AT91RM9200-CI-002 Atmel, AT91RM9200-CI-002 Datasheet - Page 88

• Manufacturer Part Number: AT91RM9200-CI-002
• Description: IC ARM9 MCU 256 BGA
• Manufacturer: Atmel
• Series: AT91SAMr

Specifications of AT91RM9200-CI-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: 256-BGA
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Eeprom Size: -
• Data Converters: -

13.3.3
13.3.3.1
13.3.3.2
88
AT91RM9200
Bootloader Sequence
Device Initialization
Download Procedure
The Boot Program performs device initialization followed by the download procedure. If unsuc-
cessful, the upload is done via the USB or debug serial port.
Initialization follows the steps described below:
Table 13-2.
The download procedure checks for a valid boot on several devices. The first device checked is
a serial DataFlash connected to the NPCS0 of the SPI, followed by the serial EEPROM con-
nected to the TWI and by an 8-bit parallel memory connected on NCS0 of the External Bus
Interface.
3.0
4.433619
6.144
7.864320
12.0
16.0
1. PLL setup
2. Stacks setup for each ARM mode
3. Main oscillator frequency detection
4. Interrupt controller setup
5. C variables initialization
6. Branch main function
– PLLB is initialized to generate a 48 MHz clock necessary to use the USB Device. A
register located in the Power Management Controller (PMC) determines the
frequency of the main oscillator and thus the correct factor for the PLLB.
Table 13-2
Crystals Supported by Software Auto-detection (MHz)
defines the crystals supported by the Boot Program.
3.2768
4.9152
6.4
8.0
12.288
17.734470
3.6864
5.0
6.5536
9.8304
13.56
18.432
3.84
5.24288
7.159090
10.0
14.31818
20.0
1768I–ATARM–09-Jul-09
4.0
6.0
7.3728
11.05920
14.7456