Mobile Ddr Sdram; Multiplexing On Interfaces; Power Module - Mistral OMAP35 Series Hardware User's Manual

OMAP35x Evaluation Module
The NAND flash memory is used primarily as a boot device and to create file
system on the OMAP EVM. The GPMC CS0 is configured for 16-bit wide access
on the OMAP35x EVM.

2.2.3 Mobile DDR SDRAM

64Mx32 bit Mobile DDR SDRAM memory is interfaced to the SDRC CS0 space of
the OMAP Processor. The internal DDR controller uses a PLL to control the DDR
memory timing. Memory refresh for DDR is handled automatically by the OMAP
internal DDR controller.

2.2.4 Multiplexing on Interfaces:

To support additional interfaces with the limited pin-out available on expansion
connector, the UART3, McBSP2/3, interfaces are multiplexed on the processor
board using multiplexers.
The McBSP2 and McBSP3 are multiplexed between the Power module and the
expansion connector on EVM main board.
The UART 3 interface is multiplexed between the EVM main board connector
P21 and expansion connector.
These multiplexer selections are manually controlled through switch SW1
configuration on the OMAP processor module.
2.3

Power Module

The Power Module has TPS65950 Power and Audio companion device, which is
responsible for OMAP power management, clock and reset generation. This can
support multiple power supply designs in the EVM architecture. Communication
to the OMAP Processor is via the High Speed I2C interface for voltage scaling,
configuration, and ON/OFF control.
In addition to the power management functions, the TPS65950 handles:
• HS USB Transceiver (optional)
• Battery charger
• Keypad interface
Hardware User Guide
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