
Section 10 Serial Communication Interface
Rev. 6.00 Sep 12, 2006 page 294 of 526
REJ09B0326-0600
Transmit Data Register (TDR)
Bit
7 6 5 4 3 2 1 0
TDR7 TDR6 TDR5 TDR4 TDR3 TDR2 TDR1 TDR0
Initial
value 1 1 1 1 1 1 1 1
Read/Write
R/W R/W R/W R/W R/W R/W R/W R/W
TDR is an 8-bit register that stores transmit data. When TSR is found to be empty, the transmit
data written in TDR is transferred to TSR, and serial data transmission is started. Continuous
transmission is possible by writing the next transmit data to TDR during TSR serial data
transmission.
TDR can be read or written by the CPU at any time.
TDR is initialized to H'FF upon reset, and in standby, watch, subactive, or subsleep mode.
Serial Mode Register (SMR)
Bit
7 6 5 4 3 2 1 0
COM
CHR
PE
PM
STOP
MP
CKS1
CKS0
Initial
value 0 0 0 0 0 0 0 0
Read/Write
R/W R/W R/W R/W R/W R/W R/W R/W
SMR is an 8-bit register used to set the serial data transfer format and to select the clock source for
the baud rate generator.
SMR can be read or written by the CPU at any time.
SMR is initialized to H'00 upon reset, and in standby, watch, subactive, or subsleep mode.
Bit 7
Communication Mode (COM):
Bit 7 selects whether SCI3 operates in asynchronous
mode or synchronous mode.
Bit 7: COM
Description
0
Asynchronous mode
(initial value)
1 Synchronous
mode
Содержание F-ZTAT H8/3642A Series
Страница 6: ...Rev 6 00 Sep 12 2006 page iv of xx ...
Страница 8: ...Rev 6 00 Sep 12 2006 page vi of xx ...
Страница 21: ...Rev 6 00 Sep 12 2006 page xix of xx Appendix E Product Code Lineup 522 Appendix F Package Dimensions 524 ...
Страница 22: ...Rev 6 00 Sep 12 2006 page xx of xx ...
Страница 124: ...Section 5 Power Down Modes Rev 6 00 Sep 12 2006 page 102 of 526 REJ09B0326 0600 ...
Страница 188: ...Section 6 ROM Rev 6 00 Sep 12 2006 page 166 of 526 REJ09B0326 0600 ...
Страница 190: ...Section 7 RAM Rev 6 00 Sep 12 2006 page 168 of 526 REJ09B0326 0600 ...
Страница 298: ...Section 9 Timers Rev 6 00 Sep 12 2006 page 276 of 526 REJ09B0326 0600 ...
Страница 378: ...Section 12 A D Converter Rev 6 00 Sep 12 2006 page 356 of 526 REJ09B0326 0600 ...
Страница 446: ...Section 13 Electrical Characteristics Rev 6 00 Sep 12 2006 page 424 of 526 REJ09B0326 0600 ...