SAM7SE256 Atmel Corporation, SAM7SE256 Datasheet - Page 161

• Manufacturer Part Number: SAM7SE256
• Manufacturer: Atmel Corporation

Specifications of SAM7SE256

• Flash (kbytes): 256 Kbytes
• Pin Count: 144
• Max. Operating Frequency: 48 MHz
• Cpu: ARM7TDMI
• Hardware Qtouch Acquisition: No
• Max I/o Pins: 88
• Ext Interrupts: 88
• Usb Transceiver: 1
• Usb Speed: Full Speed
• Usb Interface: Device
• Spi: 1
• Twi (i2c): 1
• Uart: 3
• Ssc: 1
• Graphic Lcd: No
• Video Decoder: No
• Camera Interface: No
• Adc Channels: 8
• Adc Resolution (bits): 10
• Adc Speed (ksps): 384
• Resistive Touch Screen: No
• Temp. Sensor: No
• Crypto Engine: No
• Sram (kbytes): 32
• Self Program Memory: NO
• External Bus Interface: 1
• Dram Memory: sdram
• Nand Interface: Yes
• Picopower: No
• Temp. Range (deg C): -40 to 85
• I/o Supply Class: 1.8/3.3
• Operating Voltage (vcc): 3.0 to 3.6
• Fpu: No
• Mpu / Mmu: Yes / No
• Timers: 3
• Output Compare Channels: 3
• Input Capture Channels: 3
• Pwm Channels: 4
• 32khz Rtc: Yes
• Calibrated Rc Oscillator: No

22. Static Memory Controller (SMC)
22.1
22.2
6222F–ATARM–14-Jan-11
Overview
Block Diagram
The Static Memory Controller (SMC) generates the signals that control the access to external
static memory or peripheral devices. The SMC is fully programmable. It has eight chip selects
and a 23-bit address bus. The 16-bit data bus can be configured to interface with 8- or 16-bit
external devices. Separate read and write control signals allow for direct memory and peripheral
interfacing. The SMC supports different access protocols allowing single clock cycle memory
accesses. It also provides an external wait request capability.
Figure 22-1. Static Memory Controller Block Diagram
Controller
Memory
PMC
Chip Select
SMC
MCK
SMC
APB
User Interface
SAM7SE512/256/32
Controller
PIO
NCS[7:0]
NRD
NWR0/NWE
NWR1/NUB
A0/NLB
A[22:1]
D[15:0]
NWAIT
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