EP80579 Datasheet, PDF (774/1916 Pages) Intel Corporation – Intel® EP80579 Integrated Processor Product Line

Intel^® EP80579 Integrated Processor
20.2.1.10 Offset 0Bh: DMA_CHM - DMA Channel Mode Register
Table 20-13. Offset 0Bh: DMA_CHM - DMA Channel Mode Register
Description:
View: IA F 1^a Base Address: 0000h (IO)
Offset Start: 0Bh
Offset End: 0Bh
View: IA F 1 Base Address: 0000h (IO)
Offset Start: 1Bh
Offset End: 1Bh
View: IA F 2^b Base Address: 0000h (IO)
Offset Start: D6h
Offset End: D6h
View: IA F 2 Base Address: 0000h (IO)
Offset Start: D7h
Offset End: D7h
Size: 8 bit
Default: 000000XXh
Power Well: Core
Bit Range Bit Acronym
Bit Description
Sticky
07 : 06
05
04
03 : 02
01 : 00
DMATM
ADDIDS
AUTOEN
DMATT
DMACSEL
DMA Transfer Mode: Each DMA channel can be
programmed in one of four different modes:
00 Demand mode
01 Single mode
10 Reserved
11 Cascade mode
Address Increment/Decrement Select: This bit
controls address increment/decrement during DMA
transfers.
0 = Address increment is selected.
1 = Address decrement is selected.
Address increment is the default after part reset or Master
Clear.
Autoinitialize Enable:
0 = The autoinitialize feature is disabled and DMA
transfers terminate on a terminal count. A part reset
or Master Clear disables autoinitialization.
1 = The DMA restores the Base Address and Count
registers to the current registers following a terminal
count (TC).
DMA Transfer Type: These bits represent the direction
of the DMA transfer. When the channel is programmed for
cascade mode, (bits[07:06] = “11”) the transfer type is
irrelevant.
00 Verify - No I/O or memory strobes are generated
01 Write - Data transfers from the I/O devices to memory
10 Read - Data transfers from memory to the I/O device
11 Illegal
DMA Channel Select: These bits select the DMA Channel
Mode Register that are written by bits [07:02].
00 Channel 0 (4)
01 Channel 1 (5)
10 Channel 2 (6)
11 Channel 3 (7)
a. View 1 describes the control registers for Channels 0-3.
b. View 2 describes the control registers for Channels 4-7.
Bit Reset
Value
00h
0h
0h
00h
XX
Bit Access
WO
WO
WO
WO
WO
Intel^® EP80579 Integrated Processor Product Line Datasheet
774
August 2009
Order Number: 320066-003US