SAM7S321 Atmel Corporation, SAM7S321 Datasheet - Page 92
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SAM7S321
Manufacturer Part Number
SAM7S321
Description
Manufacturer
Atmel Corporation
Specifications of SAM7S321
Flash (kbytes)
32 Kbytes
Pin Count
64
Max. Operating Frequency
55 MHz
Cpu
ARM7TDMI
Hardware Qtouch Acquisition
No
Max I/o Pins
32
Ext Interrupts
32
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
Dram Memory
No
Nand Interface
No
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
no / no
Timers
3
Output Compare Channels
3
Input Capture Channels
3
Pwm Channels
4
32khz Rtc
Yes
Calibrated Rc Oscillator
No
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Memory Interface
3-22
ARM7TDMI core test chip example system
Connecting the ARM7TDMI processor data bus, D[31:0] to an external shared bus
requires additional logic that varies between applications in the case of a test chip.
In this application, care must be taken to prevent bus clash on D[31:0] when the data
bus drive changes direction. The timing of nENIN, and the pad control signals must be
arranged so that when the core starts to drive out, the pad drive onto D[31:0] is disabled
before the core starts to drive. Similarly, when the bus switches back to input, the core
must stop driving before the pad is enabled.
The circuit implemented in the ARM7TDMI processor test chip is shown in Figure 3-17
on page 3-23.
Copyright © 1994-2001. All rights reserved.
ARM DDI 0029G
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