28
D027173_07 CR821X Dual Board Decoded Scan Engine Integration Guide
8.3 – Development Board Jumpers
(continued)
Serial Debug Jumpers
The serial debug jumper block of J4, J7 and
J8 determine whether or not RS232 Port 4 is
routed to J3, and allows a user to tap off of the
debug port on J2. J7 and J8 are shorted to
connect CR822x RS232 Port 4 to J3.
8.4 – Development Board Fuses
There are two fuses on the development
board. Both are used to protect the input
voltage line, VIN, but for different connection
options.
The standard cables provide VIN through the
RJ-50 connector, J1. The fuse that protects
the circuit when using the J1 connection
is F2. F2 is located on the back side of the
board, under the RJ-50 connector, J1.
If power is supplied through the Expanded
Illumination header (J19), the appropriate
fuse is F1. F1 is located on the front side of
the board next to J19.
Both fuses have the same part number:
• Code P/N: V005953
• Description: Fuse, 0.75 Amp 0603
• Manufacturer: Littelfuse
• Manufacturer P/N: 0467.750NR
J1
C1
C3
J7
J8
3
2
1
J9
J21
J25
J22
J20
J23
J10
J11
J12
J13
J14
J15
J16
J17
J18
C2
J4
TX
TX
RX
RX
D–
LED0
D+
LED1
RTS
TX
TRIGGER
TRIGGER
WAKE UP
LED1
BEEPER
LED0
RTS
CTS
SW1
WAKE UP
SW2
TRIGGER
VPI Eng
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C005425_02.pcb 20 M
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TX
RX
POLARITY
CTS
POLARITY
BOOT
SELECT
RX
J2
D1
J5
J6
F1
J19
J24
J3
U1
SPK1
U2
J1
C1
C3
J7
J8
3
2
1
J9
J21
J25
J22
J20
J23
J10
J11
J12
J13
J14
J15
J16
J17
J18
C2
J4
TX
TX
RX
RX
D–
LED0
D+
LED1
RTS
TX
TRIGGER
TRIGGER
WAKE UP
LED1
BEEPER
LED0
RTS
CTS
SW1
WAKE UP
SW2
TRIGGER
VPI Eng
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C005425_02.pcb 16 No
v 2010
TX
RX
POLARITY
CTS
POLARITY
BOOT
SELECT
RX
J2
D1
J5
J6
F1
J19
J24
J3
U1
SPK1
U2
C4
R1
D5
D6
R2
D3
D2
D4
C5
D7
Q1
Q2
D8
Q3
D10
F2
C7 C6
C10
R4
R6
R12
R14
R17
C14
R5
R8
R11
C11
C13
R16
R3 R7
C8 R9
R13
C12 R15
C9
R10
D9
