... the analog plus comp
a
TM
EXAR Corporation 48720 Kato Road, Fremont, CA 94538 Phone (510)-668-7000, Fax (510)-668-7030 PRELIMINARY
20
XRD9827REF B
XRD9827 REFERENCE BOARD
B
33Thursday, July 23, 1998
H:\PROJECT\ORCADWIN\9827\9827REFB.DSN
Title
Size Document Number Rev
Date: Sheet of
AVDD
DVDD
AGND
AGND
AGND
DGND
DGND
DGND
DVDD
DGND
DGND
DVDD
DGND
DGND
DGND
DVDD
AVDDDVDD
DGND
WEN
RST
SP
CISCLK
RLED
GLED
BLED
RCLK
AUTOFD
ACK
STROBE
CISOUT
DB0
DB1
DB2
DB3
DB4
DB5/SCLK
DB6/SDATA
DB7/LD
VDCEXT
WCLK1
WCLK2
MSB
LSB
VCC
GND (ANALOG)
GND (FRAME)
RLED
GLED
BLED
CISCLK
SP
VREF
MODE
CISOUT
LED ANODE
O0
O1
O2
O3
O4
O5
O6
O7
SP
CISCLK
RLED
GLED
BLED
STROBE AUTOFD
INIT
O7
O6
O5
O4
O3
O2
O1
O0
O7
O6
O5
O4
O3
O2
O1
O0
RGND
GGND
CISCLKN
BGND
SPN
O[7..0]
J2
DB25
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
R24
300
R26
300
R28
10K
R29
10K
R30
10K
C25
0.1uF C26
0.01uF C27
0.01uF
JP4
HEADER 12 TO CIS
1
2
3
4
5
6
7
8
9
10
11
12
C23
10uF
C30
47uF
C31
0.1uF
U7B
74HC04
3 4
U7C
74HC04
5 6
U7D
74HC04
9 8
U7F
74HC04
13 12
14
7
U7E
74HC04
11 10
U7A
74HC04
12
U6
CY7C4261
D5
1
D4
2
D3
3
D2
4
D1
5
D0
6
PAF*
7
PAE*
8
GND
9
REN1*
10
RCLK
11
REN2*
12
OE*
13
EF*
14
FF*
15
Q0
16
D8
30
D7
31
D6
32
Q1
17
Q2
18
Q3
19
Q4
20
Q5
21
Q6
22
Q7
23
Q8
24
DVDD
25
WEN2*
26
WCLK
27
WEN1*
28
RS*
29
U8
CY7C4261
D5
1
D4
2
D3
3
D2
4
D1
5
D0
6
PAF*
7
PAE*
8
GND
9
REN1*
10
RCLK
11
REN2*
12
OE*
13
EF*
14
FF*
15
Q0
16
D8
30
D7
31
D6
32
Q1
17
Q2
18
Q3
19
Q4
20
Q5
21
Q6
22
Q7
23
Q8
24
DVDD
25
WEN2*
26
WCLK
27
WEN1*
28
RS*
29
C21
0.1uF C22
0.1uF
R27 OPEN
R25
OPEN
JP3
JUMPER
1
2
3
C28
100uF
C24
1uF
Q1
NPN_TO18
2
1 3
Q2
NPN_TO18
2
1 3
Q3
NPN_TO18
2
1 3
R32 100
R33 100
R34 100
R31 100
C33
47uF
C29
0.1uF