HD6417615 Hitachi Semiconductor, HD6417615 Datasheet - Page 644

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HD6417615

Manufacturer Part Number
HD6417615
Description
Hardware Manual
Manufacturer
Hitachi Semiconductor
Datasheet

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15.2.5
SICTR is a 16-bit register used to set parameters for serial port control. SICTR is initialized to
H'0000 by a reset.
When modifying bit 4, 5, or 6 (TM, SE, or DL), TE and RE should be cleared to 0 beforehand.
Bits 15 to 7—Reserved: These bits are always read as 0. The write value should always be 0.
Bit 6—Transfer Mode Control (TM): Specifies whether the transmission synchronization signal is
to be input from an external source or generated internally by the chip. When this flag is cleared,
the transmission synchronization signal is STS pin input. When this flag is set, the transmission
synchronization signal is generated by the chip, and is output to an external device from the STS
pin. This bit does not affect reception.
Bit 6: TM
0
1
Bit 5—Synchronization Signal Enable (SE): Specifies whether the synchronization signals are to
be used for all serial data transfers, or only for the first transfer.
When this bit is cleared to 0, the synchronization signals (SRS and STS) are necessary only for the
first data transfer, and are not required for subsequent transfers. When this bit is set to 1, the
synchronization signals are necessary for all data transfers.
Bit 5: SE
0
1
Initial value:
Initial value:
Serial Control Register (SICTR)
R/W:
R/W:
Bit:
Bit:
Description
External signal input from STS pin is used as transmission start indication
Internal signal output from STS pin is used as transmission start indication
Description
Continuous mode: SRS and STS are used only for the first data transfer
Interval mode: SRS and STS are used for all data transfers
15
0
R
7
0
R
R/W
TM
14
0
R
6
0
R/W
SE
13
0
R
5
0
R/W
DL
12
0
R
4
0
R/W
TIE
11
0
R
3
0
R/W
RIE
10
0
R
2
0
R/W
TE
9
0
R
1
0
(Initial value)
(Initial value)
R/W
RE
8
0
R
0
0
631

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