REGISTER PROGRAMMING SUMMARY
Am79C978 Programmable Registers
Table 93. Control and Status Registers
Register
Contents
CSR0
Status and control bits: (DEFAULT = 0004)
0080
0040
INTR
IENA
0008
0004
0002
TDMD
STOP
STRT
8000
4000
2000
1000
ERR
--
CERR
MISS
0800
0400
0200
0100I
MERR
RINT
TINT
0020
0010
RXON
TXON
IDON
0001
INIT
CSR1
CSR2
CSR3
Lower IADR (Maps to CSR 16)
Upper IADR (Maps to CSR 17)
Interrupt masks and Deferral Control: (DEFAULT = 0)
8000
4000
2000
1000
--
--
--
0800
0400
0200
0100
MERRM
RINTM
TINTM
IDONM
0080 --
0008
0004
0002
0001
EMBA
BSWP
--
--
0040 DXSUFLO
0020 LAPPEN
0010 DXMT2PD
MISSM
CSR4
CSR5
CSR7
Interrupt masks, configuration and status bits: (DEFAULT = 0115)
8000
4000
2000
1000
--
0800
0400
0200
0100
APAD_XMT
ASTRP_RCV
MFCO
0080
0040
0020
0010
UNITCMD
UNIT
RCVCCO
RCVCCOM
0008
0004
0002
0001
TXSTRT
TXSTRTM
--
--
DMAPLUS
--
TXDPOLL
MFCOM
Extended Interrupt masks, configuration and status bits: (DEFAULT = 0XXX)
8000
4000
2000
1000
TOKINTD
LTINTEN
--
--
0800
0400
0200
0100
SINT
SINTE
--
0080
0040
0020
0010
EXDINT
EXDINTE
MPPLBA
MPINT
0008
0004
0002
0001
MPINTE
MPEN
MPMODE
SPND
--
Extended Interrupt masks, configuration and status bits: (DEFAULT = 0000)
8000
4000
2000
1000
FASTSPND 0800
STINT
0080
0040
0020
0010
MAPINT
MAPINTE
MCCINT
MCCINTE
0008
0004
0002
0001
MCCIINT
RXFRMTG
RDMD
0400
0200
0100
STINTE
MREINT
MREINTE
MCCIINTE
MIIPDTINT
MIIPDTNTE
RXDPOLL
CSR8 - CSR11 Logical Address Filter
CSR12 - CSR14 Physical Address Register
MODE: (DEFAULT = 0)
bits [8:7] = PORTSEL, Port Selection
CSR15
11
10
PHY Selected
Reserved
8000
4000
2000
1000
PROM
DRCVBC
DRCVPA
--
0800
0400
0200
0100
--
--
0080
0040
0020
0010
PORTSEL0
INTL
DRTY
0008
0004
0002
0001
DXMTFCS
LOOP
DTX
--
PORTSEL1
FCOLL
DRX
CSR47
CSR49
TXPOLLINT: Transmit Polling Interval
RXPOLLINT: Receive Polling Interval
Software Style (mapped to BCR20)
bits [7:0] = SWSTYLE, Software Style Register.
CSR58
0000
0002
LANCE/PCnet-ISA
PCnet-32
8000
4000
2000
1000
--
--
--
--
0800
0400
0200
0100
--
0080
0040
0020
0010
--
--
--
--
0008
0004
0002
0001
SWSTYLE3
SWSTYLE2
--
APERREN
--
SSIZE32
SWSTYLE0
Am79C978
215
AMD [ AMD ]
