CXD2931R Просмотр технического описания (PDF) - Sony Semiconductor

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CXD2931R

1 chip GPS LSI

Sony Semiconductor 

CXD2931R

CXD2931R Initialization

CXD2931R initialization is started by setting the reset input signal EXRS (Pin 27) to low level. The timing

should satisfy the conditions noted below.

1. During power-on (power-on reset) (VDD = 3.0 to 3.6V, Topr = –40 to +85°C)

VDD

VDD [V]

Power supply,

PWRST

(Pin 28)

100ms or more

EXRS (Pin 27)

VDD/2

GND

The PWRST (Pin 28) signal should rise simultaneously with the power supply. The EXRS (Pin 27) signal

should rise 100ms or more after the power supply and the PWRST signal have risen. Note that the PWRST

signal should be left open during battery backup.

2. Initialization during operation (VDD = 3.0 to 3.6V, Topr = –40 to +85°C)

Power supply,

PWRST

(Pin 28)

VDD

VDD [V]

100µs or more

EXRS (Pin 27)

VDD/2

GND

The internal registers can be initialized during operation by setting the EXRS (Pin 27) signal to low level for

100µs or more.

Keep the PWRST (Pin 28) signal at high level at this time.

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