SAM9261 Atmel Corporation, SAM9261 Datasheet - Page 677

• Manufacturer Part Number: SAM9261
• Manufacturer: Atmel Corporation

Specifications of SAM9261

• Flash (kbytes): 0 Kbytes
• Pin Count: 217
• Max. Operating Frequency: 240 MHz
• Cpu: ARM926
• Hardware Qtouch Acquisition: No
• Max I/o Pins: 96
• Ext Interrupts: 96
• Usb Transceiver: 3
• Usb Speed: Full Speed
• Usb Interface: Host, Device
• Spi: 2
• Twi (i2c): 1
• Uart: 4
• Ssc: 3
• Sd / Emmc: 1
• Graphic Lcd: Yes
• Video Decoder: No
• Camera Interface: No
• Resistive Touch Screen: No
• Temp. Sensor: No
• Crypto Engine: No
• Sram (kbytes): 160
• Self Program Memory: NO
• External Bus Interface: 1
• Dram Memory: sdram
• Nand Interface: Yes
• Picopower: No
• Temp. Range (deg C): -40 to 85
• I/o Supply Class: 1.8/3.3
• Operating Voltage (vcc): 1.08 to 1.32
• Fpu: No
• Mpu / Mmu: No/Yes
• Timers: 3
• Output Compare Channels: 3
• Input Capture Channels: 3
• 32khz Rtc: Yes
• Calibrated Rc Oscillator: No

39.7
Table 39-16. Power-On-Reset Characteristics
39.7.1
39.7.2
6062N–ATARM–3-Oct-11
Symbol
V
V
T
th+
th-
RES
Core Power Supply POR CHaracteristics
Power Sequence Requirements
Power-Up Sequence
Parameter
Threshold Voltage Rising
Threshold Voltage Falling
Reset Time
The AT91SAM9261 board design must comply with the power-up guidelines below to guarantee
reliable operation of the device. Any deviation from these sequences may prevent the device
from booting.
Figure 39-3.
VDDCORE and VDDBU are controlled by internal POR (Power-On-Reset) to guarantee that
these power sources reach their target values prior to the release of POR.
• VDDIOP must be ≥ to V
• VDDIOM must reach V
+ T1) after VDDCORE has reached
+T2) after VDDCORE has reached
– T
– T1 = 3 x T
– T2 = 16 x T
RES
VDDCOREtyp
Core Supply POR Output
is a POR characteristic
VDDIOtyp
VDD (V)
VDDCORE and VDDIO Constraints at Startup
SLCK
Vth+
Voh
Vih
SLCK
SLCK
Conditions
Minimum Slope of +2.0V/30ms
OH
IH
(refer to DC characteristics
(refer to DC characteristics table for more details) within (Tres +T1
V
V
th+
th+
.
<--- Tres --->
< T1 >
<------------ T2----------->
Min
Table 39-2
0.7
0.6
50
Typ
170
0.9
0.8
for more details) within (Tres
AT91SAM9261
VDDIO > Vih
VDDIO > Voh
VDDCORE
Max
1.08
300
1.0
VDDIO
t
Units
µs
V
V
677