at91sam9g20-cu ATMEL Corporation, at91sam9g20-cu Datasheet - Page 22

• Manufacturer Part Number: at91sam9g20-cu
• Description: At91 Arm Thumb Microcontrollers
• Manufacturer: ATMEL Corporation

9.1
Figure 9-1.
22
System Controller Block Diagram
AT91SAM9G20 Preliminary
PC0-PC31
PB0-PB31
PA0-PA31
OSCSEL
XOUT32
AT91SAM9G20 System Controller Block Diagram
VDDBU
WKUP
SHDN
NRST
XIN32
XOUT
XIN
VDDCORE
VDDBU
dbgu_irq
CLOCK
SLOW
periph_irq[2..24]
pmc_irq
MAIN
POR
POR
OSC
OSC
OSC
wdt_irq
rstc_irq
PLLA
PLLB
RC
periph_clk[2..4]
pit_irq
backup_nreset
rtt_irq
periph_nreset
periph_nreset
periph_nreset
periph_nreset
proc_nreset
dbgu_rxd
dbgu_rxd
irq0-irq2
debug
debug
SLCK
SLCK
SLCK
SLCK
MCK
MCK
backup_nreset
idle
fiq
int
SLCK
rtt0_alarm
MAINCK
PLLACK
PLLBCK
por_ntrst
jtag_nreset
System Controller
Management
Shut-Down
Watchdog
Real-Time
Controllers
Advanced
Controller
Controller
Controller
Controller
Interrupt
Periodic
Interval
Debug
Power
Reset
Timer
Timer
Timer
PIO
Unit
wdt_fault
WDRPROC
4 General-Purpose
Backup Registers
UHPCK
int
dbgu_irq
dbgu_txd
pit_irq
wdt_irq
rstc_irq
periph_nreset
proc_nreset
backup_nreset
rtt_irq
rtt_alarm
periph_clk[2..27]
pck[0-1]
PCK
MCK
pmc_irq
idle
periph_irq[2..4]
irq0-irq2
fiq
dbgu_txd
UDPCK
VDDBU Powered
VDDCORE Powered
por_ntrst
periph_clk[6..24]
periph_irq[6..24]
periph_clk[20]
periph_clk[10]
periph_nreset
periph_nreset
periph_irq[20]
periph_nreset
periph_irq[10]
periph_nreset
proc_nreset
in
out
enable
jtag_nreset
UHPCK
UDPCK
debug
MCK
PCK
nirq
nfiq
ntrst
Boundary Scan
TAP Controller
ARM926EJ-S
Peripherals
Embedded
Bus Matrix
USB Host
Device
USB
Port
Port
6384B–ATARM–15-Dec-08