DM9010BI DAVICOM [Davicom Semiconductor, Inc.], DM9010BI Datasheet - Page 19

• Manufacturer Part Number: DM9010BI
• Description: Industrial-temperature 10/100 Mbps Single Chip Ethernet Controller With General Processor Interface
• Manufacturer: DAVICOM [Davicom Semiconductor, Inc.]

6.9 Back Pressure Threshold Register (08H)
6.10 Flow Control Threshold Register (09H)
6.11 RX/TX Flow Control Register (0AH)
Preliminary
Version: DM9010BI--DS-P01
January 12, 2010
Bit
7:4
7:4
3:0
Bit
Bit
:0
7
6
5
BPHW
HWOT
TXPEN
LWOT
Name
Name
Name
TXPF
TXP0
JPT
HPS0,RW
HPS0,RW
HPS0,RW
Default
Default
PHS3,
PHS7,
PHS3,
PHS8,
Default
RW
RW
RW
RW
Industrial-temperature Single Chip Ethernet Controller with General Processor Interface
Back Pressure High Water Overflow Threshold. MAC will generate the jam pattern
when RX SRAM free space is lower than this threshold value
Default is 3K-byte free space. Please do not exceed SRAM size
(1 unit=1K bytes)
Jam Pattern Time. Default is 200us
bit3 bit2 bit1 bit0
RX FIFO High Water Overflow Threshold
Send a pause packet with pause_ time=FFFFH when the RX RAM free space is
less than this value., If this value is zero, its means no free RX SRAM space.
Default is 3K-byte free space. Please do not exceed SRAM size (1 unit=1K bytes)
RX FIFO Low Water Overflow Threshold
Send a pause packet with pause time=0000 when RX SRAM free space is larger
than this value. This pause packet is enabled after the high water pause packet is
transmitted. Default SRAM free space is 8K-byte. Please do not exceed SRAM
size
(1 unit=1K bytes)
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
TX Pause Packet
Auto clears after pause packet transmission completion. Set to TX pause packet
with time = 0000h
TX Pause packet
Auto clears after pause packet transmission completion. Set to TX pause packet
with time = FFFFH
Force TX Pause Packet Enable
Enables the pause packet for high/low water threshold control
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
100us
150us
200us
250us
300us
350us
400us
450us
500us
550us
600us
time
10us
15us
25us
50us
5us
Description
Description
Description
DM9010BI
19