ST25R3910 datasheet(53/65 Pages) STMICROELECTRONICS

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ST25R3910

1.3.22

Regulator Display Register

Address: 15h

Type: R

1.3.23

Regulated Voltage Definition Register

Address: 16h

Type: RW

Table 31. Regulators Display Register(1)

Bit

Name

Default

Function

Comments

reg_3

MSB

Displays actual regulated voltage when

regulator is operating.

In Power-down mode its content is forced to

00h.

See Table 33 for definition.

reg_2

reg_1

reg_0

LSB

Not used

1. At power-up and after Set Default command regulated voltage is set to 3.4 V (maximum value).

Table 32. Regulated Voltage Definition Register(1)

Bit

Name

Default

Function

Comments

reg_s

0: Regulated voltages are defined by

result of Adjust Regulators command

1: Regulated voltages are defined by

rege_x bits written in this register

Defines mode of regulator voltage setting.

rege_3

MSB

External definition of regulated voltage.

Refer to Table 33 for definition.

rege_2

rege_1

rege_0

LSB

Not used

1. Default setting takes place at power-up and after Set Default command.

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