M55800A Atmel Corporation, M55800A Datasheet - Page 29

• Manufacturer Part Number: M55800A
• Manufacturer: Atmel Corporation

Specifications of M55800A

• Flash (kbytes): 0 Kbytes
• Pin Count: 176
• Max. Operating Frequency: 33 MHz
• Cpu: ARM7TDMI
• Hardware Qtouch Acquisition: No
• Max I/o Pins: 58
• Ext Interrupts: 58
• Usb Speed: No
• Usb Interface: No
• Spi: 1
• Uart: 3
• Graphic Lcd: No
• Video Decoder: No
• Camera Interface: No
• Adc Channels: 8
• Adc Resolution (bits): 10
• Adc Speed (ksps): 72
• Resistive Touch Screen: No
• Dac Channels: 1
• Dac Resolution (bits): 10
• Temp. Sensor: No
• Crypto Engine: No
• Sram (kbytes): 8
• 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: 3.3/5.0
• Fpu: No
• Mpu / Mmu: no / no
• Timers: 6
• Output Compare Channels: 6
• Input Capture Channels: 6
• 32khz Rtc: Yes
• Calibrated Rc Oscillator: No

11.5
1745F–ATARM–06-Sep-07
Boot on NCS0
Figure 11-6
Figure 11-6. Connection for a 16-bit Data Bus Without Byte-write Capability.
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 Memory. In this case,
EBI_CSR0 (Chip-select Register 0) is reset at the following configuration for chip select 0:
Byte access type and number of data float time are respectively set to Byte-write Access and 0.
With a nonvolatile memory interface, any value can be programmed for these parameters.
Before the remap command, the user can modify the chip select 0 configuration, programming
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
shows how to connect a 16-bit device without byte access (e.g. Flash) on NCS2.
EBI
D8 - D15
A1 - A19
D0 - D7
NCS2
NWE
NOE
NUB
NLB
D0 - D7
D8 - D15
A0 - A18
Write Enable
Output Enable
Memory Enable
AT91M5880A
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