Rev. 2.00, 09/03, page 433 of 690
Bit
Bit Name
Initial Value
R/W
Description
15 to 8
0
R
Reserved
These bits are always read as 0. The write
value should always be 0.
7
IRMOD
0
R/W
IrDA Mode
Selects whether this module operates as an
IrDA serial communication interface or as an
SCIF.
0: Operates as an SCIF
1: Operates as an IrDA
6 to 3
ICK3 to ICK0
0
R/W
Output Pulse Division Ratio
Specifies the ratio for dividing the peripheral
clock (P
φ
) to generate the IRCLK clock pulse
to be used for IrDA. IRCLK is obtained as
follows:
IRCLK = 1/(2N + 2)
×
P
φ
N = Value set by ICK3 to ICK0
2
PSEL
0
R/W
Output Pulse Width Select
PSEL selects an IrDA output pulse width that
is 3/16 of the bit length for 115 kbps or 3/16 of
the bit length for the selected baud rate.
0: Pulse width is 3/16 of the bit length
1: Pulse width is 3/16 of 115 kbps bit length for
the baud rate selected by ICK3 to ICK0
1, 0
0
R
Reserved
These bits are always read as 0. The write
value should always be 0.
Example:
P
φ
clock: 14.7456 MHz
IRCLK: 921.6 kHz (fixed)
N: Setting of ICK3 to ICK0 (0
≤
N
≤
15)
– 1
≥
7
N
≥
P
φ
2
×
IRCLK
Accordingly, N is 7.
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