Configuration
AT91SAM9M10-G45-EK User Guide
5-3
6495B–ATARM–21-Apr-10
5.4
Miscellaneous Configuration Items
N.P = not populated
P = populated
5.5
PIO Configuration
5.5.1
Peripheral Signals Multiplexing on I/O Lines
The AT91SAM9M10 product features 5 PIO controllers, PIOA, PIOB, PIOC, PIOD and PIOE, which mul-
tiplex the I/O lines of the peripheral set. Each PIO Controller controls up to 32 lines. Each line can be
assigned to one of two peripheral functions, A or B. The multiplexing tables in the following paragraphs
define how the I/O lines of peripherals A and B are multiplexed on the PIO Controllers.
5.5.2
Multiplexing on PIO Controller A (PIOA)
"R.Select" = connection selectable via an on-board resistor (default not populated)
Table 5-3.
Miscellaneous Configuration
Designation
Default
Setting
Feature
R34
N.P
JTAGSEL
R35
P
Connect TSADVREF to VDDANA (may be used for specific filtering)
R36
P
Connect GNDANA to GND (may be used for specific filtering)
R38
P
Force TST pin to GND (chip is set in non-test mode = normal operation mode)
R63
N.P
Write protect NAND Flash (mount a 0-ohm resistor to write-protect the NAND
Flash device)
R68
N.P
Write protect serial DataFlash (mount a 0-ohm resistor to write-protect the serial
Flash device)
R75
N.P
External clock Audio AC97 (mount a 0-ohm resistor to connect it)
R91,R92
R93,R94
ICE interface reset and clocking schemes (see
R100, R103
to R105,
R108 to
R110, R112,
R114, C174,
C175, Y5
Ethernet interface, MII mode (see
Section 5.2 ”ETHERNET Configuration”
Y6, R184,
R186
N.P
External 13 MHz oscillator (option) for the on-board video composite encoder
TP1
GND Test point
TP2
GND Test point
TP3
GND Test point
TP4
GND Test point
