ST7DALIF2 datasheet(161/171 Pages) STMICROELECTRONICS

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ST7DALIF2

Device configuration

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Device configuration

Each device is available for production in user programmable versions (FLASH) as well as in

factory coded versions (FASTROM).

ST7FDALI devices are FLASH versions. ST7PDALI devices are Factory Advanced Service

Technique ROM (FASTROM) versions: they are factory programmed FLASH devices.

ST7FDALI devices are shipped to customers with a default program memory content (FFh),

while FASTROM factory coded parts contain the code supplied by the customer. This

implies that FLASH devices have to be configured by the customer using the Option Bytes

while the FASTROM devices are factory configured.

22.1

Option bytes

The two option bytes allow the hardware configuration of the microcontroller to be selected.

The option bytes can be accessed only in programming mode (for example using a standard

ST7 programming tool).

22.1.1

Option byte 0

OPT7 = Reserved, must always be 1.

OPT6:4 = OSCRANGE[2:0] Oscillator range

When the internal RC oscillator is not selected (Option OSC=1), these option bits select the

range of the resonator oscillator current source or the external clock source.

OPTION BYTE 0

OPTION BYTE 1

Res.

OSCRANGE

2:0

SEC1 SEC0

FMP

PLL

x4x8

PLL

OFF

PLL32

OFF

OSC LVD1 LVD0

WDG

HALT

Default

Value

011

0111

Table 95.

Oscillator source configuration

OSCRANGE

Typ.

frequency range with

Resonator

1~2 MHz

2~4 MHz

4~8 MHz

8~16 MHz

VLP

32.768 kHz

External

Clock source:

CLKIN

on OSC1

on PB4

Reserved

ST7DALIF2 Datasheet(PDF) 161 Page - STMicroelectronics

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