Multi-Tech Systems 92U10E06831 ユーザーズマニュアル

Part 1 

− Universal Socket Connectivity 

Chapter 1 – Universal Socket Connectivity 

Multi-Tech Systems, Inc. Universal Socket Hardware Guide for Developers (S000342M) 

19 

 

Mutes the speaker. Default positions are 1 and 2 (speaker is not muted). 

Ties the TX and RX clock lines together. Default positions are 1 and 2 (transmit and receive 
clock act independently). 

Sets the data rate. NORMAL sets the data rate at 250kbps.  
H.S. (high speed serial communications) sets the data rate at 1Mbps. 

Testing interface (debugging) for the RS-232 signals. 

JP5 acts as a replacement for pin 45 when pin 45 is used for another function. 

Testing interface (debugging) for the serial TTL signals. 

JP9 is the 5V / 3.3V regulator. The factory default operating voltage is 3.3V.  
Warning – Be sure that the 5V / 3.3V jumper is set to match the requirements of your 
SocketModem. If this jumper is set incorrectly, damage to the SocketModem and/or the 
Test/Demo card could result. 
Caution – Use only the provided Multi-Tech Systems, Inc. transformer with the Test/Demo 
board. Use of any other power source will void the warranty and will likely damage the 
Test/Demo board and the SocketModem. The transformer connector is keyed to prevent 
improper connection to the Test/Demo board.  

JP12 allows you to select either the internal 5V regulator (INT 5V) or to choose EXT 5V. For 
the EXT 5V, you can use your own external 5V power source and plug it into J7. 

Set either 5V or 3.3V for USB_VBUS line (supplied by the VCC of the USB jack). 

Internal testing. 

JP15 disconnects pin 45 from SLP with JP5 (the RS-232 driver sleep mode).  

JTAG header. 

Mosquito header. If used to debug the SocketModem while using the USB port, then the JP14 
would have to be removed to disconnect USB_VBUS. 

Power feed for area where SocketModems are placed (J24). 

Debugging probes. 

Ground lug. 

Set the switch block to the product being used.  

Reset 

 

10   PWR 
 8    CTS 
 6    DSR 
 4    DTR 
 2    RXD 

9    RI 
7    RTS 
5    GND 
3    TXD 
1    DCD 

 

 2    RXC 

1    TXC 

 

TX Term 

RX Term 

 
 

 

Preliminary  

Confidential