CD2481 Datasheet, PDF (196/222 Pages) Intel Corporation – Programmable Four-Channel Communications Controller

CD2481 — Programmable Four-Channel Communications Controller
9.6.5.15 Transmit Current Buffer Address Lower (TCBADRL)
Register Name: TCBADRL
Register Description: Current Transmit Buffer Address, lower word
Default Value: x’0000
Access: Word Read Only
Bit 15
Bit 14
Bit 13
Bit 12
Bit 11
Bit 10
Binary Address Value, 32-bit Address, bits 15 - 8
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Binary Address Value, 32-bit Address, bits 7 - 0
Intel Hex Address: x’38
Motorola Hex Address: x’3A
Bit 9
Bit 8
Bit 1
Bit 0
9.6.5.16 Transmit Current Buffer Address Upper (TCBADRU)
Register Name: TCBADRU
Register Description: Current Transmit Buffer Address, upper word
Default Value: x’0000
Access: Word Read Only
Bit 15
Bit 14
Bit 13
Bit 12
Bit 11
Bit 10
Binary Address Value, 32-bit Address, bits 31 - 24
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Binary Address Value, 32-bit Address, bits 23 - 16
Intel Hex Address: x’3A
Motorola Hex Address: x’38
Bit 9
Bit 8
Bit 1
Bit 0
These registers contain the address of the current DMA buffer being used for transmit data,
updated at the end of transmit data transfers. In the case of a bus error during transmit data transfer,
this register contains the start address of the transfer causing the bus error.
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Datasheet