Renesas SH7781 User Manual
Page 1162
22. Serial I/O with FIFO (SIOF)
Rev.1.00 Jan. 10, 2008 Page 1132 of 1658
REJ09B0261-0100
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Frame Length
The frame length to be transferred by the SIOF is specified by the FL3 to FL0 bits in SIMDR.
Table 22.7 shows the relationship between the setting values and frame length.
Table 22.7 Frame Length
FL3 to FL0
Slot Length
Number of Bits
in a Frame
Transfer Data
00xx
8
8
8-bit monaural data
0100
8
16
8-bit monaural data
0101
8
32
8-bit monaural data
0110
8
64
8-bit monaural data
0111
8
128
8-bit monaural data
10xx
16
16
16-bit monaural data
1100
16
32
16-bit monaural/stereo data
1101
16
64
16-bit monaural/stereo data
1110
16
128
16-bit monaural/stereo data
1111
16
256
16-bit monaural/stereo data
Note: x: Don't care.
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Slot Position
The SIOF can specify the position of transmit data, receive data, and control data in a frame
(common to transmission and reception) by slot numbers. The slot number of each data is
specified by the following registers.
• Transmit data: SITDAR
• Receive data: SIRDAR
• Control data: SICDAR
Only 16-bit data is valid for control data. In addition, control data is always assigned to the same
slot number both in transmission and reception.