SAM7SE256 Atmel Corporation, SAM7SE256 Datasheet - Page 183

• Manufacturer Part Number: SAM7SE256
• 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

22.6.7.2
Figure 22-32. Read Accesses in Standard Read Protocol with Setup and Hold
Note:
Figure 22-33. Write Accesses with Setup and Hold
Note:
6222F–ATARM–14-Jan-11
NWR0/NWE
NWR0/NWE
NWR1/NUB
NWR1/NUB
1. Read access, memory data bus width = 8, RWSETUP = 1, RWHOLD = 1,WSEN= 1, NWS = 0
1. Write access, memory data bus width = 8, RWSETUP = 1, RWHOLD = 1, WSEN = 1, NWS = 0
A0/NLB
A0/NLB
D[15:0]
A[22:1]
A[22:1]
D[15:0]
MCK
NRD
NCS
MCK
NRD
NCS
Accesses with Setup and Hold
3000
00d2b
008cb
e59f
e3a0
Figure 22-32
Hold Cycles.
Setup
Setup
and
Figure 22-33
0001
0605
(1)
Hold
show an example of read and write accesses with Setup and
Hold
00028
00082
Setup
Setup
(1)
SAM7SE512/256/32
0606
Hold
0002
Hold
008cc
00d2c
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