AT91R40807-33AI Atmel, AT91R40807-33AI Datasheet - Page 23

• Manufacturer Part Number: AT91R40807-33AI
• Description: IC ARM7 MCU 176 TQFP
• Manufacturer: Atmel
• Series: AT91SAMr

Specifications of AT91R40807-33AI

• Core Processor: ARM7
• Core Size: 16/32-Bit
• Speed: 33MHz
• Connectivity: EBI/EMI, UART/USART
• Peripherals: WDT
• Number Of I /o: 32
• Program Memory Type: ROMless
• Ram Size: 136K x 8
• Voltage - Supply (vcc/vdd): 1.8 V ~ 3.6 V
• Oscillator Type: External
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 100-TQFP, 100-VQFP
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Eeprom Size: -
• Program Memory Size: -
• Data Converters: -

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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