Tdm Mode - Renesas RZ/A Series User Manual

RZ/A1L Group, RZ/A1LU Group, RZ/A1LC Group
19.4.3

TDM Mode

TDM mode is provided to enable connection to multi-channel devices for TDM. This mode can be set using the TDM bit
in the TDM mode register (SSITDMR). In this mode, the SSIWS signal is high only for system word 1 period and low
for the other periods. The pulse produced on the SSIWS signal is defined as SYNC pulse. Note that the SYNC pulse
always has the positive polarity (high only for system word 1 period).
Figure 19.18 and Figure 19.19 show the TDM formats without and with padding, respectively.
SCKP = 0, SWSP = 0, DEL = 1, CHNL = 10, SPDP = don't care, SDTA = don't care, TDM = 1
System word length = data word length
SSISCK
SSIWS
SSIDATA LSB
Figure 19.18 TDM Format (6 system words, no padding)
SCKP = 0, SWSP = 0, DEL = 1, CHNL = 10, SPDP = 1, SDTA = 0, TDM = 1
System word length > data word length
SSISCK
SSIWS
SSIDATA
Figure 19.19 TDM Format (6 system words, with padding)
R01UH0437EJ0600 Rev.6.00
Jan 29, 2021
MSB LSB MSB LSB MSB
Data word 1 = Data word 2 =
system word 1 system word 2
MSB LSB MSB LSB
Data word 1 Data word 2
System word 1 System word 2
LSB MSB LSB MSB
Data word 3 = Data word 4 =
system word 3 system word 4
TDM frame
MSB LSB MSB LSB MSB
Data word 3 Data word 4
System word 3 System word 4
TDM frame
19. Serial Sound Interface
LSB MSB LSB MSB
Data word 5 = Data word 6 =
system word 5 system word 6
LSB MSB LSB MSB
Data word 5 Data word 6
System word 5 System word 6
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