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Section 16 Renesas Serial Peripheral Interface
Page 800 of 2108 R01UH0134EJ0400 Rev. 4.00
Sep 24, 2014
SH7262 Group, SH7264 Group
16.3.13 Command Register (SPCMD)
Each channel has four command registers (SPCMD0 to SPCMD3). SPCMD0 to SPCMD3 are
used to set a transfer format for master mode operation. Some of the bits in SPCMD0 are used to
set a transfer mode for slave mode operation. In master mode, this module sequentially references
SPCMD0 to SPCMD3 according to the settings in bits SPSLN1 and SPSLN0 in the sequence
control register (SPSCR), and executes the serial transfer that is set in the referenced SPCMD.
While bit TEND in the status register (SPSR) indicates that transmission is not completed, correct
operation of this module cannot be guaranteed if SPCMD is changed that is referred by this
module. SPCMD referenced by this module in master mode can be checked by means of bits
SPCP1 and SPCP0 in the sequence status register (SPSSR). When the function of this module in
master mode is enabled, operation cannot be guaranteed if the value set in SPCMD0 is changed.
15 14 13 12 11 10 9 8
Bit:
Initial value:
R/W:
00000111
R/W R/W R/W R/W R/W R/W R/W R/W
SCK
DEN
SLN
DEN
SPN
DEN
LSBF SPB3 SPB2 SPB1 SPB0
76543210
Bit:
Initial value:
R/W:
00001101
R/W R R R R/W R/W R/W R/W
SSLKP
⎯⎯⎯
BRDV1 BRDV0 CPOL CPHA
Bit Bit Name
Initial
Value R/W Description
15 SCKDEN 0 R/W RSPCK Delay Setting Enable
Sets the period from the point this module in master
mode activates the SSL signal until the RSPCK
starts oscillation (RSPCK delay). If the SCKDEN bit
is 0, this module sets the RSPCK delay to 1 RSPCK.
If the SCKDEN bit is 1, this module starts the
oscillation of RSPCK at an RSPCK delay in
compliance with the clock delay register (SPCKD)
settings.
To use this module in slave mode, the SCKDEN bit
should be set to 0.
0: An RSPCK delay of 1 RSPCK
1: An RSPCK delay equal to SPCKD settings.