SAM7SE32 Atmel Corporation, SAM7SE32 Datasheet - Page 14

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SAM7SE32

Manufacturer Part Number
SAM7SE32
Description
Manufacturer
Atmel Corporation
Datasheets

Specifications of SAM7SE32

Flash (kbytes)
32 Kbytes
Pin Count
144
Max. Operating Frequency
48 MHz
Cpu
ARM7TDMI
Hardware Qtouch Acquisition
No
Max I/o Pins
88
Ext Interrupts
88
Usb Transceiver
1
Usb Speed
Full Speed
Usb Interface
Device
Spi
1
Twi (i2c)
1
Uart
3
Ssc
1
Graphic Lcd
No
Video Decoder
No
Camera Interface
No
Adc Channels
8
Adc Resolution (bits)
10
Adc Speed (ksps)
384
Resistive Touch Screen
No
Temp. Sensor
No
Crypto Engine
No
Sram (kbytes)
8
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)
3.0 to 3.6
Fpu
No
Mpu / Mmu
Yes / No
Timers
3
Output Compare Channels
3
Input Capture Channels
3
Pwm Channels
4
32khz Rtc
Yes
Calibrated Rc Oscillator
No
5.4
14
Typical Powering Schematics
AT91SAM7SE512/256/32 Summary
Adequate input supply decoupling is mandatory for VDDIN in order to improve startup stability
and reduce source voltage drop. The input decoupling capacitor should be placed close to the
chip. For example, two capacitors can be used in parallel: 100 nF NPO and 4.7 µF X7R.
The AT91SAM7SE512/256/32 supports a 3.3V single supply mode. The internal regulator input
connected to the 3.3V source and its output feeds VDDCORE and the VDDPLL.
shows the power schematics to be used for USB bus-powered systems.
Figure 5-1.
• One external 470 pF (or 1 nF) NPO capacitor should be connected between VDDOUT and
• One external 2.2 µF (or 3.3 µF) X7R capacitor should be connected between VDDOUT and
GND as close to the chip as possible.
GND.
3.3V System Single Power Supply Schematic
from 4.5V (USB)
Power Source
ranges
to 18V
DC/DC Converter
3.3V
VDDFLASH
VDDIO
VDDIN
VDDOUT
VDDCORE
VDDPLL
Regulator
Voltage
6222ES–ATARM–15-Dec-09
Figure 5-1

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