SAM7SE256 Atmel Corporation, SAM7SE256 Datasheet - Page 167

• 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

22.6.2.4
6222F–ATARM–14-Jan-11
Write Data Hold Time
Figure 22-8
on NCS2 (BAT = 1).
Figure 22-8. Connection to a 16-bit Data Path Device without Byte Write Capability
During write cycles, data output becomes valid after the rising edge of MCK and remains valid
after the rising edge of NWE. During a write access, the data remain on the bus 1/2 period of
MCK after the rising edge of NWE. See
Figure 22-9. Write Access with 0 Wait State
D[15:0]
A[22:0]
NWE
MCK
NCS
shows how to connect a 16-bit device without byte access (e.g., Flash device type)
SMC
D[15:8]
A[19:1]
D[7:0]
NCS2
NWE
NRD
NUB
NLB
Figure 22-9
and
Figure
SAM7SE512/256/32
D[7:0]
D[15:8]
A[18:0]
Write Enable
Output Enable
Memory Enable
22-10.
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