EM78612
Universal Serial Bus Microcontroller
Product Specification (V1.0)03.2 2.2006 •
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(This specification is subject to change without further notice)
status flags m ust be cleared by firmware before leaving the interrupt service routine
and enabling interrupt.
The global interrupt is enabled by the ENI (RETI) instruction and is disabled by the DISI
instruction.
Interrupt flag. If a bit of RF is asserted, it means the relative interrupt
requested.
The priority of USB, TCC interrupt is USB > TCC.
The additional hardware process step of the interrupt occurred
including
A
Disable interrupt means reserving next time interrupt
process until the instruction “RETI” executed.
B
Jump to interrupt vector.
C
Push “Accumulator”, “R3” and “R4”. Steps “A”, “B”, and “C”
are executed at the same time.
D
Clear “R3”and“R4”.
E
If the instruction “RETI” is executed, pop “Accumulator”,
“R3” and “R4”.
FReturn to main program and enable interrupt. Step “E” and “F” are
executed at the same time.
8 Absolute Maximum Ratings
Symbol Min Max Unit
Temperature under bias 0 70 ºC
Storage temperature -65 150 ºC
Input voltage -0.5 6.0 V
Output voltage -0.5 6.0 V