EP9312-CB Cirrus Logic Inc, EP9312-CB Datasheet - Page 497

• Manufacturer Part Number: EP9312-CB
• Description: System-on-Chip Processor
• Manufacturer: Cirrus Logic Inc
• Series: EP9r

Specifications of EP9312-CB

• Peak Reflow Compatible (260 C): No
• A/d Converter: 12 Bits
• Leaded Process Compatible: No
• No. Of I/o Pins: 65
• Package / Case: 352-BGA
• Core Processor: ARM9
• Core Size: 16/32-Bit
• Speed: 200MHz
• Connectivity: EBI/EMI, EIDE, Ethernet, I²C, IrDA, Keypad/Touchscreen, SPI, UART/USART, USB
• Peripherals: AC'97, DMA, I&sup2:S, LCD, LED, MaverickKey, POR, PWM, WDT
• Number Of I /o: 16
• Program Memory Type: ROMless
• Ram Size: 32K x 8
• Voltage - Supply (vcc/vdd): 1.65 V ~ 3.6 V
• Data Converters: A/D 8x12b
• Oscillator Type: External
• Operating Temperature: 0°C ~ 70°C
• Processor Series: EP93xx
• Core: ARM920T
• Data Bus Width: 32 bit
• 3rd Party Development Tools: MDK-ARM, RL-ARM, ULINK2
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Eeprom Size: -
• Program Memory Size: -
• Lead Free Status / Rohs Status: No
• Other names: 598-1257

DS785UM1
13.1 Introduction
13.2 Booting from SyncROM or SyncFLASH
The SDRAM controller provides a high speed memory interface to single-data-rate SDRAMs,
Synchronous FLASH, and Synchronous ROMs.
The key features of the SDRAM controller are:
During power-on reset, if the values on the processor pins shown in
either a Synchronous ROM device or Synchronous FLASH device to be used for booting up
the processor, a short configuration sequence is activated and completed before the
processor is released from power-on reset. By default, Synchronous Memory Bank 3,
controlled by device configuration register SDRAMDevCfg[3:0], is used for booting.
For a Synchronous ROM device, the configuration sequence writes RAS = 0x2 and CAS =
0x5 to the SDRAMDevCfg[3:0] register and writes RAS = 0x2, CAS = 0x5, and either Burst
Note: In the EP9301 and 9302 processors, the common address/data bus is 16-bits wide
Note: In the EP9307, EP9312, and EP9315 processors, the common address/data bus is
• Raster DMA input port for high-bandwidth display refreshing.
• Up to four synchronous memory banks that can be independently configured
• Special configuration bits for Synchronous ROM operation
• Ability to program Synchronous FLASH devices using write and erase commands
• Data is transferred between the controller and the synchronous memory device in quad-
• Programmable for 16 or 32-bit data bus: EP9307, EP9312, and EP9315 processors only
• SDRAM contents are preserved when a “soft” reset is asserted
• Power saving synchronous memory clock enable
word bursts.
13SDRAM, SyncROM, and SyncFLASH Controller
and the SDRAM, SyncROM, and SyncFLASH synchronous memory controller
supports 16-bit and 8-bit devices.
programmable to be either 16-bits or 32-bits wide and the SDRAM, SyncROM, and
SyncFLASH synchronous memory controller supports 32-bit , 16-bit, and 8-bit
devices.
Copyright 2007 Cirrus Logic
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