mcs7781 MosChip, mcs7781 Datasheet - Page 8

• Manufacturer Part Number: mcs7781
• Description: Usb To Irda Port
• Manufacturer: MosChip

Page 8
MCS7781
USB to IrDA Port
XCVR Register
Offset: 0x02
This table shows
the usage of
XCVR Register
for various
Transceivers.
SMODE0
SMODE1
RXFAST
EEDATA
MODE0
MODE1
TXCUR
INVRX
STFIR
INVTX
XCVR
Name
[15:12]
[6:4]
Bit
10
11
0
1
2
3
7
8
9
SHARP GP2W100YP
Vishay TDFU6614
Vishay TDFU6102
Agilent 3602/3600
Access
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
Vendor
R
Default
0000
000
0
0
0
0
0
1
0
0
Code
0
0
1
2
The usage varies with the transceiver make and is
reflected in the transceiver truth table.
The usage varies with the transceiver make and is
reflected in the transceiver truth table.
1 = Puts the transceiver in configuration mode.
0 = Puts the transceiver in data transfer mode.
These bits control the current supplied to the TX-LED.
The usage varies with the transceiver make and is
reflected in the transceiver truth table.
Value of MODE0 to put the device into shut down.
Varies with transceiver make.
Value of MODE1 to put the device into shut down.
Varies with transceiver make.
Loaded from the EEPROM.
1 = Causes the device to use RXFAST as the input pin
0 = Causes the device to use RXSLOW as the receive
1 = Inverts the data bits sent to the transceiver.
0 = The transmit line works as an active high signal.
1 = RXD line from transceiver is treated as an active
0 = RXD line from transceiver is treated as an active
for receive from transceiver.
signal.
low signal.
high signal.
Can switch pins dynamically. There is no latching mechanism
MODE0
1->0
1->0
1->0
MODE1
Dynamic Configuration
0
0
0
Description
STC_FIR
0
0
1
Latched From
TXD
TXD
TXD
Rev.
2.1