
Am79C978
217
Am79C978 Programmable Registers (Continued)
Table 94.
Bus Configuration Registers
RAP Addr
0
1
2
Register
MSRDA
MSWRA
MC
Contents
Programs width of DMA read signal (DEFAULT = 5)
Programs width of DMA write signal (DEFAULT = 5)
Miscellaneous Configuration bits: (DEFAULT = 2)
8000 --
4000 --
2000 --
1000 --
Programs the function and width of the LED0 signal. (DEFAULT = 00C0)
8000
LEDOUT
4000
LEDPOL
2000
LEDDIS
1000
100E
0100 FDLSE
Programs the function and width of the LED1 signal. (DEFAULT = 0084)
8000
LEDOUT
4000
LEDPOL
2000
LEDDIS
1000
100E
0100 FDLSE
Programs the function and width of the LED2 signal. (DEFAULT = 0088)
8000
LEDOUT
4000
LEDPOL
2000
LEDDIS
1000
100E
0100 FDLSE
Programs the function and width of the LED3 signal. (DEFAULT = 0090)
8000
LEDOUT
4000
LEDPOL
2000
LEDDIS
1000
100E
0100 FDLSE
Full-Duplex Control. (DEFAULT= 0000)
8000
--
4000
--
2000
--
1000
--
0100
--
I/O Base Address Lower
I/O Base Address Upper
Burst Size and Bus Control (DEFAULT = 2101)
8000 ROMTMG3
4000 ROMTMG2
2000 ROMTMG1
1000 ROMTMG0
0100 EXTREQ
EEPROM Control and Status (DEFAULT = 0002)
8000
PVALID
4000
PREAD
2000
EEDET
1000
--
0100
--
Software Style (DEFAULT = 0000, maps to CSR 58)
0800 --
0400 --
0200 --
0100 APROMWE
0080 INITLEVEL
0040
--
0020
--
0010
--
0008
0004
0002
--
EADISEL
--
ASEL 0001
4
LED0
0800 --
0400 --
0200 MPSE
0080
0040
0020
0010
PSE
LNKSE
RCVME
XMTE
0008
0004
0002
0001
POWER
RCVE
SPEED
COLE
5
LED1
0800 --
0400 --
0200 MPSE
0080
0040
0020
0010
PSE
LNKSE
RCVME
XMTE
0008
0004
0002
0001
POWER
RCVE
SPEED
COLE
6
LED2
0800 --
0400 --
0200 MPSE
0080
0040
0020
0010
PSE
LNKSE
RCVME
XMTE
0008
0004
0002
0001
POWER
RCVE
SPEED
COLE
7
LED3
0800 --
0400 --
0200 MPSE
0080
0040
0020
0010
PSE
LNKSE
RCVME
XMTE
0008
0004
0002
0001
POWER
RCVE
SPEED
COLE
9
FDC
0800
0400
0200
--
--
--
0080
0040
0020
0010
--
--
--
--
0008
0004
0002
0001
--
FDRPAD
--
FDEN
16
17
18
IOBASEL
IOBASEU
BSBC
0800 NOUFLO
0400
--
0200 MEMCMD
0080 DWIO
0040 BREADE
0020 BWRITE
0010 --
0008
0004
0002
0001
--
--
--
--
19
EECAS
0800
0400
0200
--
--
--
0080
0040
0020
0010
--
--
--
EEN
0008
0004
0002
0001
--
ECS
ESK
EDI/EDO
20
SWSTYLE