Toshiba TLCS-900/H1 Series Manual page 192

SIRCR Bit symbol PLSEL
(1207H)
Read/Write
Reset State
Function Select
transmit
pulse width
0: 3/16
1: 1/16
7 6 5
RXSEL TXEN
0 0 0
Receive Transmit
data
0: Disable
0: "H" pulse
1: Enable
1: "L" pulse
Figure 3.9.27 IrDA Control Register
92CH21-190
4 3
RXEN SIRWD3 SIRWD2
R/W
0 0
Receive Select receive pulse width
Set effective pulse width to equal to or more than 2x ×
0: Disable
(value + 1) + 100 ns
1: Enable
Can be set: 1 to 14
Cannot be set: 0, 15
Select receive pulse width
Formula: Effective pulse width ≥ 2x × (value + 1) + 100 ns
x = 1/f
SYS
0000 Cannot be set
Equal to or more than 4x + 100 ns
0001
to
1110 Equal to or more than 30x + 100 ns
1111 Cannot be set
Receive operation
0 Disable (Received input is ignored)
1 Enable
Transmit operation
0 Disable (Input from SIO is ignored)
1 Enable
Select transmit pulse width
0 3/16
1 1/16
Note:
If a pulse width complying with IrDA1.0 standard (1.6
μs min.) can be guaranteed with a low baud rate,
setting this bit to "1" will result in reduced power
dissipation.
TMP92CH21
2 1 0
SIRWD1 SIRWD0
0 0 0
2009-06-19