at91sam9263 ATMEL Corporation, at91sam9263 Datasheet - Page 33

• Manufacturer Part Number: at91sam9263
• Description: At91 Arm Thumb Microcontrollers
• Manufacturer: ATMEL Corporation

Table 10-1.
Note:
10.2.1
10.2.1.1
10.2.1.2
10.2.1.3
10.3
6249D–ATARM–20-Dec-07
Peripheral ID
Setting AIC, SYSC, UHP and IRQ0 - 1 bits in the clock set/clear registers of the PMC has no effect.
Peripherals Signals Multiplexing on I/O Lines
29
30
31
Peripheral Interrupts and Clock Control
System Interrupt
External Interrupts
Timer Counter Interrupts
AT91SAM9263 Peripheral Identifiers (Continued)
Peripheral Mnemonic
The System Interrupt in Source 1 is the wired-OR of the interrupt signals coming from:
The clock of these peripherals cannot be deactivated and Peripheral ID 1 can only be used
within the Advanced Interrupt Controller.
All external interrupt signals, i.e., the Fast Interrupt signal FIQ or the Interrupt signals IRQ0 to
IRQ1, use a dedicated Peripheral ID. However, there is no clock control associated with these
peripheral IDs.
The three Timer Counter channels interrupt signals are OR-wired together to provide the inter-
rupt source 19 of the Advanced Interrupt Controller. This forces the programmer to read all
Timer Counter status registers before branching the right Interrupt Service Routine.
The Timer Counter channels clocks cannot be deactivated independently. Switching off the
clock of the Peripheral 19 disables the clock of the 3 channels.
The AT91SAM9263 device features 5 PIO controllers, PIOA, PIOB, PIOC, PIOD and PIOE,
which multiplex 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 define how the I/O lines of the peripherals A and B are
multiplexed on the PIO Controllers. The two columns “Function” and “Comments” have been
inserted in this table for the user’s own comments; they may be used to track how pins are
defined in an application.
Note that some peripheral functions which are output only may be duplicated within both tables.
The column “Reset State” indicates whether the PIO Line resets in I/O mode or in peripheral
mode. If I/O is specified, the PIO Line resets in input with the pull-up enabled, so that the device
• the SDRAM Controller
• the Debug Unit
• the Periodic Interval Timer
• the Real-Time Timer
• the Watchdog Timer
• the Reset Controller
• the Power Management Controller
UHP
AIC
AIC
Advanced Interrupt Controller
Advanced Interrupt Controller
Peripheral Name
USB Host Port
AT91SAM9263 Preliminary
External Interrupt
IRQ0
IRQ1
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