User's Manual Part 1

MC75 Hardware Interface Description
Strictly confidential / Draft
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MC75_V00.190a Page 55 of 91 15.02.2005
The timing of a PCM short frame is shown in Figure 25. In PCM mode, 16-bit data are
transferred in both directions at the same time. The duration of a frame sync pulse is one
BITCLK period, starting at the rising edge of BITCLK. TXDAI data is shifted out at the next
rising edge of BITCLK. The most significant bit is transferred first. Data transmitted from
RXDAI of the internal application is sampled at the falling edge of BITCLK.
BITCLK
TXDAI
RXDAI
FS_IN
MSB
LSB
1
16
125µs
Figure 25: PCM timing