Rainbow Electronics T89C51RC2 - Manual (Page 2)

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T89C51RB2/RC2
Rev. A – 31-May-01
T04 Bootloader - Write Page API - V1.1
Description The Write Page API does not work correctly with the full page size.
Workaround Write by 32 bytes size page instead of 128 bytes.
T05 Bootloader - Read Philips compatibility - V1.1.
Description The previous version added FF bytes after the last address to complete the last 16
bytes line.
Workaround Ignore the returned data above the end address of the Read command.
T06 Bootloader - SBV and BSB protection - V1.1
Description SBV and BSB are not protected with SSB.
Workaround No
T07 Bootloader - Program Byte API - V1.1
Description No returned value Acc=00h if programming OK.
Workaround No
T08 Bootloader - Write SSB level 0 - V1.1
Description The command "Write SSB level0" is allowed in level 1 security. So the device can be
unprotected.
Workaround No
T09 SPI interface - Transmission on Master Mode
Description A 9th bit is transmitted by the interface when the clock rate is set on divide by 2
mode and a positive polarity is selected ; the SPR2, SPR1, SPR0 bits are cleared
(000) and CPOL = 1 on the SPCON register.
Workaround Set the clock rate divide by 4 and X2 mode.