SAM9263 Atmel Corporation, SAM9263 Datasheet - Page 218

• Manufacturer Part Number: SAM9263
• Manufacturer: Atmel Corporation

Specifications of SAM9263

• Flash (kbytes): 0 Kbytes
• Pin Count: 324
• Max. Operating Frequency: 240 MHz
• Cpu: ARM926
• Hardware Qtouch Acquisition: No
• Max I/o Pins: 160
• Ext Interrupts: 160
• Usb Transceiver: 3
• Usb Speed: Full Speed
• Usb Interface: Host, Device
• Spi: 2
• Twi (i2c): 1
• Uart: 4
• Can: 1
• Ssc: 2
• Ethernet: 1
• Sd / Emmc: 2
• Graphic Lcd: Yes
• Video Decoder: No
• Camera Interface: Yes
• Resistive Touch Screen: No
• Temp. Sensor: No
• Crypto Engine: No
• Sram (kbytes): 96
• Self Program Memory: NO
• External Bus Interface: 2
• Dram Memory: sdram
• Nand Interface: Yes
• Picopower: No
• Temp. Range (deg C): -40 to 85
• I/o Supply Class: 1.8/3.3
• Fpu: No
• Mpu / Mmu: No / Yes
• Timers: 3
• Output Compare Channels: 3
• Input Capture Channels: 3
• Pwm Channels: 4
• 32khz Rtc: Yes
• Calibrated Rc Oscillator: No

22.7
22.7.1
22.7.2
194
Connection to External Devices
AT91SAM9263
Data Bus Width
Byte Write or Byte Select Access
A data bus width of 8, 16, or 32 bits can be selected for each chip select. This option is con-
trolled by the field DBW in SMC_MODE (Mode Register) for the corresponding chip select.
Figure 22-3
connect a 512K x 16-bit memory on NCS2.
as a single 32-bit memory
Each chip select with a 16-bit or 32-bit data bus can operate with one of two different types of
write access: byte write or byte select access. This is controlled by the BAT field of the
SMC_MODE register for the corresponding chip select.
Figure 22-3.
Figure 22-4.
shows how to connect a 512K x 8-bit memory on NCS2.
Memory Connection for an 8-bit Data Bus
Memory Connection for a 16-bit Data Bus
SMC
SMC
D[15:0]
NCS[2]
A[19:2]
NBS0
NBS1
NWE
NCS[2]
A[18:2]
NRD
D[7:0]
NWE
A1
NRD
A0
A1
Figure 22-5
shows two 16-bit memories connected
D[7:0]
A[18:2]
Write Enable
Output Enable
Memory Enable
D[15:0]
A[18:1]
A[0]
Low Byte Enable
High Byte Enable
Write Enable
Output Enable
Memory Enable
A0
A1
Figure 22-4
6249I–ATARM–3-Oct-11
shows how to