Toshiba TLCS-900/H1 Series Manual page 190

(5) Notes
1. Baud rate for IrDA
When IrDA is operated, set 01 to SC0MOD0<SC1:0> to generate baud rate.
Settings other than the above (TA0TRG, f
2. The pulse width for transmission
The IrDA 1.0 specification is defined in Table 3.9.4.
Table 3.9.4 Baud Rate and Pulse Width Specifications
Baud Rate Modulation
2.4 Kbps RZI
9.6 Kbps RZI
19.2 Kbps RZI
38.4 Kbps RZI
57.6 Kbps RZI
115.2 Kbps RZI
The pulse width is defined as either baud rate T × 3/16 or 1.6 μs (1.6 μs is equal
to 3/16 pulse width when baud rate is 115.2 Kbps).
The TMP92CH21 has a function which can select the pulse width of
transmission as either 3/16 or 1/16. However, 1/16 pulse width can only be
selected when the baud rate is equal to or less than 38.4 Kbps.
For the same reason, when using IrDA 115.2 Kbps with USB, the + (16 − K)/16
division function in the baud rate generator of SIO0 cannot be used to generate a
115.2 Kbps baud rate, except under special conditions as explained in (6) below.
The + (16 − K)/16 division function cannot be used also when the baud rate is
38.4 Kbps and the pulse width is 1/16.
Table 3.9.5 Baud Rate and Pulse Width for (16 − K)/16 Division Function
Pulse Width
115.2 Kbps 57.6 Kbps
T × 3/16 × (Note)
T × 1/16 −
Rate Tolerance Pulse Width
(% of rate) (min)
±0.87 1.41 μs
±0.87 1.41 μs
±0.87 1.41 μs
±0.87 1.41 μs
±0.87 1.41 μs
±0.87 1.41 μs
Baud Rate
38.4 Kbps 19.2 Kbps
○ ○
− ×
○
: (16 − K)/16 division function can be used.
×: (16 − K)/16 division function cannot be used.
−: Cannot be set to 1/16 pulse width.
Note: (16 − K)/16 division function can be used under special
conditions.
92CH21-188
and SCLK0 input) cannot be used.
IO
Pulse Width Pulse Width
(typ.) (max)
78.13 μs 88.55 μs
19.53 μs 22.13 μs
9.77 μs 11.07 μs
4.88 μs 5.96 μs
3.26 μs 4.34 μs
1.63 μs 2.23 μs
9.6 Kbps 2.4 Kbps
○ ○ ○
○ ○ ○
TMP92CH21
2009-06-19