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ST7DALIF2 Folha de dados(PDF) 161 Page - STMicroelectronics

Nome de Peças ST7DALIF2
Descrição Electrónicos  Configurable watchdog timer
PDF  171 Pages
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Fabricante Electrônico  STMICROELECTRONICS [STMicroelectronics]
Página de início  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

ST7DALIF2 Folha de dados(HTML) 161 Page - STMicroelectronics

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ST7DALIF2
Device configuration
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22
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
70
OPTION BYTE 1
70
Res.
OSCRANGE
2:0
SEC1 SEC0
FMP
R
FMP
W
PLL
x4x8
PLL
OFF
PLL32
OFF
OSC LVD1 LVD0
WDG
SW
WDG
HALT
Default
Value
1
1
1
1
1
1
0
011
1
0111
1
Table 95.
Oscillator source configuration
OSCRANGE
21
0
Typ.
frequency range with
Resonator
LP
1~2 MHz
0
0
0
MP
2~4 MHz
0
0
1
MS
4~8 MHz
0
1
0
HS
8~16 MHz
0
1
1
VLP
32.768 kHz
1
0
0
External
Clock source:
CLKIN
on OSC1
1
0
1
on PB4
1
1
1
Reserved
1
1
0



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