Renesas SH7781 - Manual (Page 1159)

22. Serial I/O with FIFO (SIOF)
Rev.1.00 Jan. 10, 2008 Page 1129 of 1658
REJ09B0261-0100
Table 22.5 shows an example of serial clock frequency.
Table 22.5 SIOF Serial Clock Frequency
Sampling Rate*
Frame Length 8 kHz 44.1 kHz 48 kHz
32 bits 256 kHz 1.4112 MHz 1.536 MHz
64 bits 512 kHz 2.8224 MHz 3.072 MHz
128 bits 1.024 MHz 5.6448 MHz 6.144 MHz
256 bits 2.048 MHz 11.289 MHz 12.289 MHz
Note: * Control data formats are valid when the FL bits are set to 1xxx (x: Don't care).
22.4.2 Serial Timing
(1) SIOF_SYNC
The SIOF_SYNC is a frame synchronous signal. Depending on the transfer mode, it has the
following two functions.
• Synchronous pulse: 1-bit-width pulse indicating the start of the frame
• L/R: 1/2-frame-width pulse indicating the left-channel stereo data (L) in high level and the
right-channel stereo data (R) in low level
Figure 22.3 shows the SIOF_SYNC synchronization timing.