Telephone Signalling Transceiver / Least Cost Router
CMX860
1.5.12.5
Tx Data Register
Tx Data Register: 8-bit write-only.
'C-BUS' address $E3
7
6
5
4
3
2
1
0
Bit:
Data bits to be transmitted
In Synchronous Tx data mode this register contains the next 8 data bits to be transmitted. Bit 0 is
transmitted first.
In Tx Start-stop mode the specified number of data bits will be transmitted from this register (b0 first). A
Start bit, a Parity bit (if required) and Stop bit(s) will be added automatically.
This register should only be written to when the Tx Data Ready bit of the Status Register is 1.
1.5.12.6
Rx Data Register
Rx Data Register: 8-bit read-only.
'C-BUS' address $E5
7
6
5
4
3
2
1
0
Bit:
Received data bits
In unformatted Rx data mode this register contains 8 received data bits, b0 of the register holding the
earliest received bit, b7 the latest.
In Rx Start-stop data mode this register contains the specified number of data bits from a received
character, b0 holding the first received bit.
ã 2002 Consumer Microcircuits Limited
28
D/860/5
CMLMICRO [ CML MICROCIRCUITS ]
