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6
×
6
5
×
L
4
E
6
L
×
D
6
E
D
L
E
D
36
30
24
Figure 7-12 LED grouping per board
The communication between PNX85500, Complex
Programmable Logic Device (CPLD) and the Ambilight module
uses the SPI protocol; refer to figure
protocol outside LED
board. Between the CPLD and the LED
driver, as "extra" line is mentioned:
•
Non-SPI signals that are required for the LED driver
•
Temperature sensor line.
S P I
P N X
Figure 7-13 Communication protocol outside LED board
Refer to figure for an overview of the communication inside the
LED board.
S P I
S P I
B uffer
Tem p
sensor
Te m p
Figure 7-14 Communication protocol inside LED board
The buffer is built around item no. 7B20 (diagram AL1A) and
regenerates the clock signals. Refer to figure
buffer.
3
×
2
5
L
×
6
E
3
4
D
L
×
+
E
6
5
D
L
L
E
E
D
D
18
15
12
9
18770_210_100126.eps
100126
7-13 Communication
S P I + e x tra
C P LD
18770_211_100126.eps
100126
E x tra
S P I
LE D
D river
E E P R O M
S P I
S P I
18770_213_100126.eps
100219
7-15 Ambilight
Circuit Descriptions
3B01-2
2
PWM-CLOCK
100R
3B01-1
1
SPI-CLOCK
100R
Figure 7-15 Ambilight buffer
The temperature sensor is built around item no. 7B30 (diagram
AL1A) and indicates overtemperature of the board. Refer to
figure
7-16 Temperature
+3V3
FB40
Figure 7-16 Temperature sensor
The EEPROM (item no. 7B07; diagram AL1A) contains
alignment information about the mounted LEDs and is
programmed during the alignment process in production. Refer
to figure
7-17
EEPROM.
SPI-DATA-IN-BUF
SPI-CLOCK-BUF
+3V3
7B06
74LVC1G32GW
1
SPI-CS
2
DATA-SWITCH
SPI-DATA-RETURN
The LED driver is built around item no. 7B26 (diagram AL1A)
and controls the LEDs. Refer to figure
back to
div. table
Q552.1L LA
7.
+3V3
7B20-1
74LVC2G17
3B30-1
7
1
6
1
8
220R
7B20-2
74LVC2G17
+3V3
3B30-4
8
3
4
4
5
220R
18770_214_100126.eps
sensor.
3B34
+3V3
100K
RES
+3V3
7B30
1
4
3
LMV331IDCK
FB41
18770_215_100126.eps
+3V3
7B07
M95010-WDW6
VCC
Φ
5
2
D
Q
(64K)
6
C
4
1
S
7
HOLD
+3V3
3B02-1
1
8
3
W
10K
GND
18770_216_100126.eps
Figure 7-17 EEPROM
7-18 LED
EN 55
PWM-CLOCK-BUF
SPI-CLOCK-BUF
100126
TEMP-SENSOR
100126
3B02-2
+3V3
7
2
10K
100126
driver.
2010-Dec-29
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