83C795 Datasheet, PDF (48/136 Pages) List of Unclassifed Manufacturers – Ethernet System Controller

ETHERNET SYSTEM CONTROLLER REGISTERS
83C795
STA Registers
STA0
STA1
STA2
STA3
STA4
STA5
RESET
BIT 7
DA07
DA15
DA23
DA31
DA39
DA47
X
BIT 6
DA06
DA14
DA22
DA30
DA38
DA46
X
BIT 5
DA05
DA13
DA21
DA29
DA37
DA45
X
BIT 4
DA04
DA12
DA20
DA28
DA36
DA44
X
BIT 3
DA03
DA11
DA19
DA27
DA35
DA43
X
BIT 2
DA02
DA10
DA18
DA26
DA34
DA42
X
BIT 1
DA01
DA09
DA17
DA25
DA33
DA41
X
TABLE 5-11. STATION ADDRESS REGISTER BITS
BIT 0
DA00
DA08
DA16
DA24
DA32
DA40
X
5.2.33 TADDH - Transmit Burst Starting
Address High Register
Normal Map R ead/Write Port = 2:1B
T his is the higher 8 bits of a register pair us ed
internally by theDMAcontroller as as cratch padfor
the burst addres s of the trans mit proces s . Writing
to the T ADDH and T ADDL R egis ters while
communication is taking place may caus e errors in
the DMA proces s .
5.2.34 TADDL - Transmit Burst Starting
Address Low Register
Normal Map R ead/Write Port = 2:1A
T his regis ter contains the lower 8 bits for a regis ter
pair us ed internally by the DMA controller as a
s cratch pad for the burst addres s of the transmit
proces s . Writing to the T ADDH and T ADDL
regis ters while communication is taking place may
caus e errors in the DMA proces s .
BIT
7 A15
6 A14
5 A13
4 A12
3 A11
2 A10
1 A09
0 A08
TADDH
RESET
X
X
X
X
X
X
X
X
BIT
7 A07
6 A06
5 A05
4 A04
3 A03
2 A02
1 A01
0 A00
TADDL
RESET
X
X
X
X
X
X
X
X
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