30
C005383_10 CR80XX Integration Guide
10.3 – Development Board Jumpers
(continued)
Serial Polarity and Boot Select Jumpers
J5 selects whether or not the primary RS-232
data are inverted, and the combination of J6 and
SW2 will select the boot mode the kit comes up
in. The RS-232 data will be inverted if J5 has
pins 2-3 bridged, and will remain non-inverted if
the jumper is left in the default position of 1-2.
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 CR8000 RS232 Port 4 to J3.
Boot
Mode
J6
SW2
Description
1
1-2
Open
Normal Mode - Reader Application
2
1-2
Depressed
Upgrade Mode - Linux Application to upgrade
Reader Application
3
2-3
Open
Factory Restoration Mode
4
2-3
Depressed
U-Boot Upgrade Mode - Upgrade Linux OS
and Filesystem
J1
C1
C3
J7
J8
3
2
1
J9
J21
J25
J22
J20
J23
CR8000
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
EXPANDED
ILLUMINATION
VPI Engineering C0
05425_02.pcb
20 May 20
10
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
CR8000
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
EXPANDED
ILLUMINATION
VPI Engineering C0
05425_02.pcb
20 May 20
10
TX
RX
POLARITY
CTS
POLARITY
BOOT
SELECT
RX
J2
D1
J5
J6
F1
J19
J24
J3
U1
SPK1
U2