at91sam9g20-cu ATMEL Corporation, at91sam9g20-cu Datasheet - Page 366

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

29.4
Figure 29-3. I/O Line Control Logic
366
Output Enable
Output Enable
Peripheral A
Peripheral B
Functional Description
Peripheral A
Peripheral B
PIO_BSR[0]
PIO_ASR[0]
AT91SAM9G20 Preliminary
Output
Output
PIO_ABSR[0]
PIO_OER[0]
PIO_ODR[0]
The PIO Controller features up to 32 fully-programmable I/O lines. Most of the control logic asso-
ciated to each I/O is represented in
represents but one of up to 32 possible indexes.
1
1
0
0
PIO_OSR[0]
PIO_IFER[0]
PIO_IFDR[0]
PIO_SODR[0]
PIO_CODR[0]
PIO_IFSR[0]
PIO_PER[0]
PIO_PDR[0]
Glitch
Filter
PIO_ODSR[0]
PIO_PSR[0]
PIO_PDSR[0]
1
0
PIO_IER[31]
PIO_IDR[31]
PIO_IER[0]
PIO_IDR[0]
1
0
1
0
Detector
Edge
PIO_IMR[31]
PIO_ISR[31]
PIO_IMR[0]
PIO_ISR[0]
PIO_MDER[0]
PIO_MDDR[0]
Figure
PIO_MDSR[0]
29-3. In this description each signal shown
(Up to 32 possible inputs)
1
0
0
1
PIO_PUER[0]
PIO_PUDR[0]
PIO_PUSR[0]
PIO Interrupt
Peripheral B
Peripheral A
Input
Input
6384B–ATARM–15-Dec-08
Pad