h8s-2635 Renesas Electronics Corporation., h8s-2635 Datasheet - Page 501
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h8s-2635
Manufacturer Part Number
h8s-2635
Description
Renesas 16-bit Single-chip Microcomputer H8s Family/h8s/2600 Series
Manufacturer
Renesas Electronics Corporation.
Datasheet
1.H8S-2635.pdf
(1547 pages)
- Current page: 501 of 1547
- Download datasheet (10Mb)
13.2.3
TSR is a register used to transmit serial data.
To perform serial data transmission, the SCI first transfers transmit data from TDR to TSR, then
sends the data to the TxD pin starting with the LSB (bit 0).
When transmission of one byte is completed, the next transmit data is transferred from TDR to
TSR, and transmission started, automatically. However, data transfer from TDR to TSR is not
performed if the TDRE bit in SSR is set to 1.
TSR cannot be directly read or written to by the CPU.
13.2.4
TDR is an 8-bit register that stores data for serial transmission.
When the SCI detects that TSR is empty, it transfers the transmit data written in TDR to TSR and
starts serial transmission. Continuous serial transmission can be carried out by writing the next
transmit data to TDR during serial transmission of the data in TSR.
TDR can be read or written to by the CPU at all times.
TDR is initialized to H'FF by a reset, in standby mode, watch mode * , subactive mode * , and
subsleep mode * or module stop mode.
Note: * Subclock functions (subactive mode, subsleep mode, and watch mode) are available in the
Bit
Initial value
R/W
Bit
R/W
U-mask and W-mask versions, and H8S/2635 Group only.
These functions cannot be used with the other versions.
Transmit Shift Register (TSR)
Transmit Data Register (TDR)
:
:
:
:
:
¾
7
R/W
7
1
¾
6
R/W
6
1
¾
5
R/W
5
1
¾
Section 13 Serial Communication Interface (SCI)
4
R/W
4
1
Rev. 6.00 Feb 22, 2005 page 441 of 1484
¾
3
R/W
3
1
¾
2
R/W
2
1
¾
1
REJ09B0103-0600
R/W
1
1
¾
0
R/W
0
1
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