ST7263B datasheet(32/132 Pages) STMICROELECTRONICS

Part #	ST7263B

Description	LOW SPEED USB 8-BIT MCU FAMILY WITH FLASH/ROM, UP TO 512 BYTES RAM, 8-BIT ADC, WDG, TIMER, SCI & I²C

PDF	132 Pages

Scroll/Zoom	100%

Manufacturer	STMICROELECTRONICS [STMicroelectronics]

Direct Link	http://www.st.com

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ST7263B

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10 MISCELLANEOUS REGISTER

Address: 0009h

—

Read/Write

Reset Value: 0000 0000 (00h)

Bit 7:3 = Reserved

Bit 2 = SMS

Slow Mode Select.

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 an internal divide-by-2 clock divider (refer to Fig-

ure 15 on page 19). The SMS bit has no effect on

the USB frequency.

0: Divide-by-2 disabled and CPU clock frequency

is standard

1: Divide-by-2 enabled and CPU clock frequency is

halved.

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)

---

SMS

USBOE

MCO

ST7263B Datasheet(PDF) 32 Page - STMicroelectronics