ST72734 datasheet(14/144 Pages) STMICROELECTRONICS

部件名	ST72734

功能描述	8-BIT USB MCU FOR MONITORS, WITH UP TO 60K OTP, 1K RAM, ADC, TIMER, SYNC, TMU, PWM/BRM, H/W DDC & I2C

PDF	144 Pages

Scroll/Zoom	100%

制造商	STMICROELECTRONICS [STMicroelectronics]

网页	http://www.st.com

标志

14 / 144 page

ST72774/ST727754/ST72734

14/144

1.4 External connections

The following figure shows the recommended ex-

ternal connections for the device.

The VPP pin is only used for programming OTP

and EPROM devices and must be tied to ground in

user mode.

The 10 nF and 0.1 µF decoupling capacitors on

the power supply lines are a suggested EMC per-

formance/cost tradeoff.

The external reset network (including the manda-

tory 1K serial resistor) is intended to protect the

device against parasitic resets, especially in noisy

environments.

Unused I/Os should be tied high to avoid any un-

necessary power consumption on floating lines.

An alternative solution is to program the unused

ports as inputs with pull-up.

Figure 4. Recommended External Connections

VPP

VDD

VSS

OSCIN

OSCOUT

RESET

VDD

0.1µF

See

Clocks

Section

VDD

0.1µF

EXTERNAL RESET CIRCUIT

Or configure unused I/O ports

Unused I/O

10nF

4.7K

10K

by software as input with pull-up

VDD

ST72734 数据表(PDF) 14 Page - STMicroelectronics

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