AT91SAM9XE512-QU Atmel, AT91SAM9XE512-QU Datasheet - Page 672
![MCU ARM9 512K FLASH 208-PQFP](/photos/6/73/67311/313-208-pqfp_sml.jpg)
AT91SAM9XE512-QU
Manufacturer Part Number
AT91SAM9XE512-QU
Description
MCU ARM9 512K FLASH 208-PQFP
Manufacturer
Atmel
Series
AT91SAMr
Datasheet
1.AT91SAM9XE128-QU.pdf
(860 pages)
Specifications of AT91SAM9XE512-QU
Core Processor
ARM9
Core Size
16/32-Bit
Speed
180MHz
Connectivity
EBI/EMI, Ethernet, I²C, MMC, SPI, SSC, UART/USART, USB
Peripherals
Brown-out Detect/Reset, POR, PWM, WDT
Number Of I /o
96
Program Memory Size
512KB (512K x 8)
Program Memory Type
FLASH
Ram Size
56K x 8
Voltage - Supply (vcc/vdd)
1.65 V ~ 1.95 V
Data Converters
A/D 4x10b
Oscillator Type
Internal
Operating Temperature
-40°C ~ 85°C
Package / Case
208-MQFP, 208-PQFP
Controller Family/series
AT91SAM9xxxxx
No. Of I/o's
96
Ram Memory Size
32KB
Cpu Speed
180MHz
No. Of Timers
2
Rohs Compliant
Yes
Data Bus Width
32 bit
Data Ram Size
32 KB
Interface Type
2-Wire, EBI, I2S, SPI, USART
Maximum Clock Frequency
180 MHz
Number Of Programmable I/os
96
Number Of Timers
6
Maximum Operating Temperature
+ 85 C
Mounting Style
SMD/SMT
Minimum Operating Temperature
- 40 C
On-chip Adc
10 bit, 4 Channel
Package
208PQFP
Device Core
ARM926EJ-S
Family Name
91S
Maximum Speed
180 MHz
Operating Supply Voltage
1.8|2.5|3.3 V
For Use With
AT91SAM9XE-EK - KIT EVAL FOR AT91SAM9XEAT91SAM-ICE - EMULATOR FOR AT91 ARM7/ARM9
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Eeprom Size
-
Lead Free Status / Rohs Status
Details
Available stocks
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Quantity
Price
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38.4.1.3
38.4.1.4
38.4.1.5
38.4.1.6
672
AT91SAM9XE128/256/512 Preliminary
Transmit Buffer List
Address Matching
Interrupts
Transmitting Frames
Transmit data is read from areas of data (the buffers) in system memory These buffers are listed
in another data structure that also resides in main memory. This data structure (Transmit Buffer
Queue) is a sequence of descriptor entries (as defined in
this data structure.
To create this list of buffers:
The EMAC register-pair hash address and the four specific address register-pairs must be writ-
ten with the required values. Each register-pair comprises a bottom register and top register,
with the bottom register being written first. The address matching is disabled for a particular reg-
ister-pair after the bottom-register has been written and re-enabled when the top register is
written.
ister-pair may be written at any time, regardless of whether the receive circuits are enabled or
disabled.
There are
single interrupt. Depending on the overall system design, this may be passed through a further
level of interrupt collection (interrupt controller). On receipt of the interrupt signal, the CPU
enters the interrupt handler (Refer to the AIC programmer datasheet). To ascertain which inter-
rupt has been generated, read the interrupt status register. Note that this register clears itself
when read. At reset, all interrupts are disabled. To enable an interrupt, write to interrupt enable
register with the pertinent interrupt bit set to 1. To disable an interrupt, write to interrupt disable
register with the pertinent interrupt bit set to 1. To check whether an interrupt is enabled or dis-
abled, read interrupt mask register: if the bit is set to 1, the interrupt is disabled.
To set up a frame for transmission:
1. Allocate a number (n) of buffers of between 1 and 2047 bytes of data to be transmitted
2. Allocate an area 2n words for the transmit buffer descriptor entry in system memory
3. If fewer than 1024 buffers are defined, the last descriptor must be marked with the wrap
4. Write address of transmit buffer descriptor entry to EMAC register transmit_buffer
5. The transmit circuits can then be enabled by writing to the network control register.
1. Enable transmit in the network control register.
2. Allocate an area of system memory for transmit data. This does not have to be contigu-
3. Set-up the transmit buffer list.
4. Set the network control register to enable transmission and enable interrupts.
5. Write data for transmission into these buffers.
6. Write the address to transmit buffer descriptor queue pointer.
7. Write control and length to word one of the transmit buffer descriptor entry.
in system memory. Up to 128 buffers per frame are allowed.
and create N entries in this list. Mark all entries in this list as owned by EMAC, i.e. bit 31
of word 1 set to 0.
bit — bit 30 in word 1 set to 1.
queue pointer.
ous, varying byte lengths can be used as long as they conclude on byte borders.
See “Address Checking Block” on page 667.
14
interrupt conditions that are detected within the EMAC. These are ORed to make a
for details of address matching. Each reg-
Table 38-2 on page
6254C–ATARM–22-Jan-10
664) that points to
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