8-2
AT91CAP9A-DK Development Kit User Guide
6321B–CAP–02-Jul-07
8.2
Configuration Items
Notes:
1. Only one of these shall be mounted, to do otherwise will cause a short out of the power supply.
2. Exactly one of these must be set. No less, no more.
3. Refer to
to see the span of this IO bank. By default this voltage is fixed at 3.3V. Change
this setting only if you are sure of what you are doing...!
Table 8-1. AT91CAP9A-DKZ Configuration Items
Designation
Default Setting
Feature
RR1..RR7
all ON
PIO_D/EBI lines connect to the motherboard. Removing these 7 resistor networks will restrict
the routing of this part of the EBI bus to be local to the mezzanine. This is implemented for
signal integrity purposes, so that the tracks going down to the motherboard (unused when in
EBI mode) do not act as stubs, which could corrupt the high-speed EBI signals integrity.
R1, 2, 3
ON, OFF, OFF
DM_VCC selection. See schematics
TP1
-
Testpoint for DM_VREF injection if needed.
J22
ON
CAP VDDCORE circuit opener (current measurement purpose)
J8
ON
CAP VDDIOP0 circuit opener (current measurement purpose)
J9
ON
CAP VDDUTMI12 circuit opener (current measurement purpose)
J12
ON
CAP VDDIOM circuit opener (current measurement purpose)
J14
ON
CAP VDDBU circuit opener (current measurement purpose)
J15
ON
CAP VDDADC circuit opener (current measurement purpose)
J23
ON
CAP VDDUTMI33 circuit opener (current measurement purpose)
J6
ON
CAP VDDPLL12 circuit opener (current measurement purpose)
J7
ON
CAP VDDPLL circuit opener (current measurement purpose)
R21, 18, 20,
23
ON, OFF, ON, OFF
USB host port internal PHY selection. Selects either high-speed PHY or full-speed PHY.
J17
ON
Boot Mode Selection (BMS). Selects boot memory to be internal or external. Refer to
AT91CAP9 datasheet.
R44, 45, 46
ON, OFF, OFF
Selects VCCIO_4 voltage. Default 3.3V
R47, 48, 49
ON, OFF, OFF
Selects VCCIO_5 voltage. Default 3.3V
R50, 51, 52
ON, OFF, OFF
Selects VCCIO_6 voltage. Default 3.3V
R53,54, 55
ON, OFF, OFF
Selects VCCIO_8 voltage. Default 3.3V
Summary of Contents for AT91CAP9
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