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ST6203BT6 View Datasheet(PDF) - STMicroelectronics

Part NameDescriptionManufacturer
ST6203BT6 8-bit MCUs with A/D converter,two timers, oscillator safeguard & safe reset ST-Microelectronics
STMicroelectronics ST-Microelectronics
ST6203BT6 Datasheet PDF : 100 Pages
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ST6200C ST6201C ST6203C
3.3 OPTION BYTES
Each device is available for production in user pro-
grammable versions (OTP) as well as in factory
coded versions (ROM). OTP devices are shipped
to customers with a default content (00h), while
ROM factory coded parts contain the code sup-
plied by the customer. This implies that OTP de-
vices have to be configured by the customer using
the Option Bytes while the ROM devices are facto-
ry-configured.
The two option bytes allow the hardware configu-
ration of the microcontroller to be selected.
The option bytes have no address in the memory
map and can be accessed only in programming
mode (for example using a standard ST6 program-
ming tool).
In masked ROM devices, the option bytes are
fixed in hardware by the ROM code (see Section
11.6.2 "ROM VERSION" on page 93). It is there-
fore impossible to read the option bytes.
The option bytes can be only programmed once. It
is not possible to change the selected options after
they have been programmed.
In order to reach the power consumption value in-
dicated in Section 10.4, the option byte must be
programmed to its default value. Otherwise, an
over-consumption will occur.
0: Low Voltage Detector disabled
1: Low Voltage Detector enabled.
LSB OPTION BYTE
Bit 7 = PROTECT Readout Protection.
This option bit enables or disables external access
to the internal program memory.
0: Program memory not read-out protected
1: Program memory read-out protected
Bit 6 = OSC Oscillator selection.
This option bit selects the main oscillator type.
0: Quartz crystal, ceramic resonator or external
clock
1: RC network
Bit 5 = Reserved, must be always cleared.
Bit 4 = Reserved, must be always set.
Bit 3 = NMI PULL NMI Pull-Up on/off.
This option bit enables or disables the internal pull-
up on the NMI pin.
0: Pull-up disabled
1: Pull-up enabled
MSB OPTION BYTE
Bits 15:11 = Reserved, must be always cleared.
Bit 10 = Reserved, must be always set.
Bit 9 = EXTCNTL External STOP MODE control.
0: EXTCNTL mode not available. STOP mode is
not available with the watchdog active.
1: EXTCNTL mode available. STOP mode is avail-
able with the watchdog active by setting NMI pin
to one.
Bit 8 = LVD Low Voltage Detector on/off.
This option bit enable or disable the Low Voltage
Detector (LVD) feature.
Bit 2 = Reserved, must be always set.
Bit 1 = WDACT Hardware or software watchdog.
This option bit selects the watchdog type.
0: Software (watchdog to be enabled by software)
1: Hardware (watchdog always enabled)
Bit 0 = OSGEN Oscillator Safeguard on/off.
This option bit enables or disables the oscillator
Safeguard (OSG) feature.
0: Oscillator Safeguard disabled
1: Oscillator Safeguard enabled
MSB OPTION BYTE
15
87
LSB OPTION BYTE
0
Reserved
EXT
CTL
LVD
PRO-
TECT
OSC
Res.
Res.
NMI
PULL
Res.
WD OSG
ACT EN
Default
Value
X
X
X
X
X
X
X
X
X
X
X
X
X
X
XX
Doc ID 4563 Rev 5
15/100
1
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