Atmel AT91SAM9XE-EK 4.2 JTAG/ICE, 4.3 Microcontroller Clock, 4.4 Memory Configuration

4-2 AT91SAM9XE-EK Evaluation Board User Guide
6311A–ATARM–04-Feb-08
4.2 JTAG/ICE
4.3 Microcontroller Clock
4.4 Memory Configuration
Table 4-2. JTAG/ICE Configuration
Designation Default Setting Feature
S1 Opened Disables the ICE NTRST input
S2 Opened Selects ICE mode or JTAG mode
S3 Opened Disables TCK <-> RTCK local loop. If S3 is closed, R13 must be
unsoldered.
R13 Soldered Enables the ICE RTCK return. S3 must be opened
R14 Soldered Enables the ICE NRST input
Table 4-3. Microcontroller Clock Configuration
Designation Default Setting Feature
R18/R20 Soldered Enables the use of 18.432MHz crystal. If an external clock is used,
R18/R20 must be unsoldered and S4 closed.
S4 Opened
J9 Slow Clock Setting. See Table 4-1.
Table 4-4. Memory Configuration
Designation Default Setting Feature
SDRAM
R31
R32
Soldered
Soldered
Enables MN7 Chip select access
Enables MN8 Chip select access
NAND Flash (MN6x)
R34
S6
Soldered
Opened
Enables the use of Ready Busy signal
Disables write protection.
SERIAL DATAFLASH (MN9)
S5 Opened Disables the write protection.
TWI SERIAL EEPROM (MN10)
R46
R47
Soldered
Soldered
Enables SCL access
Enables SDA access