AT91SAM7X256B-AU Atmel, AT91SAM7X256B-AU Datasheet - Page 455
![IC MCU 256KB FLASH 100LQFP](/photos/6/76/67646/313-100-lqfp_sml.jpg)
AT91SAM7X256B-AU
Manufacturer Part Number
AT91SAM7X256B-AU
Description
IC MCU 256KB FLASH 100LQFP
Manufacturer
Atmel
Series
AT91SAMr
Specifications of AT91SAM7X256B-AU
Core Processor
ARM7
Core Size
16/32-Bit
Speed
55MHz
Connectivity
CAN, Ethernet, I²C, SPI, SSC, UART/USART, USB
Peripherals
Brown-out Detect/Reset, DMA, POR, PWM, WDT
Number Of I /o
62
Program Memory Size
256KB (256K x 8)
Program Memory Type
FLASH
Ram Size
64K x 8
Voltage - Supply (vcc/vdd)
1.65 V ~ 1.95 V
Data Converters
A/D 8x10b
Oscillator Type
Internal
Operating Temperature
-40°C ~ 85°C
Package / Case
100-LQFP
Package
100LQFP
Device Core
ARM7TDMI
Family Name
91S
Maximum Speed
55 MHz
Operating Supply Voltage
1.8|3.3 V
Data Bus Width
32 Bit
Number Of Programmable I/os
62
Interface Type
CAN/Ethernet/SPI/I2S/TWI/USART/USB
On-chip Adc
8-chx10-bit
Number Of Timers
3
Controller Family/series
AT91SAM7xxxxx
No. Of I/o's
62
Ram Memory Size
64KB
Cpu Speed
55MHz
No. Of Timers
1
Rohs Compliant
Yes
Cpu Family
91S
Device Core Size
32b
Frequency (max)
55MHz
Total Internal Ram Size
64KB
# I/os (max)
62
Number Of Timers - General Purpose
3
Operating Supply Voltage (typ)
1.8/3.3V
Operating Supply Voltage (max)
1.95/3.6V
Operating Supply Voltage (min)
1.65/3V
Instruction Set Architecture
RISC
Operating Temp Range
-40C to 85C
Operating Temperature Classification
Industrial
Mounting
Surface Mount
Pin Count
100
Package Type
LQFP
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Eeprom Size
-
Lead Free Status / Rohs Status
Compliant
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
AT91SAM7X256B-AU
Manufacturer:
Atmel
Quantity:
1 800
Part Number:
AT91SAM7X256B-AU
Manufacturer:
ATMEL/爱特梅尔
Quantity:
20 000
- Current page: 455 of 687
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Figure 34-5. Setup Transaction Followed by a Data OUT Transaction
34.5.2.2
6120H–ATARM–17-Feb-09
Using Endpoints Without Ping-pong Attributes
USB
Bus Packets
RXSETUP Flag
RX_Data_BKO
(UDP_CSRx)
FIFO (DPR)
Content
Data IN Transaction
Setup
PID
Setup Received
Data IN transactions are used in control, isochronous, bulk and interrupt transfers and conduct
the transfer of data from the device to the host. Data IN transactions in isochronous transfer
must be done using endpoints with ping-pong attributes.
To perform a Data IN transaction using a non ping-pong endpoint:
After the last packet has been sent, the application must clear TXCOMP once this has been set.
TXCOMP is set by the USB device when it has received an ACK PID signal for the Data IN
packet. An interrupt is pending while TXCOMP is set.
Warning: TX_COMP must be cleared after TX_PKTRDY has been set.
Note:
XX
1. The application checks if it is possible to write in the FIFO by polling TXPKTRDY in the
2. The application writes the first packet of data to be sent in the endpoint’s FIFO, writing
3. The application notifies the USB peripheral it has finished by setting the TXPKTRDY in
4. The application is notified that the endpoint’s FIFO has been released by the USB
5. The microcontroller writes the second packet of data to be sent in the endpoint’s FIFO,
6. The microcontroller notifies the USB peripheral it has finished by setting the TXPK-
7. The application clears the TXCOMP in the endpoint’s UDP_ CSRx.
Data Setup
endpoint’s UDP_ CSRx register (TXPKTRDY must be cleared).
zero or more byte values in the endpoint’s UDP_ FDRx register,
the endpoint’s UDP_ CSRx register.
device when TXCOMP in the endpoint’s UDP_ CSRx register has been set. Then an
interrupt for the corresponding endpoint is pending while TXCOMP is set.
writing zero or more byte values in the endpoint’s UDP_ FDRx register,
TRDY in the endpoint’s UDP_ CSRx register.
Refer to Chapter 8 of the Universal Serial Bus Specification, Rev 2.0, for more information on the
Data IN protocol layer.
Set by USB Device
ACK
PID
Setup Handled by Firmware
AT91SAM7X512/256/128 Preliminary
Data OUT
PID
Interrupt Pending
Data Setup
Data OUT
Cleared by Firmware
NAK
PID
Data OUT
PID
Data Out Received
Set by USB
Device Peripheral
XX
Data OUT
ACK
PID
Data
OUT
455
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