AT91RM9200-CI-002 Atmel, AT91RM9200-CI-002 Datasheet - Page 348

• Manufacturer Part Number: AT91RM9200-CI-002
• Description: IC ARM9 MCU 256 BGA
• Manufacturer: Atmel
• Series: AT91SAMr

Specifications of AT91RM9200-CI-002

• Core Processor: ARM9
• Core Size: 16/32-Bit
• Speed: 180MHz
• Connectivity: EBI/EMI, Ethernet, I²C, MMC, SPI, SSC, UART/USART, USB
• Peripherals: POR
• Number Of I /o: 122
• Program Memory Size: 128KB (128K x 8)
• Program Memory Type: ROM
• Ram Size: 48K x 8
• Voltage - Supply (vcc/vdd): 1.65 V ~ 1.95 V
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 256-BGA
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Eeprom Size: -
• Data Converters: -

Figure 27-3. I/O Line Control Logic
27.4.1
348
Output Enable
Output Enable
Peripheral A
Peripheral B
Peripheral A
Peripheral B
PIO_ASR
PIO_BSR
Output
Output
AT91RM9200
Pull-up Resistor Control
PIO_ABSR
PIO_OER
PIO_ODR
1
1
0
0
Each I/O line is designed with an embedded pull-up resistor. The internal pull-ups have a typical
value of 200 kOhm (see the product electrical characteristics for more details about this value).
The pull-up resistor can be enabled or disabled by writing respectively PIO_PUER (Pull-up
Enable Register) and PIO_PUDR (Pull-up Disable Resistor). Writing in these registers results in
setting or clearing the corresponding bit in PIO_PUSR (Pull-up Status Register). Reading a 1 in
PIO_PUSR means the pull-up is disabled and reading a 0 means the pull-up is enabled.
Control of the pull-up resistor is possible regardless of the configuration of the I/O line.
PIO_OSR
PIO_IFDR
PIO_IFER
PIO_CODR
PIO_SODR
PIO_IFSR
Glitch
PIO_PER
PIO_PDR
Filter
PIO_ODSR
PIO_PSR
1
0
PIO_PDSR
PIO_IER
PIO_IDR
1
0
1
0
Detector
Edge
PIO_IMR
PIO_ISR
PIO_MDER
PIO_MDDR
PIO_MDSR
1
0
1
1
0
0
PIO_PUDR
PIO_PUER
PIO Interrupt
PIO_PUSR
Peripheral B
Peripheral A
Input
Input
1768I–ATARM–09-Jul-09
Pad