R40008 Atmel Corporation, R40008 Datasheet - Page 23

• Manufacturer Part Number: R40008
• Manufacturer: Atmel Corporation

Specifications of R40008

• Flash (kbytes): 0 Kbytes
• Pin Count: 100
• Max. Operating Frequency: 75 MHz
• Cpu: ARM7TDMI
• Hardware Qtouch Acquisition: No
• Max I/o Pins: 32
• Ext Interrupts: 32
• Usb Speed: No
• Usb Interface: No
• Uart: 2
• Graphic Lcd: No
• Video Decoder: No
• Camera Interface: No
• Resistive Touch Screen: No
• Temp. Sensor: No
• Crypto Engine: No
• Sram (kbytes): 256
• Self Program Memory: NO
• External Bus Interface: 1
• Dram Memory: No
• Nand Interface: No
• Picopower: No
• Temp. Range (deg C): -40 to 85
• I/o Supply Class: 3.3
• Fpu: No
• Mpu / Mmu: no / no
• Timers: 3
• Output Compare Channels: 3
• Input Capture Channels: 3
• 32khz Rtc: No
• Calibrated Rc Oscillator: No

Data Bus Width
1354D–ATARM–08/02
A data bus width of 8 or 16 bits can be selected for each chip select. This option is con-
trolled by the DBW field in the EBI_CSR (Chip Select Register) for the corresponding
chip select.
Figure 9 shows how to connect a 512K x 8-bit memory on NCS2.
Figure 9. Memory Connection for an 8-bit Data Bus
Figure 10 shows how to connect a 512K x 16-bit memory on NCS2.
Figure 10. Memory Connection for a 16-bit Data Bus
EBI
EBI
D8 - D15
A1 - A19
D0 - D7
D8 - D15
A1 - A18
D0 - D7
NCS2
NWE
NWR1
NWR0
NUB
NOE
NLB
NCS2
NRD
A0
D0 - D7
D8 - D15
A0 - A18
Low Byte Enable
High Byte Enable
Write Enable
Output Enable
Memory Enable
AT91X40 Series
D0 - D7
A1 - A18
A0
Write Enable
Output Enable
Memory Enable
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