474
Chapter 14
Queued CSI (CSI30, CSI31)
User’s Manual U16702EE3V2UD00
(8)
Queued CSI Data Length Selection Registers (CSIL0, CSIL1)
The CSIL register is an 8-bit register that specifies the active voltage level of the Chip Select pins
and the Queued CSI data length.
This register can be read or written in 1-bit and 8-bit units.
This register can be overwritten only while CTXE = 0 and CRXE = 0 (CSIM register). Write opera-
tion during CTXE = 1 or CRXE = 1 is prohibited.
Initial value is 00H by reset.
Figure 14-9:
Queued CSI Data Length Selection Registers (CSIL0, CSIL1) Format
Caution:
Rewriting this register is only permitted when CTXE = 0 and CRXE = 0.
See section
14.3.3 ”Data Length Select Function” on page 478
for further explanation on the
data length selection.
Symbol
7
6
5
4
3
2
1
0
Address
R/W
After
reset
CSILn
(n = 0, 1)
CSLV3
CSLV2
CSLV1
CSLV0
CCL3
CCL2
CCL1
CCL0
FFFFFD49H,
FFFFFD69H
R/W 00H
CSLV3 - CSLV0
Chip Select active level selection
0
Chip Select signal is active low
1
Chip Select signal is active high
CCL3
CCL2
CCL1
CCL0
Transfer data length
0
0
0
0
Data length is 16 bits
0
0
0
1
Setting prohibited
0
0
1
0
0
0
1
1
0
1
0
0
0
1
0
1
0
1
1
0
0
1
1
1
1
0
0
0
Data length is 8 bits
1
0
0
1
Data length is 9 bits
1
0
1
0
Data length is 10 bits
1
0
1
1
Data length is 11 bits
1
1
0
0
Data length is 12 bits
1
1
0
1
Data length is 13 bits
1
1
1
0
Data length is 14 bits
1
1
1
1
Data length is 15 bits
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