h8s-2646 Renesas Electronics Corporation., h8s-2646 Datasheet - Page 468
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h8s-2646
Manufacturer Part Number
h8s-2646
Description
Renesas 16-bit Single-chip Microcomputer H8s Family/h8s/2600 Series
Manufacturer
Renesas Electronics Corporation.
Datasheet
1.H8S-2646.pdf
(1165 pages)
- Current page: 468 of 1165
- Download datasheet (6Mb)
Section 13 Serial Communication Interface (SCI)
13.2
13.2.1
RSR is a register used to receive serial data.
The SCI sets serial data input from the RxD pin in RSR in the order received, starting with the
LSB (bit 0), and converts it to parallel data. When one byte of data has been received, it is
transferred to RDR automatically.
RSR cannot be directly read or written to by the CPU.
13.2.2
RDR is a register that stores received serial data.
When the SCI has received one byte of serial data, it transfers the received serial data from RSR to
RDR where it is stored, and completes the receive operation. After this, RSR is receive-enabled.
Since RSR and RDR function as a double buffer in this way, enables continuous receive
operations to be performed.
RDR is a read-only register, and cannot be written to by the CPU.
RDR is initialized to H'00 by a reset, in standby mode, watch mode, subactive mode, and subsleep
mode, or module stop mode.
Rev. 5.00 Sep 22, 2005 page 442 of 1136
REJ09B0257-0500
Bit
Initial value
R/W
Bit
R/W
Register Descriptions
Receive Shift Register (RSR)
Receive Data Register (RDR)
:
:
:
:
:
—
7
R
7
0
—
6
R
6
0
—
5
R
5
0
—
4
R
4
0
—
3
R
3
0
—
2
R
2
0
—
1
R
1
0
—
0
R
0
0
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