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