AT91SAM7SE256B-AUR Atmel, AT91SAM7SE256B-AUR Datasheet - Page 163

• Manufacturer Part Number: AT91SAM7SE256B-AUR
• Description: IC ARM7 MCU FLASH 256K 128-LQFP
• Manufacturer: Atmel
• Series: AT91SAMr

Specifications of AT91SAM7SE256B-AUR

• Core Processor: ARM7
• Core Size: 16/32-Bit
• Speed: 55MHz
• Connectivity: EBI/EMI, I²C, SPI, SSC, UART/USART, USB
• Peripherals: Brown-out Detect/Reset, POR, PWM, WDT
• Number Of I /o: 88
• Program Memory Size: 256KB (256K x 8)
• Program Memory Type: FLASH
• Ram Size: 32K x 8
• Voltage - Supply (vcc/vdd): 1.65 V ~ 1.95 V
• Data Converters: A/D 8x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: *
• Processor Series: SAM7SE256
• Core: ARM7TDMI
• Data Bus Width: 32 bit
• Data Ram Size: 32 KB
• Interface Type: SPI, USB
• Maximum Clock Frequency: 48 MHz
• Number Of Programmable I/os: 88
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• Operating Temperature Range: - 40 C to + 85 C
• Processor To Be Evaluated: AT91SAM7SE256B
• Supply Current (max): 60 uA
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Lead Free Status / Rohs Status: Details

22.5
22.5.1
22.6
22.6.1
22.6.1.1
6222F–ATARM–14-Jan-11
Product Dependencies
Functional Description
I/O Lines
External Memory Interface
External Memory Mapping
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
Figure 22-2. Case of an External Memory Smaller than Page Size
Memory
Map
1M Byte Device
1M Byte Device
1M Byte Device
1M Byte Device
SAM7SE512/256/32 Preliminary
Low
Low
Low
Low
Hi
Hi
Hi
Hi
Figure
22-2.
Base + 4M Bytes
Base + 3M Bytes
Base + 2M Bytes
Base + 1M Byte
Base
Repeat 3
Repeat 2
Repeat 1
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