AT91RM9200-CI-002 Atmel, AT91RM9200-CI-002 Datasheet - Page 157

• Manufacturer Part Number: AT91RM9200-CI-002
• Description: IC ARM9 MCU 256 BGA
• Manufacturer: Atmel
• Series: AT91SAMr

Specifications of AT91RM9200-CI-002

• Core Processor: ARM9
• Core Size: 16/32-Bit
• Speed: 180MHz
• Connectivity: EBI/EMI, Ethernet, I²C, MMC, SPI, SSC, UART/USART, USB
• Peripherals: POR
• Number Of I /o: 122
• Program Memory Size: 128KB (128K x 8)
• Program Memory Type: ROM
• Ram Size: 48K x 8
• Voltage - Supply (vcc/vdd): 1.65 V ~ 1.95 V
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 256-BGA
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Eeprom Size: -
• Data Converters: -

18.5
18.5.1
18.6
18.6.1
18.6.1.1
Figure 18-2. Case of an External Memory Smaller than Page Size
18.6.1.2
1768I–ATARM–09-Jul-09
Product Dependencies
Functional Description
I/O Lines
External Memory Interface
External Memory Mapping
Chip Select Lines
Memory
Map
The pins used for interfacing the Static Memory Controller may be multiplexed with the PIO
lines. The programmer must first program the PIO controller to assign the Static Memory Con-
troller pins to their peripheral function. If I/O lines of the Static Memory Controller are not used by
the application, they can be used for other purposes by the PIO Controller.
The memory map is defined by hardware and associates the internal 32-bit address space with
the external 23-bit address bus. Note that A[22:0] is only significant for 8-bit memory. A[22:1] is
used for 16-bit memory. If the physical memory device is smaller than the page size, it wraps
around and appears to be repeated within the page. The SMC correctly handles any valid
access to the memory device within the page. See
The Static Memory Controller provides up to eight chip select lines: NCS0 to NCS7.
1M Byte Device
1M Byte Device
1M Byte Device
1M Byte Device
Low
Low
Low
Low
Hi
Hi
Hi
Hi
Base + 4M Bytes
Base + 3M Bytes
Base + 2M Bytes
Base + 1M Byte
Base
Figure
18-2.
Repeat 3
Repeat 2
Repeat 1
AT91RM9200
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