AT91SAM7S256 ATMEL Corporation, AT91SAM7S256 Datasheet - Page 16

• Manufacturer Part Number: AT91SAM7S256
• Description: AT91 ARM THUMB-BASED MICROCONTROLLERS
• Manufacturer: ATMEL Corporation

System Controller
Figure 5. System Controller Block Diagram
16
AT91SAM7S256 Summary Preliminary
PA0-PA31
PLLRC
NRST
XOUT
XIN
RCOSC
dbgu_irq
BOD
POR
OSC
periph_irq[2..14]
PLL
pmc_irq
rstc_irq
wdt_irq
en
pit_irq
rtt_irq
periph_nreset
usb_suspend
periph_nreset
periph_nreset
periph_nreset
periph_nreset
periph_clk[2]
proc_nreset
cal
gpnvm[0]
dbgu_rxd
dbgu_rxd
irq0-irq1
SLCK
debug
debug
SLCK
MAINCK
The System Controller manages all vital blocks of the microcontroller: interrupts, clocks,
power, time, debug and reset.
SLCK
MCK
MCK
PLLCK
SLCK
int
fiq
idle
flash_wrdis
ice_nreset
jtag_nreset
flash_poe
gpnvm[1]
System Controller
bod_rst_en
Management
Real-Time
Advanced
Watchdog
Controller
Controller
Controller
Controller
Interrupt
Periodic
Interval
Debug
Power
Reset
Timer
Timer
Timer
PIO
Unit
wdt_fault
WDRPROC
int
dbgu_irq
force_ntrst
dbgu_txd
pit_irq
rtt_irq
wdt_irq
periph_nreset
proc_nreset
rstc_irq
periph_clk[2..14]
pck[0-2]
PCK
UDPCK
MCK
pmc_irq
idle
periph_irq{2]
irq0-irq1
fiq
dbgu_txd
Regulator
Controller
Voltage
Mode
ice_nreset
force_ntrst
periph_clk[4..14]
periph_clk[11]
periph_nreset
periph_irq[11]
usb_suspend
periph_nreset
periph_irq[4..14]
proc_nreset
proc_nreset
in
out
enable
jtag_nreset
cal
flash_wrdis
standby
UDPCK
debug
flash_poe
cal
gpnvm[0..1]
PCK
MCK
security_bit
nirq
nfiq
Boundary Scan
TAP Controller
USB Device
ARM7TDMI
Peripherals
Embedded
Embedded
Regulator
Controller
Memory
Voltage
Flash
Port
6117AS–ATARM–20-Oct-04