AT32UC3C1512C Automotive Atmel Corporation, AT32UC3C1512C Automotive Datasheet - Page 459
AT32UC3C1512C Automotive
Manufacturer Part Number
AT32UC3C1512C Automotive
Description
Manufacturer
Atmel Corporation
Datasheets
1.AT90CAN128_AUTOMOTIVE.pdf
(225 pages)
2.AT32UC3C0512C_AUTOMOTIVE.pdf
(1312 pages)
3.AT32UC3C0512C_AUTOMOTIVE.pdf
(107 pages)
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23.7
23.7.1
9166C–AVR-08/11
User Interface
Access Types
The GPIO controller manages all the GPIO pins on the 32-bit AVR microcontroller. The pins are
managed as 32-bit ports that are configurable through a Peripheral Bus (PB) interface. Each
port has a set of configuration registers. The overall memory map of the GPIO is shown below.
The number of pins and hence the number of ports is product specific.
Figure 23-6. Port Configuration Registers
In the peripheral muxing table in the Package and Pinout chapter each GPIO pin has a unique
number. Note that the PA, PB, PC, and PX ports do not necessarily directly correspond to the
GPIO ports. To find the corresponding port and pin the following formulas can be used:
GPIO port = floor((GPIO number) / 32), example: floor((36)/32) = 1
GPIO pin = GPIO number % 32, example: 36 % 32 = 4
Table 23-2
port address offset. The specific address of a configuration register is found by adding the regis-
ter offset and the port offset to the GPIO start address. One bit in each of the configuration
registers corresponds to a GPIO pin.
Most configuration register can be accessed in four different ways. The first address location can
be used to write the register directly. This address can also be used to read the register value.
The following addresses facilitate three different types of write access to the register. Performing
a “set” access, all bits written to one will be set. Bits written to zero will be unchanged by the
operation. Performing a “clear” access, all bits written to one will be cleared. Bits written to zero
will be unchanged by the operation. Finally, a toggle access will toggle the value of all bits writ-
shows the configuration registers for one port. Addresses shown are relative to the
Port 0 Configuration Registers
Port 1 Configuration Registers
Port 2 Configuration Registers
Port n Configuration Registers
n*0x200
0x0000
0x0200
0x0400
AT32UC3C
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