AT91SAM7S256D-AU Atmel, AT91SAM7S256D-AU Datasheet - Page 97

• Manufacturer Part Number: AT91SAM7S256D-AU
• Description: ARM Microcontrollers - MCU 256K Flash SRAM 64K ARM based MCU
• Manufacturer: Atmel
• Series: SAM7S256r

Specifications of AT91SAM7S256D-AU

• Rohs: yes
• Core: ARM
• Processor Series: AT91SAM
• Data Bus Width: 16 bit/32 bit
• Maximum Clock Frequency: 55 MHz
• Program Memory Size: 256 KB
• Data Ram Size: 64 KB
• On-chip Adc: Yes
• Operating Supply Voltage: 3 V to 3.6 V
• Operating Temperature Range: - 40 C to + 85 C
• Package / Case: LQFP-64
• Mounting Style: SMD/SMT
• Interface Type: 2-Wire, I2S, SPI, USART
• Length: 7 mm

18. Memory Controller (MC)
18.1
18.2
Figure 18-1. Memory Controller Block Diagram
18.3
Overview
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.
Block Diagram
Functional Description
The Memory Controller handles the internal ASB bus and arbitrates the accesses of both masters.
ARM7TDMI
Processor
Peripheral
Controller
DMA
Abort
Peripheral N
Peripheral 0
Peripheral 1
Memory Controller
Arbiter
Bus
ASB
Misalignment
Interface
Detector
Status
Abort
User
Bridge
APB
APB
Decoder
Address
Embedded
Controller
Flash
SAM7S Series [DATASHEET]
From Master
to Slave
6175M–ATARM–26-Oct-12
Internal
Internal
Flash
RAM
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