ST7MC1K2-Auto datasheet(356/371 Pages) STMICROELECTRONICS

356 / 371 page

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ST7MCxxx-Auto device configuration and ordering information ST7MC1K2-Auto, ST7MC1K6-Au-

356/371

ST7MCxxx-Auto device configuration and ordering

information

Each device is available for production in ROM versions and in user programmable versions (Flash) as

well as in factory coded versions (FASTROM). ST7MC1K2-Auto and ST7MC2S4-Auto are ROM devices.

ST7PMC1K2-Auto, ST7PMC2S4-Auto, ST7PMC1K6-Auto, and ST7PMC2S6-Auto devices are factory

advanced service technique ROM (FASTROM) versions: They are programmed Flash devices.

ST7FMC1K2-Auto, ST7FMC1K6-Auto, ST7FMC2S4-Auto, and ST7FMC2S6-Auto Flash devices are

shipped to customers with a default content (FFh), while ROM/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 ROM devices are factory-configured.

14.1

Flash option bytes

The option bytes allow the hardware configuration of the microcontroller to be selected. They have no

address in the memory map and can be accessed only in programming mode (for example using a

standard ST7 programming tool). The default content of the Flash is fixed to FFh. This means that all the

options have ‘1’ as their default value.

Table 226.

Flash option bytes

Static option byte 0

Static option byte 1

321

654

WDG

DIV2

PKG

Reserved

MCO

Default

value

111

Table 227.

Option byte 0

Bit

Name

Function

OPT7

WDG HALT

Watchdog and Halt mode

This option bit determines if a reset is generated when entering Halt mode while the

Watchdog is active.

0: No reset generation when entering Halt mode

1: Reset generation when entering Halt mode

OPT6

WDG SW

Hardware or software watchdog

This option bit selects the watchdog type.

0: Hardware (watchdog always enabled)

1: Software (watchdog to be enabled by software)

OPT5

CKSEL

Clock source selection.

0: PLL clock selected(1)

1: Oscillator clock selected

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