w83l517g Winbond Electronics Corp America, w83l517g Datasheet - Page 69

• Manufacturer Part Number: w83l517g
• Description: Winbond Lpc I/o For Notebook W83l517d/ W83l517d-f
• Manufacturer: Winbond Electronics Corp America

8.4.3
Reading this register returns E0H. Writing a value selects Register Set.
Bit 1:
Bit 0:
Bit 4:
Bit 3:
Bit 2:
Refault Value
REG.
SSR
Reg3 - Sets Select Register (SSR)
DMATHL
0
1
DMA_F - DMA Fairness
ADV_SL - Advanced Mode Select
A write to 1 selects advanced mode.
ALOOP - All Mode Loopback
A write to 1 will enable loopback in all modes.
D_CHSW - DMA TX/RX Channel Swap
If only one DMA channel operates in MIR/FIR mode, then the DMA channel can be
swapped.
A write to 1 will enable output data when ALOOP=1.
DMATHL - DMA Threshold Level
Set DMA threshold level as shown in the following table.
SSR7
BIT 7
1
DMA_F
SSR6
BIT 6
1
0
1
16-Byte
13
23
SSR5
BIT 5
TX FIFO THRESHOLD
1
D_CHSW
- 69 -
SSR4
BIT 4
0
1
0
DMA request (DREQ) is forced inactive after
W83L517D/W83L517D-F
SSR3
BIT 3
32-Byte
0
13
No effect DMA request.
7
Publication Release Date: May 23, 2005
Function Description
SSR2
BIT 2
10.5us
DMA Channel Selected
0
Receiver (Default)
RX FIFO THRESHOLD
Transmitter
SRR1
BIT 1
(16/32-Byte)
0
10
4
Revision 1.0
SRR0
BIT 0
0