IA186EB/IA188EB
Data Sheet
8-Bit/16-Bit Microcontrollers
July 10, 2011
Errata No. 2
Problem: When the extension byte (mod field) is set to ―11,‖ some instructions will cause the
CPU to hang.
Description: Although there are faster versions of each instruction (these are not commonly
used by compilers), the following instructions will cause the CPU to hang when the extension
byte (mod field) is set to ―11‖:
8D (LEA)
8F (POP memory)
C6 (MOV immediate8 to memory/register)
C7 (MOV immediate16 to memory/register)
FE (PUSH memory)
FF (PUSH memory)
Workaround: Substitute instructions in the following table.
Instruction
Workaround
Use MOV register (89 or 8B)
8D (LEA)
8F (POP memory)
Use POP register (0101_0xxx)
C6 (MOV immediate8 to memory/register)
Use MOV immediate8 to register (1011_0xxx)
C7 (MOV immediate16 to memory/register) Use MOV immediate16 to register (1011_1xxx)
FE (PUSH memory)
FF (PUSH memory)
Use PUSH register (0101_0xxx)
Use PUSH register (0101_0xxx)
Errata No. 3
Problem: When the chip is put in SFNM mode for INT0 or INT1, the LVL bit is automatically
set for those interrupts.
Workaround: None.
IA211080314-13
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