AT91SAM7X128 Atmel, AT91SAM7X128 Datasheet - Page 483

• Manufacturer Part Number: AT91SAM7X128
• Description: MCU 32-Bit 91S ARM7TDMI RISC 128KB Flash 1.8V/3.3V 100-Pin LQFP
• Manufacturer: Atmel

Specifications of AT91SAM7X128

• Package: 100LQFP
• Device Core: ARM7TDMI
• Family Name: 91S
• Maximum Speed: 55 MHz
• Ram Size: 32 KB
• Program Memory Size: 128 KB
• Operating Supply Voltage: 1.8|3.3 V
• Data Bus Width: 32 Bit
• Program Memory Type: Flash
• Number Of Programmable I/os: 62
• Interface Type: CAN/Ethernet/SPI/I2S/TWI/USART/USB
• On-chip Adc: 8-chx10-bit
• Operating Temperature: -40 to 85 °C
• Number Of Timers: 3

34.6.11
Register Name:
Access Type:
• FIFO_DATA[7:0]: FIFO Data Value
The microcontroller can push or pop values in the FIFO through this register.
RXBYTECNT in the corresponding UDP_ CSRx register is the number of bytes to be read from the FIFO (sent by the host).
The maximum number of bytes to write is fixed by the Max Packet Size in the Standard Endpoint Descriptor. It can not be
more than the physical memory size associated to the endpoint. Refer to the Universal Serial Bus Specification, Rev. 2.0
for more information.
6120H–ATARM–17-Feb-09
31
23
15
–
–
–
7
UDP FIFO Data Register
30
22
14
UDP_ FDRx [x = 0..5]
Read-write
–
–
–
6
29
21
13
–
–
–
5
AT91SAM7X512/256/128 Preliminary
28
20
12
–
–
–
4
FIFO_DATA
27
19
11
–
–
–
3
26
18
10
–
–
–
2
25
17
–
–
9
–
1
24
16
–
–
8
–
0
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