Rainbow Electronics T89C51RC2 - Manual (Page 3)

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T89C51RB2/RC2
Rev. A – 31-May-01
T10 SPI interface - Spi SS pin Limitation on Master/Slave
Description The SS pin of the Spi was not got back as an I/O when a One-to-One Master/Slave
intercommunication is performed.
Workaround No
T11 Movc instruction on boot memory from boot memory does’nt work
Description No movc instruction is performed when a program running on the boot memory try to
read is own code by the movc instruction
Workaround No
T12 Power On Flag
Description Power On Flag doesn’t work.
Workaround No
T13
SPI - Spi Slave Responding in a Multislave configuration when not selected by
the Master and its SPDAT register loaded
Description In a multislave configuration, if the master is sending the Sck and the Tx data to all
the slaves, and only one slave is selected, the non-selected slaves respond and
generate the end of the transmission interruption (SPIF) if their SPDAT registers are
loaded before the transmission.
Workaround No
T14 SPI - Spi Slave not responding when selected and not loaded
Description SPI Slave not responding when selected by a Master and no Data is loaded to be
transmitted. No Rx data is registered and no SPIF interruption is generated at the
end of the Trans
Workaround No