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DECOUPLING
DECOUPLING
3V3
U3 PINS 39, 42
U3 PINS 8, 21, 50, 60
+
C7
C8
C9
C12
100nF
100nF
68uF
100nF
LED1
R10
GND
3V3
POWER
150
U3
C19 100nF
1
3V3
BCTRIG
BCTRIG
GND
2
RAMEDC
3
nPCS0
SW3
CE
4
GND
MODE
5
MOSI
RUN
SI
6
MSCK
SCK
7
MISO
R13
SO
8
3V3
100K
VDD
9
MCLK
MCLK
10
GND
GND
11
RT1A0
RT1A0
12
RT1A1
RT1A1
13
RT1A2
RT1A2
14
nMR
MR
15
RT1A3
RT1A3
16
RT1A4
3V3
RT1A4
OSC1
50.0MHz
J7
1
3V3
3
3V3
5
READY
7
AUTOEN
9
nPCS0
11
MOSI
MSCK
13
15
MISO
17
RT1ENA
19
EECOPY
nMR
21
23
CPY RQ
25
BCENA
27
3V3
3V3
29
EEPROM LOAD
AN‐1590, Rev. New
3V3
3V3
C10
C13
C11
100nF
100nF
100nF
IRQ
TP13
BENDI
TEST
RT1LOCK
MTSTOFF
BCENA
BUSA
HI-6131 PQFP
VDD
BUSA
BUSB
MODE = 0 (EXT TRANSCEIVER)
VDD
COMP = 0 (NO PIN, INT PULL-DN)
BUSB
TEST = 0 (NORMAL)
RT2ENA
T0
T1
T2
T3
nTXA
TXA
nTXB
TXB
2
4
6
8
10
12
14
16
18
20
22
24
26
28
SW6
30
HOLT INTEGRATED CIRCUITS
3V3
3V3
+
C15
C16
C17
C18
100nF
4.7uF
100nF
100nF
BC MESSAGES - 1 & 2
RT MESSAGES - 2 & 3
48
3V3
47
GND
46
RT1LOCK
45
GND
44
BCENA
43
42
3V3
41
40
39
3V3
38
37
GND
36
nRXA
35
RXA
34
nRXB
33
RXB
SW5
3V3
ON (CLOSED)
1
0
1
2
3
4 5
R16
Title
HI-1590 Dual 1553 Transceiv er with SPI Demo Board - Message Generator
47K
Size
Document Number
A
<Doc>
Date:
J6
Header 1x4
TP9
TP10
TP11
GND
GND
3V3
C14 68uF
J12
nECS1
1
nECS
R11
2
nECS2
3
1
CS
2
EMISO
CON3
SO
3
WP
4
3V3
GND
R12
U2 25LC512 8-SOIC
100K
STOP
nMR
R14
SW4
C20
1
CS
2
100nF
EMISO
SO
3
WP
4
GND
U4 25LC512 8-SOIC
TP14
R15
ACTIVE
330
LED2
ACTIVE
Wednesday , July 09, 2014
Sheet
10/10/14
3V3
10K
8
VCC
7
HOLD
6
ESCK
SCK
5
EMOSI
SI
3V3
10K
8
VCC
7
HOLD
6
ESCK
SCK
5
EMOSI
SI
nMR
BCTRIG
3V3
GND
GND
Rev
A
2
of
3
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