AT91RM9200-QU-002 Atmel, AT91RM9200-QU-002 Datasheet - Page 92

• Manufacturer Part Number: AT91RM9200-QU-002
• Description: IC ARM9 MCU 208 PQFP
• Manufacturer: Atmel
• Series: AT91SAMr

Specifications of AT91RM9200-QU-002

• Core Processor: ARM9
• Core Size: 16/32-Bit
• Speed: 180MHz
• Connectivity: EBI/EMI, Ethernet, I²C, MMC, SPI, SSC, UART/USART, USB
• Peripherals: POR
• Number Of I /o: 122
• Program Memory Size: 128KB (128K x 8)
• Program Memory Type: ROM
• Ram Size: 48K x 8
• Voltage - Supply (vcc/vdd): 1.65 V ~ 1.95 V
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 208-MQFP, 208-PQFP
• Processor Series: AT91Rx
• Core: ARM7TDMI
• Data Bus Width: 32 bit
• Data Ram Size: 16 KB
• Interface Type: 2-Wire, EBI, I2S, SPI, UART, USART
• Maximum Clock Frequency: 180 MHz
• Number Of Programmable I/os: 122
• Number Of Timers: 10 bit
• Operating Supply Voltage: 3 V to 3.6 V
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• 3rd Party Development Tools: JTRACE-ARM-2M, MDK-ARM, RL-ARM, ULINK2
• Development Tools By Supplier: AT91SAM-ICE, AT91-ISP, AT91RM9200-EK
• Minimum Operating Temperature: - 40 C
• Eeprom Memory: 0 Bytes
• Input Output: 122
• Interface: EBI/EMI, UART/USART
• Ios: 122
• Memory Type: ROM
• Number Of Bits: 32
• Package Type: 208-pin PQFP
• Programmable Memory: 128K Bytes
• Timers: 3-16-bit
• Voltage, Range: 1.65-1.95 V
• Cpu Family: 91R
• Device Core: ARM920T
• Device Core Size: 32b
• Frequency (max): 180MHz
• Total Internal Ram Size: 16KB
• # I/os (max): 122
• Number Of Timers - General Purpose: 6
• 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: 208
• For Use With: AT91SAM-ICE - EMULATOR FOR AT91 ARM7/ARM9
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Data Converters: -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

13.4
13.4.1
13.4.1.1
13.4.1.2
92
Boot Uploader
AT91RM9200
External Communication Channels
DBGU Serial Port
Xmodem Protocol
If no valid boot device has been found during the Bootloader sequence, initialization of serial
communication devices (DBGU and USB device ports) is performed.
The boot Uploader performs the DFU and Xmodem protocols to upload the application into inter-
nal SRAM at address 0x0020_0000.
The Boot Program uses a piece of internal SRAM for variables and stacks. To prevent any
upload error, the size of the application to upload must be less than the SRAM size minus 3K
bytes.
After the download, the peripheral registers are reset, the interrupts are disabled and the remap
is performed. After the remap, the internal SRAM is at address 0x0000_0000 and the internal
ROM at address 0x0010_0000. The instruction setting the PC to 0 is the one just after the remap
command. This instruction is fetched in the pipe before doing the remap and executed just after.
This fetch cycle executes the downloaded image.
The upload is performed through the DBGU serial port initialized to 115200 Baud, 8, n, 1.
The DBGU sends the character ‘C’ (0x43) to start an Xmodem protocol. Any terminal performing
this protocol can be used to send the application file to the target. The size of the binary file to
send depends on the SRAM size embedded in the product (Refer to the microcontroller
datasheet to determine SRAM size embedded in the microcontroller). In all cases, the size of the
binary file must be lower than 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 charac-
ter 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 13-9
– Initialization of the DBGU serial port (115200 bauds, 8, N, 1) and Xmodem protocol
– Initialization of the USB Device Port and DFU protocol start
– Download of the application
– <SOH> = 01 hex
– <blk #> = binary number, starts at 01, increments by 1, and wraps 0FFH to 00H (not
– <255-blk #> = 1’s complement of the blk#.
– <checksum> = 2 bytes CRC16
start
to 01)
shows a transmission using this protocol.
1768I–ATARM–09-Jul-09