mcs7840 MosChip, mcs7840 Datasheet - Page 6

• Manufacturer Part Number: mcs7840
• Description: Usb-2.0 To Four Serial Ports
• Manufacturer: MosChip

Page 6
MCS7840
USB-2.0 to Four Serial Ports
Pin
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
EXT_CLOCK
DSR_2_N
DCD_2_N
DSR_3_N
DCD_3_N
RTS_2_N
CTS_2_N
DTR_3_N
RTS_3_N
CTS_3_N
RI_2_N
RI_3_N
RXD_2
RXD_3
TXD_3
Name
GND
Vcc
Vcc
3IO
K
K
Output
Output
Output
Output
Power
Power
Power
Type
Input
Input
Input
Input
Input
Input
Input
Input
Input
Input
Input
Serial Port 2 Request To Send (in serial protocol),
active low.
Serial Port 2 Serial Receive Data in from transceiver
or IrDA data in from IrDA detector.
Core Ground.
Input Clock from external world. In normal operation
mode, clock can be supplied to serial ports and used
for custom BAUD Rate of user’s choice. In test mode,
clock will be the test clock input from external world.
Power Pin (D3V3).
Serial Port 2 Ring Indicator, active low.
Serial Port 2 Data Set Ready (in serial protocol), active
low.
Serial Port 2 Data Carrier Detect (in serial protocol),
active low.
Serial Port 2 Clear To Send (in serial protocol), active
low.
Serial Port 3 Transmit Data out to transceiver, or IrDA
data out to IR LED.
Serial Port 3 Data Terminal Ready (in serial protocol),
active low.
Serial Port 3 Request To Send (in serial protocol),
active low.
Serial Port 3 Serial Receive Data in from transceiver,
or IrDA data in from IrDA detector.
Serial Port 3 Ring Indicator, active low.
Serial Port 3 Data Set Ready (in serial protocol), active
low.
Serial Port 3 Data Carrier Detect (in serial protocol),
active low.
Serial Port 3 Clear To Send (in serial protocol), active
low.
Power Pin (1.8V)
Functional Description
Rev.
1.2