10. Serial Communication Interface
Rev.3.00 Jul. 19, 2007 page 254 of 532
REJ09B0397-0300
Serial Control/Status Register 1 (SCSR1)
Bit
7 6 5 4 3 2 1 0
⎯
SOL
ORER
⎯
⎯
⎯
⎯
STF
Initial
value 1 0 0 0 0 0 0 0
Read/Write
⎯
R/W
R/(W)
*
⎯
⎯
⎯
R/W
R/W
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
1
output level. When read, SOL returns the
output level at the SO
1
pin. After completion of a transmission, SO
1
continues to output the value
of the last bit of transmitted data. The SO
1
output can be changed by writing to SOL before or after
a transmission. The SOL bit setting remains valid only until the start of the next transmission. To
control the level of the SO
1
pin after transmission ends, it is necessary to write to the SOL bit at
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
1
pin output level is low
(initial value)
Write:
SO
1
pin output level changes to low
1 Read:
SO
1
pin output level is high
Write:
SO
1
pin output level changes to high
Содержание F-ZTAT H8 Series
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