mcs7840 MosChip, mcs7840 Datasheet - Page 31

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

Rev.
Serial Port 1 – Device Confi guration Register 0
1.2
Reserved
DCR0
Bit[7]
[3:2]
[5:4]
Bit
0
1
6
7
Reserved
Reserved
GPIO_
Name
Bit[6]
IrDA_
Mode
Mode
RTS_
IrDA_
Mode
SDM
RS_
CM
0:
1:
Reserved
00:
10:
00:
01:
10:
11:
0:
1:
Bit[5]
Do not shut down the transceiver
Even when USB SUSPEND is engaged
Shut down the transceiver
when USB SUSPEND is engaged
GPIO = Input
GPIO = Output
RTS is controlled by Control Bit Map.
Signal is active low;
RTS is controlled by Control Bit Map.
Signal is active high;
Drive RTS active
when Downstream Data Buffer is NOT EMPTY;
Otherwise Drive RTS inactive.
Drive RTS inactive
when Downstream Data Buffer is NOT EMPTY;
Otherwise Drive RTS active.
RS-232 / RS-422 / RS-485 Serial Port Mode.
IrDA Mode.
RTS_
CM
Transceiver Shut-Down Mode:
Bit[4]
RTSM RTS Control Method:
RS-232 / RS-422 / RS-485
Defi nition
Reserved
Bit[3]
GPIO_
Mode
Bit[2]
USB-2.0 to Four Serial Ports
MCS7840
Reserved
Bit[1]
Default
Bit[0]
Value
SDM
RS_
00
00
1
0
0
0
Page 31