ST7263 Datasheet, PDF (32/109 Pages) STMicroelectronics – LOW SPEED USB 8-BIT MCU FAMILY with up to 16K MEMORY, up to 512 BYTES RAM, 8-BIT ADC, WDG, TIMER, SCI & I2C

ST7263
5.2 MISCELLANEOUS REGISTER
Address: 0009h — Read/Write
Reset Value: 1111 0000 (F0h)
7
0
-
-
-
-
LVD CLKDIV USBOE MCO
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 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 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 (f_CPU on I/O
port)
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