AT91SAM7SE256B-CUR Atmel, AT91SAM7SE256B-CUR Datasheet - Page 87

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

Specifications of AT91SAM7SE256B-CUR

• 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

18. Memory Controller (MC)
18.1
18.2
Figure 18-1. Memory Controller Block Diagram
6222F–ATARM–14-Jan-11
Overview
Block Diagram
ARM7TDMI
Processor
Peripheral
Controller
DMA
The Memory Controller (MC) manages the ASB bus and controls accesses requested by the
masters, typically the ARM7TDMI processor and the Peripheral DMA Controller. It features a
simple bus arbiter, an address decoder, an abort status, a misalignment detector and an
Embedded Flash Controller. In addition, the MC contains a Memory Protection Unit (MPU) con-
sisting of 16 areas that can be protected against write and/or user accesses. Access to
peripherals can be protected in the same way.
Abort
Peripheral N
Peripheral 0
Peripheral 1
Memory Controller
Arbiter
Bus
ASB
Misalignment
Protection
Interface
Memory
Detector
Status
Abort
User
Unit
SAM7SE512/256/32 Preliminary
Bridge
APB
APB
Address
Decoder
Embedded
Controller
Flash
From Master
to Slave
External
Interface
Internal
Internal
Flash
RAM
Bus
87