ATEVK1105 Atmel, ATEVK1105 Datasheet - Page 462
ATEVK1105
Manufacturer Part Number
ATEVK1105
Description
KIT EVAL FOR AT32UC3A0
Manufacturer
Atmel
Series
AVR®32r
Type
MCUr
Datasheets
1.ATAVRONE-PROBECBL.pdf
(16 pages)
2.ATEVK1104.pdf
(826 pages)
3.ATEVK1105.pdf
(28 pages)
Specifications of ATEVK1105
Contents
Evaluation Board, Software and Documentation
Processor To Be Evaluated
AT32UC3A0512
Processor Series
AVR
Data Bus Width
32 bit
Interface Type
USART, TWI, USB, SPI, Ethernet
Operating Supply Voltage
3.3 V
Silicon Manufacturer
Atmel
Core Architecture
AVR
Core Sub-architecture
AVR UC3
Silicon Core Number
AT32UC3A0512
Silicon Family Name
AVR
Kit Contents
Board CD Docs
Rohs Compliant
Yes
For Use With/related Products
AT32UC3A0
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
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29.7.5
Register Name:
Access Type:
This register points to the entry in the receive buffer queue (descriptor list) currently being used. It is written with the start
location of the receive buffer descriptor list. The lower order bits increment as buffers are used up and wrap to their original
values after either 1024 buffers or when the wrap bit of the entry is set.
Reading this register returns the location of the descriptor currently being accessed. This value increments as buffers are
used. Software should not use this register for determining where to remove received frames from the queue as it con-
stantly changes as new frames are received. Software should instead work its way through the buffer descriptor queue
checking the used bits.
Receive buffer writes also comprise bursts of two words and, as with transmit buffer reads, it is recommended that bit 2 is
always written with zero to prevent a burst crossing a 1K boundary, in violation of the System Bus specification.
• ADDR:
Written with the address of the start of the receive queue, reads as a pointer to the current buffer being used.
32058J–AVR32–04/11
31
23
15
7
Receive buffer queue pointer address
Receive Buffer Queue Pointer Register
30
22
14
RBQP
6
Read/Write
29
21
13
5
ADDR
28
20
12
4
ADDR
ADDR
ADDR
27
19
11
3
26
18
10
2
25
17
9
1
–
AT32UC3A
24
16
8
0
–
462
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