct mode can be used to reduce the current
consumption when the required V
LCD2
output voltage is
close to the V
DD2
supply voltage. This can be the case in
icon mode or in Mux 1:9 (depending on LCD liquid
properties).
9.6
Voltage multiplier control
Bits S1 and S0
A software configurable voltage multiplier is incorporated
in the V
LCD
generator and can be set via the ‘Set HVgen
stages’ command.
The voltage multiplier control can be used to reduce
current consumption by disconnecting internal voltage
multiplier stages, depending on the required V
LCD
output
voltage (see Table 8).
Table 8
S1 and S0 control of voltage multiplier
9.7
Screen configuration
Bit L
L = 0: the two halves of a split screen are connected in a
standard way i.e. column 1/61, 2/62 to 60/120; default.
L = 1: the two halves of a split screen are connected in a
mirrored way i.e. column 1/120, 2/119 to 60/61. This
allows single layer PCB or glass layout.
IM
MODE
V
LCD
0
1
character mode
icon mode
generates V
A
generates V
B
S1
S0
DESCRIPTION
0
0
set V
LCD
generator stages to 1
(2 x voltage multiplier)
set V
LCD
generator stages to 2
(3 x voltage multiplier)
set V
LCD
generator stages to 3
(4 x voltage multiplier)
do not use
0
1
1
0
1
1
Table 9
Blink effect for icons and cursor character blink
PARAMETER
EVEN PHASE
ODD PHASE
Cursor character blink
Icons
block (all on)
state 1; CGRAM character 0 to 2
normal (display character)
state 2; CGRAM character 4 to 6
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