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ST72340 bảng dữ liệu(PDF) 67 Page - STMicroelectronics

tên linh kiện ST72340
Giải thích chi tiết về linh kiện  8-BIT MCU WITH UP TO 16K FLASH MEMORY, 10-BIT ADC, TWO 16-BIT TIMERS, TWO I2C, SPI, SCI
PDF  191 Pages
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nhà sản xuất  STMICROELECTRONICS [STMicroelectronics]
Trang chủ  http://www.st.com
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ST72340 bảng dữ liệu(HTML) 67 Page - STMicroelectronics

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MAIN CLOCK CONTROLLER WITH REAL TIME CLOCK (Cont’d)
Bit 0 = OIF Oscillator interrupt flag
This bit is set by hardware and cleared by software
reading the MCCSR register. It indicates when set
that the main oscillator has reached the selected
elapsed time (TB1:0).
0: Timeout not reached
1: Timeout reached
CAUTION: The BRES and BSET instructions
must not be used on the MCCSR register to avoid
unintentionally clearing the OIF bit.
MCC BEEP CONTROL REGISTER (MCCBCR)
Read/Write
Reset Value: 0000 0000 (00h)
Bits 7:2 = Reserved, must be kept cleared.
Bits 1:0 = 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.
Table 16. Main Clock Controller Register Map and Reset Values
70
00
00
0
0
BC1
BC0
BC1
BC0
Beep mode with fOSC2=8MHz
00
Off
01
~2-KHz
Output
Beep signal
~50% duty cycle
10
~1-KHz
1
1
~500-Hz
Address
(Hex.)
Register
Label
76543
210
002Bh
SICSR
Reset Value
0
AVDIE
0
AVDF
0
LVDRF
x
LOCKED
00
0
WDGRF
x
002Ch
MCCSR
Reset Value
MCO
0
CP1
0
CP0
0
SMS
0
TB1
0
TB0
0
OIE
0
OIF
0
002Dh
MCCBCR
Reset Value
00000
0
BC1
0
BC0
0



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