Rohm LAPIS SEMICONDUCTOR ML620Q503, User Manual

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ML620Q503/Q504 User's Manual
Chapter 12 Synchronous Serial Port with FIFO
FEUL620Q504 12–21
12.3.6 Transfer Size
The transfer size can be selected in 8 bits (byte) or 16 bits (word).
Transfer data read/write must be adjusted to the transfer size. As the number of FIFO stages is the same for both
byte and word, the number of transfers is the same.
The master and slaves which communicate with each other must have the same value for SF0SIZ.
CPHA=0
SCK
(CPOL=0
)
SSN
MOSI BIT 0 BIT 7
BIT7 MISO BIT0
SCK
Cycle
1 2 3 4 5 6 7 8
BIT8 BIT15
BIT8 BIT15
9 10 11 12 13 14 15 16
SCK
(CPOL=1
)
Figure 12-4 SSIOF Bus Waveform When Transfer Size SIZE = 1 (16-Bit)
CPHA=1
SSN
MOSI BIT 0 BIT 7
BIT 7 MISO BIT 0
SCK Cycle 1 2 3 4 5 6 7 8
BIT8 BIT15
BIT8 BIT15
9 10 11 12 13 14 15 16
SCK
(CPOL=0
)
SCK
(CPOL=1
)
Figure 12-5 SSIOF Bus Waveform When Transfer Size SF0SIZ = 1 (16-Bit)
SINF0
SSF0
SCKF0
(SF0CPOL=0)
SCKF0
(SF0CPOL=1)
SOUTF0
SINF0
SSF0
SCKF0
(SF0CPOL=0)
SCKF0
(SF0CPOL=1)
SOUTF0
SF0CPHA=0
SF0CPHA=1
SCKF0
Cycle
SCKF0
Cycle