LQFP64 datasheet(29/90 Pages) STMICROELECTRONICS

29 / 90 page

SPC560D30x, SPC56040Dx

Electrical characteristics

Doc ID 16315 Rev 7

29/90

4.3

NVUSRO register

Bit values in the Non-Volatile User Options (NVUSRO) Register control portions of the

device configuration, namely electrical parameters such as high voltage supply and

oscillator margin, as well as digital functionality (watchdog enable/disable after reset).

For a detailed description of the NVUSRO register, please refer to the device reference

manual.

4.3.1

NVUSRO[PAD3V5V] field description

The DC electrical characteristics are dependent on the PAD3V5V bit value. Table 8 shows

how NVUSRO[PAD3V5V] controls the device configuration.

4.3.2

NVUSRO[OSCILLATOR_MARGIN] field description

The fast external crystal oscillator consumption is dependent on the

OSCILLATOR_MARGIN bit value. Table 9 shows how NVUSRO[OSCILLATOR_MARGIN]

controls the device configuration.

4.3.3

NVUSRO[WATCHDOG_EN] field description

The watchdog enable/disable configuration after reset is dependent on the

WATCHDOG_EN bit value. Table 9 shows how NVUSRO[WATCHDOG_EN] controls the

device configuration.

Table 8.

PAD3V5V field description

Value(1)

Default manufacturing value is ‘1’. Value can be programmed by customer in Shadow Flash.

Description

High voltage supply is 5.0 V

High voltage supply is 3.3 V

Table 9.

OSCILLATOR_MARGIN field description

Value(1)

Default manufacturing value is ‘1’. Value can be programmed by customer in Shadow Flash.

Description

Low consumption configuration (4 MHz/8 MHz)

High margin configuration (4 MHz/16 MHz)

Table 10.

WATCHDOG_EN field description

Value(1)

Default manufacturing value is ‘1’. Value can be programmed by customer in Shadow Flash.

Description

Disable after reset

Enable after reset

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