ST7PSCR1E4M1/XXX View Datasheet(PDF) - STMicroelectronics

Part Name

Description

Manufacturer

ST7PSCR1E4M1/XXX

8-BIT LOW-POWER, FULL-SPEED USB MCU WITH 16K FLASH, 768 RAM, SMARTCARD I/F, TIMER

STMicroelectronics 

ST7SCR

16 DEVICE CONFIGURATION AND ORDERING INFORMATION

Each device is available for production in ROM

versions and in user programmable versions (High

Density FLASH).

FLASH devices are shipped to customers with a

default content (FFh).

This implies that FLASH devices have to be con-

figured by the customer using the Option Byte

while the ROM devices are factory-configured.

16.0.1 Option Bytes

The 8 option bits from the flash are programmed

through the static option byte SOB1. The descrip-

tion of each of these 8 bits is given below.

Static option Byte (SOB1)

OPT4 = NEST Interrupt Controller

This bit enables the nested Interrupt Controller.

0: Nested interrupt controller disabled

1: Nested interrupt controller enabled

OPT3 = ISOCLK Clock source selection

0: Card clock is generated by the divider (48MHz/

12 = 4MHz).

1: Card clock is generated by the oscillator.

OPT2 = RETRY Number of Retries for UART ISO

0: In case of an erroneous transfer, character is

transmitted 4 times.

1: In case of an erroneous transfer, character is

transmitted 5 times.

OPT

7

6

OPT

5

4

3

2

1

0

OPT1 = Reserved, must be kept at 1.

--

--

WDG-

SW

NEST ISOCLK RETRY

- FMP_R

OPT7:6 = Reserved

OPT5= WDGSW Hardware or software watchdog

This option bit selects the watchdog type.

0: Hardware (watchdog always activated)

1: Software (watchdog to be activated by software)

OPT0 = FMP_R Flash memory read-out protec-

tion

This option indicates if the user flash memory is

protected against read-out piracy. This protection

is based on read and a write protection of the

memory in test modes and ICP mode. Erasing the

option bytes when the FMP_R option is selected

induce the whole user memory erasing first.

0 : read-out protection enabled

1 : read-out protection disabled

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