CS8920 データシートの表示（PDF） - Cirrus Logic
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CS8920 Datasheet PDF : 66 Pages
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CS8920 Technical Reference Manual
Addr.
1Ch
1Dh
1Eh
1Fh
20h
21h
22h
23h
24h
Description
Bit(s) Function
IA bits[39-32], bits[47-40]
IA bits[ 23-16], bits[31-24]
15-0 IEEE individual node address
15-0 IEEE individual node address
IA bits[ 7-0], bits[15-8]
ISA Configuration Flags
15-0 IEEE individual node address
Memory Mode Flag
Boot PROM Flag
StreamTransfer
15 0 = memory mode disabled, 1 = memory mode enabled
14 0 = no Boot PROM, 1= Boot PROM installed
13 0 = disabled, 1 = enabled
DMA Burst
RxDMA Only
12 0 = disabled, 1 = enabled
11 0 = disabled, 1 = enabled
Auto RxDMA
DMA Buffer Size
IOCHRDY Enable
10 0 = disabled, 1 = enabled
9 0 = 16K, 1 = 64K
8 0 = disabled, 1 = enabled
Use SA
DMA Channel
IRQ
7 0 = disabled, 1 = enabled
6-4 5 = DRQ5, 6 = DRQ6, etc. (same as PP_374) **
3-0 10 = IRQ10, 5 = IRQ5, etc. (same as PP_370) **
PacketPage Mem Base
Reserved
Boot PROM Base
15-4
3-0
15-4
12 MSBs of 24-bit address (lower 12 bits assumed = 0)
Reserved for future use, set to 0
12 MSBs of 24-bit address (lower 12 bits assumed = 0)
Reserved
Boot PROM Mask
3-0 Reserved for future use, set to 0
15-4 12 MSBs of 24-bit addr mask (lower 12 bits assumed = 0)
Reserved
AutoNegCTL
Force FDX
3-0 Reserved for future use, set to 0
15 0 = Do not force FDX, 1 = Force FDX
Reserved
NLP Enable
14-10 Reserved for future use, set to 0
9 0 = disabled, 1 = enabled
AutoNeg Enable
Allow FDX
Reserved
8 0 = disabled, 1 = enabled
7 0 = disabled, 1 = enabled
6-0 Reserved for future use, set to 0
Adapter Configuration
Ext. 10B-2 Cable Circuitry 15 0 = Not Present, 1 = Present
LoRx Squelch
PolarityDis
Optimization Flags
14 0 = LoRx Squelch disabled, 1 = LoRx Squelch enabled
13 0 = polarity correction enabled, 1= polarity correction disabled
12-11 00 = Server, 01 = DOS Client, 10 = Multi-OS Client
AN84REV1
41
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