CAM35C44 View Datasheet(PDF) - SMSC -> Microchip
Part Name
Description
MFG CO.
'CAM35C44' PDF : 50 Pages View PDF
TABLE 20 - SOFTWARE SELECT A REGISTER
D7 D6 D5 D4 D3 D2 D1 D0 DEFAULT
CR05 R/W
Software Select A
0x00
CR06 - Software Select B
The Software Select B register CR06 is directly
connected to the read-only IrCC 2.0 Software
Select B register in SCE Register Block Three.
Writing to CR06 is the only way
to revise the contents of the Software Select B
register. CR06 can only be accessed in the
configuration state and only after the CSR has
been initialized to 06H. The default value of this
register after power up is 00H (TABLE 21).
CR06
TABLE 21 - SOFTWARE SELECT B REGISTER
D7 D6 D5 D4 D3
D2
D1
R/W
Software Select B
D0 DEFAUL
T
0x00
CR07 - IR Half Duplex Time-Out
CR07 is the IR Half Duplex Time-Out register
(TABLE 22).
until the last bit has been received and the time-
out expires. If the start bit of another character
is received during this time-out, the timer is
restarted after the new character is received.
If the Half Duplex option is selected (see section
HALF DUPLEX, Bit 2 on page 24), the IR half
duplex time-out constrains the timing of
transmit/receive direction mode changes in the
IrCC 2.0. The IR half duplex time-out is started
as each IR message data bit is transferred and
prevents direction mode changes until the time-
out expires. The timer is restarted whenever
new data is transferred in the current direction
mode.
For example, in an SIR mode if data is loaded
into the transmit buffer while a character is being
received, the transmission will not start
The IRCC block in the CAM35C44 also includes
an 8 bit IR half duplex time-out register, like
CR07, in SCE Register Block 5. These two
registers behave like the other IRCC legacy
controls where either source uniformly updates
the value of both registers when either register is
explicitly written using IOW or following a device-
level POR. IRCC software resets do not affect
these registers.
The IR half duplex time-out is programmable
from 0 to 25.5ms in 100#s increments, as
follows:
IR HALF DUPLEX TIME-OUT = (CR07) x 100#s
CR07
TABLE 22 - IR HALF DUPLEX TIME-OUT REGISTER
D7
D6
D5
D4
D3
D2
D1
R/W
IR HALF DUPLEX TIME-OUT
D0 DEFAULT
0x03
26
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