at91sam9263 ATMEL Corporation, at91sam9263 Datasheet - Page 435

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

30.5
6249D–ATARM–20-Dec-07
I/O Lines Programming Example
The programing example as shown in
configuration.
Table 30-1.
• 4-bit output port on I/O lines 0 to 3, (should be written in a single write operation), open-drain,
• Four output signals on I/O lines 4 to 7 (to drive LEDs for example), driven high and low, no
• Four input signals on I/O lines 8 to 11 (to read push-button states for example), with pull-up
• Four input signals on I/O line 12 to 15 to read an external device status (polled, thus no input
• I/O lines 16 to 19 assigned to peripheral A functions with pull-up resistor
• I/O lines 20 to 23 assigned to peripheral B functions, no pull-up resistor
• I/O line 24 to 27 assigned to peripheral A with Input Change Interrupt and pull-up resistor
with pull-up resistor
pull-up resistor
resistors, glitch filters and input change interrupts
change interrupt), no pull-up resistor, no glitch filter
PIO_OWER
PIO_OWDR
PIO_CODR
PIO_MDER
PIO_MDDR
PIO_SODR
PIO_PUDR
PIO_PUER
PIO_IFER
PIO_IFDR
PIO_PDR
PIO_OER
PIO_ODR
PIO_PER
PIO_ASR
PIO_BSR
Register
PIO_IDR
PIO_IER
Programming Example
Table 30-1
AT91SAM9263 Preliminary
Value to be Written
below is used to define the following
0x0FFF F0FF
0x0FFF FFFF
0x0FFF FFF0
0x0FFF FFF0
0x0000 FFFF
0x0FFF 0000
0x0FFF FF00
0x00FF F0FF
0x0F0F FF0F
0x0000 00FF
0x0000 0F00
0x0F00 0F00
0x0000 000F
0x00F0 00F0
0x0F0F 0000
0x00F0 0000
0x0000 000F
0x0000 0000
435