Renesas R8C/15 Información técnica Pagina 158

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R8C/14 Group, R8C/15 Group 15. Clock Synchronous Serial I/O with Chip Select (SSU)
Rev.2.10 Jan 19, 2006 Page 144 of 253
REJ09B0164-0210
Figure 15.4 SSMR Register
SS Mode Register
(2)
Symbol Address After Reset
SSMR
00BAh 00011000b
Bit Symbol Bit Name Function RW
Reserved Bit
NOTES :
1.
2.
0 : “H w hen clock stops
1 : “L” w hen clock stops
Set to “1”.
When read, its content is 1”.
RW
RW
RW
RW
0 : Transfers data at MSB first
1 : Transfers data at LSB first
R
BC1
BC2
Bit Counter 2 to 0
b2 b1 b0
0 0 0 : 8-bit left
0 0 1 : 1-bit left
0 1 0 : 2-bit left
0 1 1 : 3-bit left
1 0 0 : 4-bit left
1 0 1 : 5-bit left
1 1 0 : 6-bit left
1 1 1 : 7-bit left
BC0
R
R
MLS
Nothing is assigned. When w rite, set to “0”.
When read, its content is “1”.
(b3)
(b4)
CPHS
SSCK Clock Phase Select Bit
(1)
0 : Change data at odd edge
(Dow nloads data at even edge)
1 : Change data at even edge
(Dow nloads data at odd edge)
CPOS
SSCK Clock Polarity Select Bit
(1)
b7 b6 b5 b4
Refer to
15.1.1 Association between Transfer Clock Polarity, Phase and Data
for the setting of the CPHS and
CPOS bits.
Refer to
20.6.1 Access Registers Associated with SSU
for accessing registers associated with SSU.
b3 b2 b1 b0
1
MSB First/LSB First Select Bit
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