EMC EM78612 User Manual download pdf (Page 29)

EM78612

Universal Serial Bus Microcontroller

Product Specification (V1.0) 03.22.2006 •

••

• 27

(This specification is subject to change without further notice)

status flags must 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”.

FReturn 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

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EMC EM78612 User Manual Page 29