UPD77533 datasheet(37/104 Pages) RENESAS

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Data Sheet S15671EJ4V0DS

µµµµPD77533

7.3.2 Restoring from power save mode via command reception

The procedure for returning to normal mode from HALT mode via command reception is shown in Figure 7-5. The

µPD77533 shifts from HALT mode back to normal mode via WKUPB pin input control or by serial command

reception.

Figure 7-5. Restoring from Power Save Mode (HALT) (via Command Reception)

8. DEBUG FUNCTION

The debug function enables the following items to be checked via local commands.

For further details, see the explanation of each command.

Table 8-1. Debug Function

Item

Command

Function

SnapShot memory check

“SnapShot Memory Check”

(CMD-ID:0x2D)

Writes values such as 0x0000 and 0xFFFF to the entire

SnapShot memory area and checks whether these values

can be read correctly.

Serial communication

operation check

“Status Request” (CMD-ID:0x30)

Checks the operation of the

µPD77533.

The

µPD77533 simply sends a response to this command.

Signal processing status

reference

“Processing Status Request”

(CMD-ID:0x33)

References the signal processing status of the

µPD77533

(one of the following).

• Executing SnapShot

• Processing signal

• Idling

During positioning control, the

µPD77533 shifts to the

“executing SnapShot” or “processing signal” mode.

For the mode transition timing, see 5. POSITIONING

CONTROL.

Positioning progress

reference

“Rest Processing”

(CMD-ID:0x34)

References the number of satellites remaining to be

processed and the number of times positioning has been

executed.

µPD77533 version reference

“D77533 Software Version”

(CMD-ID:0x31)

References the version of the

µPD77533 software

(firmware).

PD77533

Host CPU

STNDBYB pin output

= 1 (standby released)

Any command

HALT

RUN

"Power Control"

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