AT32AP7001-ALUT Atmel, AT32AP7001-ALUT Datasheet - Page 236

• Manufacturer Part Number: AT32AP7001-ALUT
• Description: IC MCU 32BIT AVR32 208-LQFP
• Manufacturer: Atmel
• Series: AVR®32 AP7r

Specifications of AT32AP7001-ALUT

• Core Processor: AVR
• Core Size: 32-Bit
• Speed: 150MHz
• Connectivity: EBI/EMI, I²C, MMC, PS2, SPI, SSC, UART/USART, USB
• Peripherals: AC'97, DMA, I²C, POR, PWM, WDT
• Number Of I /o: 90
• Program Memory Type: ROMless
• Ram Size: 32K x 8
• Voltage - Supply (vcc/vdd): 1.65 V ~ 1.95 V
• Data Converters: D/A 2x16b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 208-LQFP
• Data Bus Width: 32 bit
• Data Ram Size: 32 KB
• Interface Type: EBI, ISI, MCI, PS2, SPI, TWI, USB
• Maximum Clock Frequency: 150 MHz
• Number Of Programmable I/os: 90
• Number Of Timers: 3
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• Minimum Operating Temperature: - 40 C
• On-chip Dac: 16 bit, 1 Channel
• Package: 208PQFP
• Device Core: AVR32
• Family Name: AT32
• Maximum Speed: 150 MHz
• Operating Supply Voltage: 1.8 V
• For Use With: ATAVRONEKIT - KIT AVR/AVR32 DEBUGGER/PROGRMMRATNGW100 - KIT AVR32 NETWORK GATEWAYATSTK1000 - KIT STARTER FOR AVR32AP7000
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Program Memory Size: -
• Lead Free Status / Rohs Status: Details

19.5.2
19.5.3
19.5.4
32015G–AVR32–09/09
Memory Pointers
Transfer Counters
Data Transfers
Each peripheral is connected to the PDC by a receiver data channel and a transmitter data
channel. Each channel has an internal 32-bit memory pointer. Each memory pointer points to a
location anywhere in the memory space (on-chip memory or external bus interface memory).
Depending on the type of transfer (byte, half-word or word), the memory pointer is incremented
by 1, 2 or 4, respectively for peripheral transfers. The size of the transfer is setup up in the
peripheral’s control register and automatically sensed by the PDC. The size is always rounded
up to wither byte, half-word or word.
If a memory pointer is reprogrammed while the PDC is in operation, the transfer address is
changed, and the PDC performs transfers using the new address.
There is one internal 16-bit transfer counter for each channel used to count the size of the block
already transferred by its associated channel. These counters are decremented after each data
transfer. When the counter reaches zero, the transfer is complete and the PDC stops transfer-
ring data.
If the Next Counter Register is equal to zero, the PDC disables the trigger while activating the
related peripheral end flag.
If the counter is reprogrammed while the PDC is operating, the number of transfers is updated
and the PDC counts transfers from the new value.
Programming the Next Counter/Pointer registers chains the buffers. The counters are decre-
mented after each data transfer as stated above, but when the transfer counter reaches zero,
the values of the Next Counter/Pointer are loaded into the Counter/Pointer registers in order to
re-enable the triggers.
For each channel, two status bits indicate the end of the current buffer (ENDRX, ENTX) and the
end of both current and next buffer (RXBUFF, TXBUFE). These bits are directly mapped to the
peripheral status register and can trigger an interrupt request to the Interrupt Controller.
The peripheral end flag is automatically cleared when one of the counter-registers (Counter or
Next Counter Register) is written.
Note: When the Next Counter Register is loaded into the Counter Register, it is set to zero.
The peripheral triggers PDC transfers using transmit (TXRDY) and receive (RXRDY) signals.
When the peripheral receives an external character, it sends a Receive Ready signal to the PDC
which then requests access to the system bus. When access is granted, the PDC starts a read
of the peripheral Receive Holding Register (RHR) and then triggers a write in the memory.
After each transfer, the relevant PDC memory pointer is incremented and the number of trans-
fers left is decremented. When the memory block size is reached, a signal is sent to the
peripheral and the transfer stops.
The same procedure is followed, in reverse, for transmit transfers.
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