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ST72334J Scheda tecnica(PDF) 49 Page - STMicroelectronics

Il numero della parte ST72334J
Spiegazioni elettronici  8-BIT MCU WITH SINGLE VOLTAGE FLASH MEMORY, ADC, 16-BIT TIMERS, SPI, SCI INTERFACES
PDF  125 Pages
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Produttore elettronici  STMICROELECTRONICS [STMicroelectronics]
Homepage  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

ST72334J Scheda tecnica(HTML) 49 Page - STMicroelectronics

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ST72334J/N, ST72314J/N, ST72124J
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MISCELLANEOUS REGISTERS (Cont’d)
MISCELLANEOUS REGISTER 2 (MISCR2)
Read/Write
Reset Value: 0000 0000 (00h)
Bit 7:6 = Reserved
Must always be cleared
Bit 5:4 = BC[1:0]
Beep control
These 2 bits select the PF1 pin beep capability.
The beep output signal is available in ACTIVE-
HALT mode but has to be disabled to reduce the
consumption.
Bit 3:2 = Reserved
Must always be cleared
Bit 1 = SSM
SS mode selection
It is set and cleared by software.
0: Normal mode - SS uses information coming
from the SS pin of the SPI.
1: I/O mode, the SPI uses the information stored
into bit SSI.
Bit 0 = SSI
SS internal mode
This bit replaces pin SS of the SPI when bit SSM is
set to 1. (see SPI description). It is set and cleared
by software.
Table 11. Miscellaneous Register Map and Reset Values
70
-
-
BC1
BC0
-
-
SSM
SSI
BC1 BC0
Beep mode with fOSC=16MHz
0
0
Off
0
1
~2-KHz
Output
Beep signal
~50% duty cycle
1
0
~1-KHz
1
1
~500-Hz
Address
(Hex.)
Register
Label
765
4
321
0
0020h
MISCR1
Reset Value
IS11
0
IS10
0
MCO
0
IS21
0
IS20
0
CP1
0
CP0
0
SMS
0
0040h
MISCR2
Reset Value
0
0
BC1
0
BC0
00
0
SSM
0
SSI
0



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