Rev. 2.0, 11/00, page 621 of 1037
(3) Servo Data Register (SPDR)
0
0
1
0
2
0
3
0
4
0
5
6
7
—
—
—
—
—
—
SPDR4
SPDR3
SPDR2
SPDR1
SPDR0
1
1
1
R/W
R/W
R/W
R/W
R/W
Bit :
Initial value :
R/W :
Stores the data of each pin (PS4 to PS0) when the servo port/general-purpose dual-purpose pin is
used as general-purpose port. If the port is accessed for read when SPCR is 1 (output), the
SPDRn value is read directly. Accordingly, this register is not affected by the state of the pin. If
the port is accessed for read when SPCR is 0 (input), the state of the pin is read out.
SPDR is an 8-bit read/write register. Bits 7-5 are reserved. No write in it is valid. If read is
attempted, an undetermined value is read out.
SPCR is initialized to H'E0 by reset or stand-by.
Содержание Hitachi H8S/2191
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Страница 639: ...Rev 2 0 11 00 page 612 of 1037 28 1 2 Block Diagram Figure 28 1 shows a block diagram of the servo circuits...
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