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10. Serial Communication Interface
Serial Control/Status Register 1 (SCSR1)
Bit
Initial value
Read/Write
Note:
Only a write of 0 for flag clearing is possible.
*
SCSR1 is an 8-bit read/write register indicating operation status and error status.
Upon reset, SCSR1 is initialized to H'80.
Do not read or write to SCSR1 during a transfer operation, as this will cause erroneous operation.
Bit 7—Reserved Bit: Bit 7 is reserved; it is always read as 1, and cannot be modified.
Bit 6—Extended Data Bit (SOL): Bit 6 sets the SO
output level at the SO
of the last bit of transmitted data. The SO
a transmission. The SOL bit setting remains valid only until the start of the next transmission. To
control the level of the SO
the end of each transmission. Do not write to this register while transmission is in progress,
because that may cause a malfunction.
Bit 6: SOL
Description
0
Read: SO
Write: SO
1
Read: SO
Write: SO
Rev.3.00 Jul. 19, 2007 page 254 of 532
REJ09B0397-0300
7
6
5
⎯
SOL
ORER
1
0
0
⎯
R/W
R/(W)*
pin. After completion of a transmission, SO
1
1
pin after transmission ends, it is necessary to write to the SOL bit at
1
pin output level is low
1
pin output level changes to low
1
pin output level is high
1
pin output level changes to high
1
4
3
⎯
⎯
0
0
⎯
⎯
output level. When read, SOL returns the
1
output can be changed by writing to SOL before or after
2
1
⎯
⎯
0
0
⎯
R/W
continues to output the value
1
(initial value)
0
STF
0
R/W
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