SAM7X256 Atmel Corporation, SAM7X256 Datasheet - Page 180

• Manufacturer Part Number: SAM7X256
• Manufacturer: Atmel Corporation

Specifications of SAM7X256

• 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
• Temp. Sensor: No
• Crypto Engine: No
• 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

AC and DC Parameters
7.5
7-8
Bidirectional data read cycle
Figure 7-4 shows the ARM7TDMI processor bidirectional data read cycle timing. The
timing parameters used in Figure 7-4 are listed in Table 7-4.
In Figure 7-4, DBE is HIGH and nENIN is LOW during the cycle shown.
nENOUT
D[31:0]
BL[3:0]
MCLK
Note
Copyright © 1994-2001. All rights reserved.
T
T
nen
bylh
Symbol
T
T
T
T
T
bylh
byls
dih
dis
nen
Table 7-4 Bidirectional data read cycle timing parameters
T
byls
Parameter
BL[3:0] hold time from MCLKf
BL[3:0] set up to from MCLKr
DIN[31:0] hold time from MCLKf
DIN[31:0] setup time to MCLKf
MCLKf to nENOUT valid
Figure 7-4 Bidirectional data read cycle timing
T
dis
T
dih
Minimum
Minimum
Minimum
Minimum
Maximum
Parameter type
ARM DDI 0029G