IA186EB Datasheet, PDF (81/85 Pages) InnovASIC, Inc – 8-Bit/16-Bit Microcontrollers

IA186EB/IA188EB
8-Bit/16-Bit Microcontrollers
Data Sheet
July 10, 2011
Errata No. 8
Problem: Pin LOCK_n does not have an internal pullup.
Description: Because Pin LOCK_n does not have an internal pullup, it will float during reset
and bus hold.
Workaround: An external pullup may be necessary if there is high external load on the signal.
Errata No. 9
Problem:
The Relocation Register (RELREG, PCB offset 0xA8) can only be modified by an 8-bit write.
Description: The Relocation Register (RELREG, PCB offset 0xA8) can only be modified by an
8-bit write. A 16-bit write will have no effect. The 186 EB is unaffected.
Workaround: Use an 8-bit access to affect the RELREG register.
Errata No. 10
Problem:
When the timer compare register for any of the timers is set to x0000, the max count is xFFFF
instead of x10000 as in the OEM part.
Description: The timer output will change one count earlier than it should when the max count
is set to x0000.
Workaround: The workaround is application dependent. Please contact Innovasic Technical
Support if this erratum is an issue.
Errata No. 11
Problem:
NMI cannot bring chip out of powerdown mode.
Description: Only a reset brings the part out of powerdown after a HLT instruction is executed
with the PWRDN bit set in the PWRCON register.
Workaround: Use IDLE instead of PWRDN.
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