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CHAPTER 18 LCD CONTROLLER/DRIVER
User’s Manual U15798EJ2V0UD
Figure 18-1. LCD Controller/Driver Block Diagram
Internal bus
CAPH
CAPL
V
LC0
V
LC1
V
LC2
Booster circuit
Buff
er
COM0
COM1
COM2
COM3
SCOM0
Common driver
(for time division)
Common driver
(for static display)
S0
S1
S2
S3
Segment driver 0
P80/S12
P81/S13
P82/S14
P83/S15
Segment driver 3
. . .
. . .
P84/S16
P85/S17
P86/S18
P87/S19
Segment driver 4
. . . . . .
. . . . . .
P110/S36
P111/S37
P112/S38
P113/S39
Segment driver 9
Static/dynamic
display alternately
Port/segment
alternately
Port/segment
alternately
. . . . . .
. . . . .
V
LCD0
,
V
LCD1
,
V
LCD2
Pin function switching
register 8 (PF8)
Pin function switching
register 11 (PF11)
LCD frame
frequency selector
Timing control signal
SEGREG0 to 3
SEGREG12 to 15
SEGREG16 to 19
. . . . . .
. . . . . . SEGREG36 to 39
SEGREG39
. . . . . .
SEGREG2
SEGREG1
SEGREG0
4 bits
4 bits
Segment driver
SDSEL
30
4 bits
4 bits
4 bits
4 bits
SDSEL
31
SDSEL
32
Segment
driver 0
(S0 to S3)
Segment
driver 1
(S4 to S7)
Segment
driver 2
(S8 to S11)
LCD source
clock selector
Timing
control
LCDC
30
LCDC
31
LCDC
32
LCDC
33
f
XT
f
X
/2
6
f
X
/2
7
f
X
/2
8
f
LCD
LCDON SCOC
BLSEL
VLCON
BLON LCDM0
Blinking control
cycle selector
Blinking
source
clock
Booster clock
generator
f
LCD
Booster clock
Booster
circuit
control
signal
Buffer
Segment
driver
LCD display mode
register 3 (LCDM3)
LCD clock control
register 3 (LCDC3)
Static/dynamic
display switching
register 3 (SDSEL3)
Blinking clock
4 bits
4 bits
:
SEGREG3
4 bits
4 bits
LCD gain adjust
register 0 (VLCG0)
GAIN
Buff
er
Buff
er
Buff
er
Buff
er
Buff
er
Buff
er
Buff
er
Buff
er
Buff
er
Buff
er
Buff
er
Buff
er
Buff
er
Buff
er
Buff
er
Buff
er
Buff
er
Buff
er
Buff
er
Buff
er
Содержание mPD780344 Series
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