ST7LITE3 datasheet(159/167 Pages) STMICROELECTRONICS

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ST7LITE3

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OPTION BYTES (Cont’d)

OPTION BYTE 1

OPT 7 = PLLx4x8 PLL Factor Selection.

0: PLLx4

1: PLLx8

OPT 6 = PLLOFF PLL Disable

This option bit enables or disables the PLL.

0: PLL enabled

1: PLL disabled (bypassed)

OPT 5 = Reserved. Must always be set to 1.

OPT 4 = OSC RC Oscillator Selection

This option bit enables to select the internal RC

Oscillator.

0: RC Oscillator on

1: RC Oscillator off

OPT 3:2 = LVD[1:0] Low Voltage Selection

These option bits enable the voltage detection

block (LVD and AVD) with a selected threshold to

the LVD and AVD.

OPT 1 = WDGSW Hardware or Software Watch-

dog

0: Hardware (watchdog always enabled)

1: Software (watchdog to be enabled by software)

OPT 0 = WDG HALT Watchdog Reset on Halt

0: No reset generation when entering HALT mode

1: Reset generation when entering HALT mode

OPTION BYTE 0

OPTION BYTE 1

AWU

OSCRANGE

2:0

SEC1 SEC0 FMPR FMPW

PLL

x4x8

PLL

OFF

Res. OSC

LVD

1:0

WDG

HALT

Default

Value

Configuration

VD1

VD0

LVD Off

Highest Voltage Threshold

Medium Voltage Threshold

Lowest Voltage Threshold

ST7LITE3 数据表(PDF) 159 Page - STMicroelectronics

ST7LITE3 数据表(HTML) 159 Page - STMicroelectronics

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