
Board Description
3.2
AT91SAM9RL Block Diagram
Figure 3-1.
MASTER
AT91SAM9RL Block Diagram
SLAVE
TST
System Controller
JTAG Selection and Boundary Scan
HS UTMI
Transceiver
D0-D15
FIQ
IRQ
DRXD
DTXD
AIC
DBGU
PDC
In-Circuit Emulator
ARM926EJ-S Processor
USB
Device
HS
LCDC
EBI
CompactFlash
NAND Flash
A0/NBS0
A1/NBS2/NWR2
A2-A15
A16/BA0
A17/BA1
NCS0
PCK0-PCK1
PLLRCA
XIN
XOUT
PLLA
OSC
12M
UPLL
PMC
TCM
Interface
ITCM DTCM
ICache
4 Kbytes
I
DCache
4 Kbytes
D
DMA
6-layer AHB Bus Matrix
DMA
& ECC
SDRAM
Controller
NCS1/SDCS
NRD/CFOE
NWR0/NWE/CFWE
NWR1/NBS1/CFIOR
NWR3/NBS3/CFIOW
SDCK, SDCKE
RAS, CAS
SDWE, SDA10
WDT
PIT
NWAIT
A23-A24 A18-A20
XIN32
XOUT32
RC
OSC
32K
4
GPBREG
SRAM
64K Bytes
ROM
32K Bytes
Peripheral
Bridge
Peripheral
DMA
Controller
2-channel
DMA
Static
A21/NANDALE
A22/NANDCLE
A25/CFRNW
SHDN
WKUP
SHDC
RTT
RTC
APB
Memory
Controller
D16-D31
NCS4/CFCS0
VDDBU
VDDCORE
NRST
POR
POR
RSTC
PDC
MCI
PDC
TWI0 TWI1
PDC
USART0
USART1
USART2
USART3
PDC
SPI
PWM
TC0
TC1
TC2
PDC
AC97
PDC
SSC0
SSC1
PDC Touch
Screen
Controller
6-channel 10-bit ADC
NCS5/CFCS1
NCS3/NANDCS
NCS2
CFCE1-CFCE2
NANDOE, NANDWE
PIOA
PIOC
PIOB
PIOD
3.3
3.4
3.5
3-4
Microcontroller
One AT91SAM9RL64 217-ball LFBGA fitted on board
Memory
32 Kbytes of Internal ROM
64 Kbyte of Internal SRAM
Atmel serial DataFlash
64 Mbytes of SDRAM memory (32-bit bus width)
256 Mbytes of NAND Flash memory (8-bit bus width)
TWI serial EEPROM (footprint only)
Clock Circuitry
12 MHz standard crystal for the embedded oscillator
AT91SAM9RL-EK Evaluation Board User Guide
6325C–ATARM–22-Jul-10