CMX865D2 CML Microcircuits, CMX865D2 Datasheet - Page 25

• Manufacturer Part Number: CMX865D2
• Description: FSK Modem and DTMF Codec
• Manufacturer: CML Microcircuits

FSK Modem and DTMF Codec
5.10.5 Tx Data Register
Tx Data Register: 8-bit write-only.
In Tx Synchronous mode, this register contains the next 8 data bits to be transmitted. b0 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.
5.10.6 Rx Data Register
Rx Data Register: 8-bit read-only.
In Rx synchronous mode, this register contains 8 received data bits, b0 of the register holding the earliest
received bit, b7 the latest.
In Rx Start-Stop mode, this register contains the specified number of data bits from a received character,
b0 holding the first received bit.
© 2005 CML Microsystems Plc
Bit:
Bit:
7
7
6
6
Data bits to be transmitted
5
5
Received data bits
4
4
3
3
2
2
C-BUS address $E3
C-BUS address $E5
1
1
0
0
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