AT91SAM7S321-AU Atmel, AT91SAM7S321-AU Datasheet - Page 169
AT91SAM7S321-AU
Manufacturer Part Number
AT91SAM7S321-AU
Description
IC ARM7 MCU FLASH 32K 64LQFP
Manufacturer
Atmel
Series
AT91SAMr
Datasheets
1.AT91SAM7S16-MU.pdf
(51 pages)
2.AT91SAM7S16-MU.pdf
(779 pages)
3.AT91SAM7S321-AU.pdf
(600 pages)
Specifications of AT91SAM7S321-AU
Core Processor
ARM7
Core Size
16/32-Bit
Speed
55MHz
Connectivity
I²C, SPI, SSC, UART/USART, USB
Peripherals
Brown-out Detect/Reset, DMA, POR, PWM, WDT
Number Of I /o
32
Program Memory Size
32KB (32K x 8)
Program Memory Type
FLASH
Ram Size
8K 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
64-LQFP
Processor Series
AT91SAMx
Core
ARM7TDMI
Data Bus Width
32 bit
Data Ram Size
8 KB
Interface Type
I2C, I2S, SPI, SSC, TWI, UART, USB
Maximum Clock Frequency
55 MHz
Number Of Programmable I/os
32
Number Of Timers
10 bit
Operating Supply Voltage
1.8 V to 3.3 V
Maximum Operating Temperature
+ 85 C
Mounting Style
SMD/SMT
3rd Party Development Tools
JTRACE-ARM-2M, KSK-AT91SAM7S-PL, MDK-ARM, RL-ARM, ULINK2
Development Tools By Supplier
AT91SAM-ICE, AT91-ISP, AT91SAM7S-EK
Minimum Operating Temperature
- 40 C
On-chip Adc
10 bit, 8 Channel
Controller Family/series
AT91SAM7xxxx
No. Of I/o's
32
Ram Memory Size
8KB
Cpu Speed
55MHz
No. Of Timers
3
Rohs Compliant
Yes
For Use With
AT91SAM-ICE - EMULATOR FOR AT91 ARM7/ARM9AT91SAM7S-EK - KIT EVAL FOR ARM AT91SAM7S
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Eeprom Size
-
Lead Free Status / Rohs Status
Lead free / RoHS Compliant
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
- Current page: 169 of 600
- Download datasheet (7Mb)
22.5.2
22.5.3
6175G–ATARM–22-Nov-06
Xmodem Protocol
USB Device Port
the binary file to send depends on the SRAM size embedded in the product. In all cases, the
size of the binary file must be lower than the SRAM size because the Xmodem protocol
requires some SRAM memory to work.
The Xmodem protocol supported is the 128-byte length block. This protocol uses a two-char-
acter CRC-16 to guarantee detection of a maximum bit error.
Xmodem protocol with CRC is accurate provided both sender and receiver report successful
transmission. Each block of the transfer looks like:
<SOH><blk #><255-blk #><--128 data bytes--><checksum> in which:
Figure 22-4
Figure 22-4. Xmodem Transfer Example
A 48 MHz USB clock is necessary to use the USB Device port. It has been programmed ear-
lier in the device initialization procedure with PLLB configuration.
The device uses the USB communication device class (CDC) drivers to take advantage of the
installed PC RS-232 software to talk over the USB. The CDC class is implemented in all
releases of Windows
www.usb.org, describes a way to implement devices such as ISDN modems and virtual COM
ports.
– <SOH> = 01 hex
– <blk #> = binary number, starts at 01, increments by 1, and wraps 0FFH to 00H
– <255-blk #> = 1’s complement of the blk#.
– <checksum> = 2 bytes CRC16
(not to 01)
shows a transmission using this protocol.
®
, from Windows98SE to WindowsXP. The CDC document, available at
Host
AT91SAM7S Series Preliminary
SOH 02 FD Data[128] CRC CRC
SOH 03 FC Data[100] CRC CRC
SOH 01 FE Data[128] CRC CRC
ACK
EOT
ACK
ACK
ACK
C
Device
169
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