IA186EB/IA188EB
Data Sheet
8-Bit/16-Bit Microcontrollers
July 10, 2011
Errata No. 12
Problem:
Illegal serial port modes do not match OEM part.
Description: If the mode bits of the serial control register (S1CON, S0CON) are set to an
illegal encoding (0x5, 0x6, or 0x7), the Innovasic part acts as though it were in mode 4. The
OEM part acts as if it were in mode 1.
Workaround: Use a valid encoding for serial mode.
Errata No. 13
Problem:
Non-maskable interrupt (NMI) can be pre-empted by maskable interrupt.
Description: When instruction execution unit is in Decode state for 2 or more consecutive
cycles and an NMI is recognized, it could be pre-empted by a maskable interrupt.
Workaround: None.
Errata No. 14
Problem:
Ready signal may not be recognized in bus cycles with zero wait states.
Description: When a chip select is set to use the ready signal to extend a bus cycle that
normally has no wait states (Start register bits 3-0 == 0000), the ready signal may not be
recognized in time to extend the bus cycle.
Workaround: Set wait states to 1 or more if using ready to extend bus cycles.
IA211080314-13
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