CS5535-UDCF AMD (ADVANCED MICRO DEVICES), CS5535-UDCF Datasheet - Page 119

• Manufacturer Part Number: CS5535-UDCF
• Manufacturer: AMD (ADVANCED MICRO DEVICES)

Specifications of CS5535-UDCF

• Operating Temperature (min): 0C
• Operating Temperature (max): 85C
• Operating Temperature Classification: Commercial
• Mounting: Surface Mount
• Lead Free Status / RoHS Status: Compliant

Direct Memory Access Module
5.9
The Direct Memory Access (DMA) module supports indus-
try standard DMA architecture using two 8237-compatible
DMA controllers in cascaded configuration. Figure 5-21
shows the DMA module partitioning. It consists of two stan-
dard 8237 DMA controllers, a bus interface, address map-
per, and source mapper.
Features
• 32-bit address range support via high page registers.
• Supports the standard 7-channel DMA configuration, out
• DMA mapper to route DMA sources to the four 8-bit
• DMA sources from the LPC bus, and from transmit and
AMD Geode™ CS5535 Companion Device Data Book
of which the four 8-bit channels are used.
DMA channels.
receive buffers from the two on-chip UARTs are
supported.
Data LBus I/F
Direct Memory Access Module
Bus Interface
and Registers
Figure 5-21. DMA Module Block Diagram
8237
8237
• Allow the data bus to be released in between DMA
5.9.1
The Core Logic module supports seven DMA channels
using two standard 8237-equivalent controllers. DMA Con-
troller 1 contains Channels 0 through 3 and supports 8-bit
I/O adapters. These channels are used to transfer data
between 8-bit peripherals and system memory. Using the
high and low page address registers, a full 32-bit address
is output for each channel so they can all transfer data
throughout the entire 4 GB system address space. Each
channel can transfer data in 64 KB pages.
DMA Controller 2 is unused.
transfers during demand or bulk mode to allow transfers
to the DMA module or the module doing DMA transfers.
LPC and DMA
Interfaces with
DMA mapper
DMA Controllers
31506B
DMA Acks
LPC I/F
DMA R/W Controls
DMA Requests
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