ViewSonic E70FSB-2 Service Manual - Page 96

Ic Block Diagram - 24 led

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IC BLOCK DIAGRAM IC101 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 LED G VSYNC LED R HSYNC NC BRI RESET ROT VDD OFF V3.3 KEY B GND KEY A OSCO NC OSCI HSYNCO NC VSYNCO NC CS0 ISDA CS1 ISCL CS2 DEG ABL KEY NC WP NC V/D DSCL NC DSDA NC P/S NC HL HE MUTE B+ 42 41 40 39 38 37 36 35 34 33 32 31 30 29 28 27 26 25 24 23 22 IC102 M24C08-WBN6 WRITE Cycle in Progress START Condition DEVICE SELECT with RW = 0 First byte of instruction with RW = 0 already decoded by the device NO ACK Returned YES Next NO Operation is Addressing the Memory ReSTART YES Send Address and Receive ACK STOP NO START YES Condition DATA for the WRITE Operation Continue the WRITE Operation DEVICE SELECT with RW = 1 Continue the Random READ Operation ViewSonic Corporation 93 Confidential - Do Not Copy E70f-5_E70fB-5_E70fSB-5

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IC BLOCK DIAGRAM
CS0
32
NC
18
DSDA
25
NC
10
KEY B
37
RESET
4
ISDA
12
NC
28
CS1
31
DSCL
26
LED R
2
ABL
29
DEG
14
BRI
40
OFF
38
CS2
30
MUTE B+
22
HSYNC
41
VDD
5
WP
16
HSYNCO
34
GND
7
NC
11
V/D
17
LED G
1
OSCI
9
HL
23
NC
27
V3.3
6
IC101
OSCO
8
P/S
24
VSYNCO
33
ROT
39
KEY A
36
NC
3
KEY
15
ISCL
13
VSYNC
42
NC
19
NC
20
HE
21
NC
35
IC102 M24C08-WBN6
WRITE Cycle
in Progress
Next
Operation is
Addressing the
Memory
START Condition
DEVICE SELECT
with RW = 0
ACK
Returned
YES
NO
YES
NO
ReSTART
STOP
DATA for the
WRITE Operation
DEVICE SELECT
with RW = 1
Send Address
and Receive ACK
First byte of instruction
with RW = 0 already
decoded by the device
YES
NO
START
Condition
Continue the
WRITE Operation
Continue the
Random READ Operation
ViewSonic Corporation
Confidential – Do Not Copy
E70f-5_E70fB-5_E70fSB-5
93