SAM9XE512 Atmel Corporation, SAM9XE512 Datasheet - Page 683
SAM9XE512
Manufacturer Part Number
SAM9XE512
Description
Manufacturer
Atmel Corporation
Datasheets
1.SAM9260.pdf
(290 pages)
2.SAM9261.pdf
(248 pages)
3.SAM9XE128.pdf
(860 pages)
4.SAM9XE128.pdf
(48 pages)
Specifications of SAM9XE512
Flash (kbytes)
512 Kbytes
Pin Count
217
Max. Operating Frequency
180 MHz
Cpu
ARM926
Hardware Qtouch Acquisition
No
Max I/o Pins
96
Ext Interrupts
96
Usb Transceiver
3
Usb Speed
Full Speed
Usb Interface
Host, Device
Spi
2
Twi (i2c)
2
Uart
6
Ssc
1
Ethernet
1
Sd / Emmc
1
Graphic Lcd
No
Video Decoder
No
Camera Interface
Yes
Adc Channels
4
Adc Resolution (bits)
10
Adc Speed (ksps)
312
Resistive Touch Screen
No
Temp. Sensor
No
Crypto Engine
No
Sram (kbytes)
32
Self Program Memory
NO
External Bus Interface
1
Dram Memory
sdram
Nand Interface
Yes
Picopower
No
Temp. Range (deg C)
-40 to 85
I/o Supply Class
1.8/3.3
Operating Voltage (vcc)
1.65 to 1.95
Fpu
No
Mpu / Mmu
No / Yes
Timers
6
Output Compare Channels
6
Input Capture Channels
6
32khz Rtc
Yes
Calibrated Rc Oscillator
No
- SAM9260 PDF datasheet
- SAM9261 PDF datasheet #2
- SAM9XE128 PDF datasheet #3
- SAM9XE128 PDF datasheet #4
- Current page: 683 of 860
- Download datasheet (13Mb)
38.5.6
Register Name:
Address:
Access Type:
This register points to the entry in the transmit buffer queue (descriptor list) currently being used. It is written with the start
location of the transmit 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. This register can only be written when bit 3 in the
transmit status register is low.
As transmit buffer reads consist of bursts of two words, it is recommended that bit 2 is always written with zero to prevent a
burst crossing a 1K boundary, in violation of section 3.6 of the AMBA specification.
• ADDR:
Written with the address of the start of the transmit queue, reads as a pointer to the first buffer of the frame being transmit-
ted or about to be transmitted.
6254C–ATARM–22-Jan-10
31
23
15
7
Transmit buffer queue pointer address
Transmit Buffer Queue Pointer Register
30
22
14
EMAC_TBQP
0xFFFC401C
Read-write
6
29
21
13
5
ADDR
AT91SAM9XE128/256/512 Preliminary
28
20
12
4
ADDR
ADDR
ADDR
27
19
11
3
26
18
10
2
25
17
9
1
–
24
16
8
0
–
683
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