AT91R40807-33AI Atmel, AT91R40807-33AI Datasheet - Page 26

• 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: -

Boot on NCS0
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AT91X40 Series
Depending on the device and the BMS pin level during the reset, the user can select
either an 8-bit or 16-bit external memory device connected on NCS0 as the Boot Mem-
ory. In this case, EBI_CSR0 (Chip Select Register 0) is reset at the following
configuration for chip select 0:
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•
Byte access type and number of data float time are respectively set to Byte Write
Access and 0. With a non-volatile memory interface, any values can be programmed for
these parameters.
Before the remap command, the user can modify the chip select 0 configuration, pro-
gramming the EBI_CSR0 with exact boot memory characteristics. the base address
becomes effective after the remap command, but the new number of wait states can be
changed immediately. This is useful if a boot sequence needs to be faster.
8 wait states (WSE = 1, NWS = 7)
8-bit or 16-bit data bus width, depending on BMS
1354D–ATARM–08/02