Ch340 Datasheet (I) 1 usb to Serial Port Chip ch340
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CH340DS1 (1)
Document Outline
1.
Introduction
2. Features
3.
Packages
4. Pin definitions
5.
Function descriptions
5.1. Clock, reset, power, connect
5.2. Configuration information of CH340B
5.3. DTR and multi-mode MCU download
5.4.
UART features
6. Parameters
6.1.
Absolute maximum ratings
6.2. Electrical characteristics (5V)
6.3. Electrical characteristics (3.3V)
6.4. Timing parameters
7.
Applications
7.1. USB to 9-line RS232 UART
7.2. USB to 3-line RS232 UART
7.3. USB to RS232 UART, simplified version
7.4. USB to RS485 UART
7.5.
USB to Infrared adapter
7.6. Connect to MCU and supply power together
7.7. Connect to MCU
and supply power separately
, avoiding bi-directional
current poured backwards
7.8. Connect to MCU and supply power separately, avoiding inward current poured backwards
7.9. One-click USB download of MCU
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