SAM7SE256 Atmel Corporation, SAM7SE256 Datasheet - Page 117
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SAM7SE256
Manufacturer Part Number
SAM7SE256
Description
Manufacturer
Atmel Corporation
Specifications of SAM7SE256
Flash (kbytes)
256 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)
32
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
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4.5.2
ARM DDI 0029G
Connecting multiple coprocessors
If you have multiple coprocessors in your system, connect the handshake signals as
follows:
nCPI
CPA and CPB
You must multiplex the output data from the coprocessors.
Connecting multiple coprocessors is shown in Figure 4-7 on page 4-14.
The logic for Figure 4-6 is as follows:
Copyright © 1994-2001. All rights reserved.
Connect this signal to all coprocessors present in the system.
The individual CPA and CPB outputs from each coprocessor must be
ANDed together, and connected to the CPA and CPB inputs on the
ARM7TDMI processor.
ARM core
Figure 4-6 Coprocessor connections with unidirectional bus
DOUT
DIN
0
1
CSEL
CPDIN
Coprocessor
ASEL
0
1
CPDOUT
0
1
CPDRIVE
Coprocessor Interface
Memory
system
4-13
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