Edid Contents; Circuit Description - Philips 105G7 Series Service Manual

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4.4 EDID CONTENTS

5. CIRCUIT DESCRIPTION

5.1 MICRO CONTROLLER CIRCUIT
MICRO Controller
The IC101 contains a 8031 8-bit CPU core, 512 bytes of RAM, 32K bytes of ROM, 10 channel 8 bit PWM
D/A converters, 4 channel A/D converters, 2 16 bit timer/counters, internal H-sync and V-sync signals
processor providing mode detection, watch- dog timer preventing system from abnormal operation, and an I
bus interface.
H/V sync signals processor
The functions of the sync processor include polarity detection, H-SYNC & V-SYNC signals counting, and
Programmable SYNC signals output, free running signal generator. Pin41/Pin42 are for the H-SYNC and V-
SYNC input, Pin34/Pin33 will output the same signal as input sync signal without delay, and the polarity is
setting in the positive. When no signal input, the Pin34 and Pin33 will output a free run signal for the monitor
testing use.
On Screen Display Controller
The IC801 is designed for pre-amp and displaying the built-in characters or fonts onto monitor screen. The
display operation is by transforming data and control information from micro controller to RAM through a serial
data interface.
Pin14/15/16 are used to output the B/G/R-bias.
Pin21/20/19 are used to output the B/G/R-gain.
Pin5/6/7 are used to input the R/G/B signal.
Pin11/12 are SDA/SCL.
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0 1 2 3
________________________________________
0 | 00 FF FF FF FF FF FF 00 5A
10 | 1B 85 01 01
20 | 1D 1C 15 B0
30 | 9B 24 10 48
40 | 31 59 01 01
50 | 01 01 01 01
60 | 1F 20 20 40
70 | 00 1E 00 00
80 | 30 34 30 31
90 | 00 00 00 FD
100 | 00 0A 20 20
110 | 00 FC 00 51
120 | 20 20 20 20
4 5 6 7 8
01 01 01 0E 01
2A E0 58 9F 54
4C FF F8 00 45
01 01 01 01 01
F9 15 20 F8 30
13 00 0E CA 10
00 FF 00 50 4C 36
30 30 30 30 31 0A
00 32 78 1E 36
20 20 20 20 00
35 31 2D 39 0A 20
20 20 00 A4
11
9
63
03
46
59
01
58
00
08
00
2
C