SAM7XC256 Atmel Corporation, SAM7XC256 Datasheet - Page 179
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SAM7XC256
Manufacturer Part Number
SAM7XC256
Description
Manufacturer
Atmel Corporation
Specifications of SAM7XC256
Flash (kbytes)
256 Kbytes
Pin Count
100
Max. Operating Frequency
55 MHz
Cpu
ARM7TDMI
Hardware Qtouch Acquisition
No
Max I/o Pins
62
Ext Interrupts
62
Usb Transceiver
1
Usb Speed
Full Speed
Usb Interface
Device
Spi
2
Twi (i2c)
1
Uart
3
Can
1
Ssc
1
Ethernet
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
Dac Resolution (bits)
No
Temp. Sensor
No
Crypto Engine
AES/DES
Sram (kbytes)
64
Self Program Memory
NO
Dram Memory
No
Nand Interface
No
Picopower
No
Temp. Range (deg C)
-40 to 85
I/o Supply Class
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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7.4
ARM DDI 0029G
Bidirectional data write cycle
Figure 7-3 shows the ARM7TDMI processor bidirectional data write cycle timing. The
timing parameters used in Figure 7-3 are listed in Table 7-3.
In Figure 7-3 DBE is HIGH and nENIN is LOW during the cycle shown.
nENOUT
D[31:0]
MCLK
Note
Copyright © 1994-2001. All rights reserved.
T
nen
Symbol
T
T
T
T
doh
dout
nen
nenh
Table 7-3 Bidirectional data write cycle timing parameters
T
dout
Parameter
DOUT[31:0] hold from MCLKf
MCLKf to D[31:0] valid
MCLKf to nENOUT valid
nENOUT hold time from MCLKf
Figure 7-3 Bidirectional data write cycle timing
T
T
nenh
doh
AC and DC Parameters
Parameter type
Minimum
Minimum
Maximum
Maximum
7-7
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