AT91SAM9XE128-QU Atmel, AT91SAM9XE128-QU Datasheet - Page 76

• Manufacturer Part Number: AT91SAM9XE128-QU
• Description: MCU ARM9 128K FLASH 208-PQFP
• Manufacturer: Atmel
• Series: AT91SAMr

Specifications of AT91SAM9XE128-QU

• Core Processor: ARM9
• Core Size: 16/32-Bit
• Speed: 180MHz
• Connectivity: EBI/EMI, Ethernet, I²C, MMC, SPI, SSC, UART/USART, USB
• Peripherals: Brown-out Detect/Reset, POR, PWM, WDT
• Number Of I /o: 96
• Program Memory Size: 128KB (128K x 8)
• Program Memory Type: FLASH
• Ram Size: 40K x 8
• Voltage - Supply (vcc/vdd): 1.65 V ~ 1.95 V
• Data Converters: A/D 4x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 208-MQFP, 208-PQFP
• Processor Series: AT91SAMx
• Core: ARM926EJ-S
• Data Bus Width: 32 bit
• Data Ram Size: 16 KB
• Interface Type: 2-Wire, EBI, I2S, SPI, USART
• Maximum Clock Frequency: 180 MHz
• Number Of Programmable I/os: 96
• Number Of Timers: 6
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• 3rd Party Development Tools: JTRACE-ARM-2M, KSK-AT91SAM9XE-PL, MDK-ARM, RL-ARM, ULINK2
• Development Tools By Supplier: AT91SAM-ICE, AT91-ISP, AT91SAM9XE-EK
• Minimum Operating Temperature: - 40 C
• On-chip Adc: 10 bit, 4 Channel
• For Use With: AT91SAM9XE-EK - KIT EVAL FOR AT91SAM9XEAT91SAM-ICE - EMULATOR FOR AT91 ARM7/ARM9
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

13.3
76
Device Initialization
AT91SAM9XE128/256/512 Preliminary
Initialization follows the steps described below:
Table 13-1.
Note:
Table 13-2.
Note:
Table 13-3.
Note:
Boot on DBGU
Boot on USB
Boot on DBGU
Boot on USB
3.0
4.433619
6.144
7.864320
12.0
16.0
1. FIQ Initialization
2. Stack setup for ARM supervisor mode
3. External Clock Detection
4. Switch Master Clock on Main Oscillator
5. C variable initialization
6. Main oscillator frequency detection if no external clock detected
7. PLL setup: 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.
a. If Internal RC Oscillator is used (OSCSEL = 0) and Main Oscillator is active,
b. If Internal RC Oscillator is used (OSCSEL = 0) and Main Oscillator is bypassed,
c. If an external 32768 Hz Oscillator is used (OSCSEL = 1) (OSCSEL = 1 and bypass
Any other crystal can be used but it prevents using the USB.
Any other input frequency can be used but it prevents using the USB.
Booting on USB or on DBGU is possible with any of these crystals.
13-1
RC oscillator.
Table 13-2
ing main oscillator.
mode),
Reduced Crystal Table (MHz) OSCSEL = 0
Input Frequencies Supported by Software Auto-detection (MHz) OSCSEL = 0
Large Crystal Table (MHz) OSCSEL = 1
defines the crystals supported by the Boot Program when using the internal
Table 13-3
3.0
Yes
Yes
3.2768
16.367667
4.9152
6.4
8.0
12.288
defines the frequencies supported by the Boot Program when bypass-
1.0
Yes
Yes
defines the crystals supported by the Boot Program.
2.0
Yes
Yes
3.6864
6.0
Yes
Yes
5.0
6.5536
9.8304
13.56
17.734470
6.0
Yes
Yes
12.0
Yes
Yes
3.84
18.432
Yes
Yes
5.24288
7.159090
10.0
14.31818
18.432
25.0
Yes
Yes
6254C–ATARM–22-Jan-10
50.0
Yes
Yes
4.0
6.0
Other
Yes
No
7.3728
11.05920
14.7456
20.0
Table
Other
Yes
No