Low Power V.32 bis Modem
CMX869
Status Register Rx Data Ready and Rx Data Overflow bits
Whenever a new character or characters is copied into the C-BUS Rx Data Register, the Rx Data Ready
flag bit b6 of the Status Register is set to ‘1’ to prompt the µC to read the new data.
If the µC has not read the previous data from the Rx Data Register by the time that the CMX869 places
fresh data into it, the Rx Data Overflow flag bit, b5 of the Status Register, will be set to 1.
The Rx Data Ready flag and Rx Data Overflow bits are cleared to 0 when the Rx Data Register is read by
the µC.
© 2004 CML Microsystems Plc
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D/869/4
CMLMICRO [ CML MICROCIRCUITS ]
