Datasheet CH9121 (Nanjing Qinheng Microelectronics) - 2
| Hersteller | Nanjing Qinheng Microelectronics |
| Beschreibung | Network serial port transparent transmission chip |
| Seiten / Seite | 15 / 2 — 3. Pinouts |
| Revision | V2.5 |
| Dateiformat / Größe | PDF / 283 Kb |
| Dokumentensprache | Englisch |
3. Pinouts
Modelllinie für dieses Datenblatt
Textversion des Dokuments
CH9121 Datasheet https://wch-ic.com Support setting chip working mode, port, IP and other network parameters through host computer software and serial port commands The serial port supports full-duplex and half-duplex serial communication, and supports RS485 automatic switching of transmitting and receiving Provide LED status display Link and ACT. Provide computer-side virtual serial port software Support KEEPALIVE mechanism TSSOP20 and LQFP64M lead-free packages are available.
3. Pinouts
48 47 46 45 44 43 42 41 40 39 38 37 36 35 34 33 2 I C C D K C D C C D C C IO IO S2 N N W N D N N N N N ST N N C C C O G C D G G R C P N V V V C 49 T NC C T FGEN 32 50 NC RUN 31 51 30 TNOW 1 TCPCS1 52 29 ACT VCCIO 53 LINK VDDK 28 54 NC NC 27 55 26 RXD2 NC 1 20 56 25 TXP RXN TXD2 NC 2 19 57 TXN RXP RXD1 NC 24 3 58 23 VDDK VCC33 18 TXD1 NC 4 59 22 XI GND 17 RESET NC 5 16 60 21 RTS/TNOW1 CFG VCCIO 6 XO 15 61 LINK/RESET CTS NC GND 20 7 62 19 ACT TXD1 14 NC VDDK 8 63 18 VCCIO RXD1 13 VCCIO GND 9 12 64 17 TNOW2 NC NC 10 TXD2 11 RXD2 CFG 33 33 C D P N P N D C D C C N X X C X X N I O C N C C C N V G R R N T T G X X V G N N N 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 CH9121T CH9121A Table 3-1 Package Description Package Form Body Size Pin Pitch Package Description Order Model TSSOP20 4.4*6.5mm 0.65mm 25.6mil Thin Shrink Small Outline Package CH9121T LQFP64M 10*10mm 0.5mm 19.7mil Low-profile Quad Flat Package CH9121A Note: 1. For new designs, it is recommended to use CH9121T, which supports hardware flow control, has a smaller package, and has a more streamlined peripheral circuit. 2. CH9121A is upgraded based on the previous version CH9121 (without suffix letters), and the pins are basically compatible. The peripheral circuit needs to be adjusted when replacing. 3. The previous version CH9121 (without suffix letters) is still available but is not recommended for new designs. V2.5 2 Document Outline 1. Overview 2. Features 3. Pinouts 4. Pin Definitions 5. Function Parameter Descriptions 5.1 Overview 5.2 Basic Parameters 5.3 Port Parameter 5.4 Default Configuration 6. Function Descriptions 6.1 UART 6.1.1 Serial Baud Rate 6.2 Other Hardware 7. Parameters 7.1 Absolute Maximum Value 7.2 Electrical Parameters 7.3 Power Consumption 7.4 AC Electrical Characteristics and Timing 8. Package Information 8.1 TSSOP20 8.2 LQFP64M 9. Applications 9.1 CH9121T Reference Circuit 9.2 CH9121A Reference Circuit
3. Pinouts
48 47 46 45 44 43 42 41 40 39 38 37 36 35 34 33 2 I C C D K C D C C D C C IO IO S2 N N W N D N N N N N ST N N C C C O G C D G G R C P N V V V C 49 T NC C T FGEN 32 50 NC RUN 31 51 30 TNOW 1 TCPCS1 52 29 ACT VCCIO 53 LINK VDDK 28 54 NC NC 27 55 26 RXD2 NC 1 20 56 25 TXP RXN TXD2 NC 2 19 57 TXN RXP RXD1 NC 24 3 58 23 VDDK VCC33 18 TXD1 NC 4 59 22 XI GND 17 RESET NC 5 16 60 21 RTS/TNOW1 CFG VCCIO 6 XO 15 61 LINK/RESET CTS NC GND 20 7 62 19 ACT TXD1 14 NC VDDK 8 63 18 VCCIO RXD1 13 VCCIO GND 9 12 64 17 TNOW2 NC NC 10 TXD2 11 RXD2 CFG 33 33 C D P N P N D C D C C N X X C X X N I O C N C C C N V G R R N T T G X X V G N N N 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 CH9121T CH9121A Table 3-1 Package Description Package Form Body Size Pin Pitch Package Description Order Model TSSOP20 4.4*6.5mm 0.65mm 25.6mil Thin Shrink Small Outline Package CH9121T LQFP64M 10*10mm 0.5mm 19.7mil Low-profile Quad Flat Package CH9121A Note: 1. For new designs, it is recommended to use CH9121T, which supports hardware flow control, has a smaller package, and has a more streamlined peripheral circuit. 2. CH9121A is upgraded based on the previous version CH9121 (without suffix letters), and the pins are basically compatible. The peripheral circuit needs to be adjusted when replacing. 3. The previous version CH9121 (without suffix letters) is still available but is not recommended for new designs. V2.5 2 Document Outline 1. Overview 2. Features 3. Pinouts 4. Pin Definitions 5. Function Parameter Descriptions 5.1 Overview 5.2 Basic Parameters 5.3 Port Parameter 5.4 Default Configuration 6. Function Descriptions 6.1 UART 6.1.1 Serial Baud Rate 6.2 Other Hardware 7. Parameters 7.1 Absolute Maximum Value 7.2 Electrical Parameters 7.3 Power Consumption 7.4 AC Electrical Characteristics and Timing 8. Package Information 8.1 TSSOP20 8.2 LQFP64M 9. Applications 9.1 CH9121T Reference Circuit 9.2 CH9121A Reference Circuit