
UM016905-1207 Schematics
MDS General-Purpose Board Development Kit
User Manual
26
Figure 17. MDS-GP Board Schematic (2 of 8)
5
5
4
4
3
3
2
2
1
1
D D
C C
B B
A A
RS232 - 1
RS232 - 2
COMMUNICATIONS
96C0943-001
B
MDS General Pur
ose Platform
ZiLOG, Inc.
532 Race Street
San Jose, CA 95126
B
28Wednesda
, A
ril 28, 2004
Title
Size Document Number Rev
Date: Sheet of
-RS485_EN
PD0
PC5
PD1
-RS232_1_EN
GND
RTS0
RTS0
GND
RxD0
CTS0
VCC_33V
TxD0
RxD0
GND
CTS0
TxD0
PC1
PC3
PC0
PD1
PD3
PD0
PD2
RTS1
GND
RTS1
GND
GND
RXD1
RxD1
GND
-RS232_2_EN
TXD1
VCC_33V
VCC_33V
TXD1_TTL
CTS1
TXD1
CTS1
RXD1_TTL
RXD1_TTL
I2CSCL
I2CSDA
TXD1_TTL
-RF_EN
-GPS_EN
-RS485_EN
-IRDA_EN
-GPS_EN
-SWUART_EN
-RS232_1_EN
-RS232_2_EN
-RF_EN
-RS232_1_EN
-IRDA_EN
-GPS_EN
-RS232_2_EN
-RF_EN
-SWUART_EN
VCC_33V
VCC_33V
GND
-RS485_EN
VCC_33V
VCC_33V
-SWUART_EN
VCC_12V_IN
VCC_33V
VCC_5V
VCC_5V
VCC_33V
VCC_5V
VCC_5V
C5
0.1uF
J4
RS485
1
2
3
4
C8
0.1uF
R4
10K
R5
10K
C11
0.1uF
C6
0.1uF
R1
10K
C10
0.1uF
R11
10K
R6
10K
R9
10K
C4
0.1uF
R10
10K
U1
SN74CBT3125C
1
2
4
5
9
12
10
13
3
6
8
11
14
7
1OE
1A
2OE
2A
3A
4A
3OE
4OE
1B
2B
3B
4B
VCC
GND
C2
0.1uF
R2
10K
U5
SN74CBT3125C
1
2
4
5
9
12
10
13
3
6
8
11
14
7
1OE
1A
2OE
2A
3A
4A
3OE
4OE
1B
2B
3B
4B
VCC
GND
J2
HEADER 7X2
2
4
6
8
10
12
14
1
3
5
7
9
11
13
U4
SN74CBT3125C
1
2
4
5
9
12
10
13
3
6
8
11
14
7
1OE
1A
2OE
2A
3A
4A
3OE
4OE
1B
2B
3B
4B
VCC
GND
R12
120
U3 MAX3222
1
2
4
5
6
13
12
15
10
3
7
17
8
16
9
20
1918
11
14
EN
C1+
C1-
C2+
C2-
T1IN
T2IN
R1OUT
R2OUT
V+
V-
T1OUT
T2OUT
R1IN
R2IN
SHDN
VCCGND
NC
NC
C1
0.1uF
C7
0.1uF
R3
10K
J1
CON10A
1
3
5
7
9
2
4
6
8
10
U6 MAX3222
1
2
4
5
6
13
12
15
10
3
7
17
8
16
9
20
1918
11
14
EN
C1+
C1-
C2+
C2-
T1IN
T2IN
R1OUT
R2OUT
V+
V-
T1OUT
T2OUT
R1IN
R2IN
SHDN
VCCGND
NC
NC
J3
CON10A
1
3
5
7
9
2
4
6
8
10
C3
0.1uF
U7A
74LVC04/SO
1 2
147
C9
0.1uF
J5
RT_1
1
2
U8
DS1487
1
2
3
4 5
6
7
8
RO
RE
DE
DI GND
A
B
VCC
R7
10K
U2
PCA9554
1
2
3
4
5
6
7
8 9
10
11
12
13
14
15
16
A0
A1
A2
D0
D1
D2
D3
GND D4
D5
D6
D7
INT
SCL
SDA
VCC
PD1
PD3
PD2
PD0
GPS_RXD
GPS_PPS
RF_RXD
RF_CTS
GPS_TXD
RF_TXD
RF_RTS
PC0
PC1
PC3
PC2
I2CSDA
I2CSCL
-IRDA_EN
I2C_27
-RF_EN
PC5
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