AT91SAM9261SB-CU-999 Atmel, AT91SAM9261SB-CU-999 Datasheet - Page 668

• Manufacturer Part Number: AT91SAM9261SB-CU-999
• Description: IC MCU ARM9 ULTRA LP 217LFBGA
• Manufacturer: Atmel
• Series: AT91SAMr

Specifications of AT91SAM9261SB-CU-999

• Core Processor: ARM9
• Core Size: 16/32-Bit
• Speed: 190MHz
• Connectivity: EBI/EMI, I²C, MMC, SPI, SSC, UART/USART, USB
• Peripherals: DMA, LCD, POR, PWM, WDT
• Number Of I /o: 96
• Program Memory Size: 32KB (32K x 8)
• Program Memory Type: ROM
• Ram Size: 48K x 8
• Voltage - Supply (vcc/vdd): 1.08 V ~ 1.32 V
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 217-LFBGA
• Processor Series: AT91SAMx
• Core: ARM926EJ-S
• Data Bus Width: 32 bit
• Data Ram Size: 16 KB
• Interface Type: 2-Wire, I2S, SPI, USB
• Maximum Clock Frequency: 190 MHz
• Number Of Programmable I/os: 96
• Number Of Timers: 4
• 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, AT91SAM9261-EK
• Minimum Operating Temperature: - 40 C
• For Use With: AT91SAM9261-EK - KIT EVAL FOR AT91SAM926EJ-SAT91SAM-ICE - EMULATOR FOR AT91 ARM7/ARM9
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Data Converters: -
• Lead Free Status / Rohs Status: Details

42.2
42.2.1
42.2.1.1
42.2.2
42.2.2.1
668
AT91SAM9261S Errata - Revision A Parts
AT91SAM9261S
Main Oscillator
Battery Backup
Main Oscillator: Spurious Malfunction of Main Oscillator
Backup Overconsumption During AHB Masters Activity
Refer to
The main oscillator can exhibit spurious malfunction as exhibited by the duty-cycle not perform-
ing according to specification, missing main clock periods, or in the worst case, no main clock at
all. The behavior does not alter over time. A device fully tested over the operating range (includ-
ing power supply and temperature) in an application without exhibiting any malfunction will
continue to function according to specifications.
Placing a series resistor of 470 Ω between XOUT and the crystal will fix the issue.
The additional series resistor will not alter the device specification as documented in the
datasheet, including the startup time and power consumption.
Conditions:
During AHB Masters activity (LCD DMA, USB Host DMA, etc.) the backup current can rise up to
12 µA @ 25⋅ C.
Figure 42-1 on page 668
when the main power supply is off. In active mode, the clocks of unused peripherals should be
disabled through the Power Management Controller to save power.
Figure 42-1. Schematic
Problem Fix/Workaround
Problem Fix/Workaround
Section 42.1 “Marking” on page
J1
CR1225
Z1
+
3V
shows how to feed the backup part of the chip from the battery only
MMBD1704A
R1
CR1
1K
667.
3V3
3
C1
100NF
MN1
R1100D121C
C2
100NF
VDDBU
6242E–ATARM–11-Sep09