TI380C30A Datasheet, PDF (26/81 Pages) Texas Instruments – INTEGRATED TOKEN-RING COMMPROCESSOR AND PHYSICAL-LAYER INTERFACE

TI380C30A
INTEGRATED TOKEN-RING COMMPROCESSOR
AND PHYSICAL-LAYER INTERFACE
SPWS034 – MARCH 1998
Table 4. User-Access Hardware Registers (Continued)
68xxx MODE
(SI/M = 0)†
WORD TRANSFERS
NORMAL MODE
SUDS = 0, SLDS = 0
BYTE TRANSFERS
SUDS = 0, SLDS = 1
SUDS = 1, SLDS = 0
SRSX SRS0 SRS1
0
0
0
SIFDAT MSB
SIFDAT LSB
0
0
1
SIFDAT/INC MSB
SIFDAT/INC LSB
0
1
0
SIFADR MSB
SIFADR LSB
0
1
1
SIFCMD
SIFSTS
1
0
0
SIFACL MSB
SIFACL LSB
1
0
1
SIFADR MSB
SIFADR LSB
1
1
0
SIFADX MSB
SIFADX LSB
1
1
1
DMALEN MSB
† _{68xxx mode is always a 16-bit mode.}
DMALEN LSB
PSEUDO-DMA MODE ACTIVE
SUDS = 0, SLDS = 0
SUDS = 0, SLDS = 1
SUDS = 1, SLDS = 0
SDMADAT MSB
DMALEN MSB
SDMAADR MSB
SDMAADX MSB
SIFACL MSB
SIFADR MSB
SIFADX MSB
DMALEN MSB
SDMADAT LSB
DMALEN LSB
SDMAADR LSB
SDMAADX LSB
SIFACL LSB
SIFADR LSB
SIFADX LSB
DMALEN LSB
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