參數(shù)資料
型號(hào): ST72C171K2
廠商: 意法半導(dǎo)體
英文描述: 8-BIT MCU WITH 8K FLASH. ADC. WDG. SPI. SCI. TIMERS SPGAS (SOFTWARE PROGRAMMABLE GAIN AMPLIFIERS). OP-AMP
中文描述: 8位8K閃存微控制器。 ADC的。水分散粒劑。的SPI。脊髓損傷。定時(shí)器SPGAS(軟件可編程增益放大器)。運(yùn)放
文件頁(yè)數(shù): 147/152頁(yè)
文件大?。?/td> 1384K
代理商: ST72C171K2
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ST72C171
147/152
11 DEVICE CONFIGURATION AND
ORDERING INFORMATION
The device is available for production a user pro-
grammable version (FLASH). FLASH devices are
shipped to customers with a default content (FFh).
FLASH devices have to be configured by the cus-
tomer using the Option Bytes.
11.1 OPTION BYTES
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 ST7 program-
ming tool). The default content of the FLASH is
fixed to FFh.
In masked ROM devices, the option bytes are
fixed in hardware by the ROM code (see option
list).
USER OPTION BYTE 0
Bit 7:1 =
Reserved
, must always be 1.
Bit 1=
OA3E
Op-Amp 3 Enable
This option bit enables or disables the third Op-
Amp of the on-chip Op-Amp Module.
0: OE3 disabled
1: OE3 enabled
Bit 0 =
FMP
Full memory protection.
This option bit enables or disables external access
to the internal program memory (read-out protec-
tion). Clearing this bit causes the erasing (to 00h)
of the whole memory (including the option byte).
0: Program memory not read-out protected
1: Program memory read-out protected
USER OPTION BYTE 1
Bit 7 =
CFC
Clock filter control on/off
This option bit enables or disables the clock filter
(CF) features.
0: Clock filter enabled
1: Clock filter disabled
Bit 6:4 =
OSC[2:0]
Oscillator selection
These three option bits can be used to select the
main oscillator as shown in
Table 25
.
Bit 3:2 =
LVD[1:0]
Low voltage detection selection
These option bits enable the LVD block with a se-
lected threshold as shown in
Table 26
.
Bit 1 =
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
Bit 0 =
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)
Table 25. Main Oscillator Configuration
Table 26. LVD Threshold Configuration
Selected Oscillator
External Clock (Stand-by)
~4 MHz Internal RC
1~14 MHz External RC
Low Power Resonator (LP)
Medium Power Resonator (MP)
Medium Speed Resonator (MS)
High Speed Resonator (HS)
OSC2 OSC1 OSC0
1
1
1
1
1
0
0
1
0
1
0
0
0
0
1
0
X
1
0
1
0
Configuration
LVD1 LVD0
1
1
0
0
LVD Off
Highest Voltage Threshold (
4.50V)
Medium Voltage Threshold (
4.05V)
Lowest Voltage Threshold (
3.45V)
1
0
1
0
USER OPTION BYTE 0
7
0
USER OPTION BYTE 1
7
0
Reserved
OA3E FMP
CFC
OSC
2
OSC
1
OSC
0
LVD1 LVD0HALT
WDG
SW
Default
Value
1
1
1
1
1
1
1
0
1
1
1
0
1
1
1
1
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