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ST72631 Scheda tecnica(PDF) 32 Page - STMicroelectronics

Il numero della parte ST72631
Spiegazioni elettronici  LOW SPEED USB 8-BIT MCU FAMILY with up to 16K MEMORY, up to 512 BYTES RAM, 8-BIT ADC, WDG, TIMER, SCI & I2C
PDF  109 Pages
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Produttore elettronici  STMICROELECTRONICS [STMicroelectronics]
Homepage  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

ST72631 Scheda tecnica(HTML) 32 Page - STMicroelectronics

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5.2 MISCELLANEOUS REGISTER
Address: 0009h
—
Read/Write
Reset Value: 1111 0000 (F0h)
Bit 7:4 = Reserved
Bit 3 = LVD
Low Voltage Detector.
This bit is set by software and only cleared by hard-
ware after a reset.
0: LVD enabled
1: LVD disabled
Bit 2 = CLKDIV
Clock Divider.
This bit is set by software and only cleared by hard-
ware after a reset. If this bit is set, it enables the use
of a 12 MHz external oscillator (refer to Figure 10
on page 17).
0: 24 MHz external oscillator
1: 12 MHz external oscillator.
Bit 1 = USBOE
USB enable.
If this bit is set, the port PC2 outputs the USB out-
put enable signal (at “1” when the ST7 USB is
transmitting data).
Unused bits 7-4 are set.
Bit 0 = MCO
Main Clock Out selection
This bit enables the MCO alternate function on the
PA0 I/O port. It is set and cleared by software.
0: MCO alternate function disabled (I/O pin free for
general-purpose I/O)
1: MCO alternate function enabled (fCPU on I/O
port)
70
--
--
LVD
CLKDIV USBOE
MCO



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