SCD240110QCM Intel, SCD240110QCM Datasheet - Page 72

• Manufacturer Part Number: SCD240110QCM
• Manufacturer: Intel

Specifications of SCD240110QCM

• Operating Supply Voltage (max): 7V
• Operating Temp Range: 0C to 70C
• Operating Temperature Classification: Commercial
• Mounting: Surface Mount
• Pin Count: 100
• Lead Free Status / Rohs Status: Not Compliant

CD2401 — Multi-Protocol Communications Controller
6.2.4
72
Table 12. Recommended Signal Connection
For example, if the CD2401 is designed to be DCE and automatic out-of-band flow control is
desired, connect the DTR pin to the remote CTS input. If the CD2401 is to be used as the DTE
side, then connect the CD2401 CTS output to the remote CTS input.
Note that if automatic out-of-band flow control is implemented, the activity of the DTR and DSR
pins do not implement the function assigned to those signal names by the signaling conventions of
the CCITT and other standards organizations. These names would only apply to these pins if they
are under program control and not under automatic CD2401 control. In fact, the ‘DTR’ function
enables the modem to go on- and off-line, depending on the state of the pin. If automatic control is
used, then DTR goes inactive when the receive FIFO reached the programmed threshold, thus
causing the modem to drop the connection (carrier) to the remote, which would not be the correct
function based on the state of the receive FIFO.
Line Break Detection and Generation
A line break on the receiver occurs when the input at the RXD (receive data) pin is all zeros (low)
for at least one full character time. This is indicated when the Break bit (RISRl[0]) is set to ‘1’.
Line-break generation out of the transmitter is possible when the ETC bit (COR2[5]) is set to ‘1’. A
line break is generated when the output at the TXD pin is all zeroes (low) for at least one full
character time.
Line breaks can be transmitted by embedding certain sequences in the data stream (defined in
13). These sequences are valid for transmitting breaks only if ETC is set to ‘1’. The embedded
sequences to transmit a BREAK are listed in
DCE
CTS
RTS
Mode
DTE
RTS
CTS
Pin Name
CD2401
DTR
RTS
CTS
Signal remote to transmit.
Not implemented in this direction.
Request remote permission to transmit.
Enable transmitter.
Table
Out-of-Band Flow
13.
Control
Datasheet
Table