Texas Instruments 1 VOLTAGE SWITCH

B-20 MPB Schematic Diagrams
Figure B-4 MPB VGA Board Logic Diagrams (Sheet 5 of 5)
5VIN 7
3.3VIN 6
SR 8
VCC
2
VCC
3
S1
5
S2
4 G
N D
1
U7 SI9706DY
2 3 1
1 4 7
U9A SSHC02
+5V+3.3V
VGAPWR
+3.3V
11 12 13
1 4 7
U9D SSHC02
+3.3V
+3.3V
C4
SC1000P50V3MX
C49 SC10U16V
C48 SC1U16V5ZY
VGAPWR
DVCC Close 105(MGNDC),108(MVCCC) PIN
C50 SCD1U
C6 SCD1U
C5 SC10U16V
C14 SCD1U
C20 SC10U16V
C11 SC10U16V
VRAMVCC
Close 66(DVCC)PIN & 63,89(GND)PIN
+5V
+3.3V
12
R31 0R3
1 2
R32 DUMMY-R3
1
5 6 4
1 4 7
U9B SSHC02
1 2
R27 100KR3
C27
SCD1U
3.3V/5V#
+3.3V
13 12
1 4 7
U13F SSHC04
5VIN 7
3.3VIN 6
SR 8
VCC
2
VCC
3
S1
5
S2
4 G
N D
1
U6 SI9706DY
LCDPWR
5VIN 7
3.3VIN 6
SR 8
VCC
2
VCC
3
S1
5
S2
4 G
N D
1
U8 SI9706DY
DVCC
8 9 10
1 4 7
U9C SSHC02
+3.3V
5 6
1 4 7
U13C SSHC04
+3.3V
9 8
1 4 7
U13D SSHC04
+3.3V
LVC , VHC OR LCX
NOT INS.
2
4
C46 SCD01U C22 SCD01U
C21 SCD1U C47 SCD1U
ENAVDD
LCD_3/5V#
CVCC1 CVCC0
RGBGND
11 10
1 4 7
U13E SSHC04
+3.3V
C32 SCD1U C45 SCD1U
1 2
R25 33R3
1 2
R26 33R3
C24 SC10U16V C23 SC10U16V
VGAPWR
12
L4 HF70ACB
C7 SC10U16V C8
SCD01U
C9 SCD1U
AVCC
RGBGND RGBGND
VOLTAGE SWITCH
LCD_3/5V# ENAVDD
00 01 10 11
LCDPWR
S1 S2 0 1 0 0
0 0 0 1