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CS8920 Datasheet(PDF) 41 Page - Cirrus Logic

Part # CS8920
Description  Ethernet Controller
PDF  66 Pages
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Manufacturer  CIRRUS [Cirrus Logic]
Direct Link  http://www.cirrus.com
Logo CIRRUS - Cirrus Logic

CS8920 Datasheet(HTML) 41 Page - Cirrus Logic

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AN84REV1
41
CS8920 Technical Reference Manual
Addr.
Description
Bit(s)
Function
1Ch
IA bits[39-32], bits[47-40]
15-0
IEEE individual node address
1Dh
IA bits[ 23-16], bits[31-24]
15-0
IEEE individual node address
1Eh
IA bits[ 7-0], bits[15-8]
15-0
IEEE individual node address
1Fh
ISA Configuration Flags
Memory Mode Flag
15
0 = memory mode disabled, 1 = memory mode enabled
Boot PROM Flag
14
0 = no Boot PROM, 1= Boot PROM installed
StreamTransfer
13
0 = disabled, 1 = enabled
DMA Burst
12
0 = disabled, 1 = enabled
RxDMA Only
11
0 = disabled, 1 = enabled
Auto RxDMA
10
0 = disabled, 1 = enabled
DMA Buffer Size
9
0 = 16K, 1 = 64K
IOCHRDY Enable
8
0 = disabled, 1 = enabled
Use SA
7
0 = disabled, 1 = enabled
DMA Channel
6-4
5 = DRQ5, 6 = DRQ6, etc. (same as PP_374) **
IRQ
3-0
10 = IRQ10, 5 = IRQ5, etc. (same as PP_370) **
20h
PacketPage Mem Base
15-4
12 MSBs of 24-bit address (lower 12 bits assumed = 0)
Reserved
3-0
Reserved for future use, set to 0
21h
Boot PROM Base
15-4
12 MSBs of 24-bit address (lower 12 bits assumed = 0)
Reserved
3-0
Reserved for future use, set to 0
22h
Boot PROM Mask
15-4
12 MSBs of 24-bit addr mask (lower 12 bits assumed = 0)
Reserved
3-0
Reserved for future use, set to 0
23h
AutoNegCTL
Force FDX
15
0 = Do not force FDX, 1 = Force FDX
Reserved
14-10
Reserved for future use, set to 0
NLP Enable
9
0 = disabled, 1 = enabled
AutoNeg Enable
8
0 = disabled, 1 = enabled
Allow FDX
7
0 = disabled, 1 = enabled
Reserved
6-0
Reserved for future use, set to 0
24h
Adapter Configuration
Ext. 10B-2 Cable Circuitry
15
0 = Not Present, 1 = Present
LoRx Squelch
14
0 = LoRx Squelch disabled, 1 = LoRx Squelch enabled
PolarityDis
13
0 = polarity correction enabled, 1= polarity correction disabled
Optimization Flags
12-11
00 = Server, 01 = DOS Client, 10 = Multi-OS Client



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