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Renesas g1a Answering Machine User Manual

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RL78/G1A CHAPTER 19 RESET FUNCTION

The status of the RESF register when a reset request is generated is shown in Table 19-3.

Table 19-3. RESF Register Status When Reset Request Is Generated

Reset Source

Flag

RESET Input

Reset by

POR

Reset by

Execution of

Illegal

Instruction

Reset by

WDT

Reset by

RAM Parity

Error

Reset by

Illegal-

memory

Access

Reset by

LVD

TRAP bit Set (1) Held

WDTRF bit Held Set (1) Held

RPERF bit Held Set (1) Held

IAWRF bit Held Set (1) Held

LVIRF bit

Cleared (0)

Held Set (1)

<R>

The RESF register is automatically cleared when it is read by an 8-bit memory manipulation instruction. Figure 19-5

shows the procedure for checking a reset source.

R01UH0305EJ0200 Rev.2.00 747

Jul 04, 2013

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