HD64F3437TFI16V Renesas Electronics America, HD64F3437TFI16V Datasheet - Page 270

• Manufacturer Part Number: HD64F3437TFI16V
• Description: MCU FLASH 60K 100-TQFP
• Manufacturer: Renesas Electronics America

Specifications of HD64F3437TFI16V

• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

12.2.4
TDR is an 8-bit readable/writable register that holds the next data to be transmitted. When TSR
becomes empty, the data written in TDR is transferred to TSR. Continuous data transmission is
possible by writing the next data in TDR while the current data is being transmitted from TSR.
TDR is initialized to H'FF by a reset and in the standby modes.
12.2.5
SMR is an 8-bit readable/writable register that controls the communication format and selects the
clock source of the on-chip baud rate generator. It is initialized to H'00 by a reset and in the
standby modes. For further information on the SMR settings and communication formats, see
tables 12.7 and 12.9 in section 12.3, Operation.
Bit 7—Communication Mode (C/A): This bit selects asynchronous or synchronous
communication mode.
Bit 7: C/A
0
1
Bit 6—Character Length (CHR): This bit selects the character length in asynchronous mode.
It is ignored in synchronous mode.
Bit 6: CHR
0
1
238
Bit
Initial value
Read/Write
Bit
Initial value
Read/Write
Transmit Data Register (TDR)
Serial Mode Register (SMR)
R/W
R/W
C/A
Description
Asynchronous communication
Synchronous communication
Description
8 bits per character
7 bits per character (Bits 0 to 6 of TDR and RDR are used for transmitting and
receiving, respectively.)
7
1
7
0
CHR
R/W
R/W
6
1
6
0
R/W
R/W
PE
5
1
5
0
R/W
R/W
O/E
4
1
4
0
STOP
R/W
R/W
3
1
3
0
R/W
R/W
MP
2
1
2
0
CKS1
R/W
R/W
1
1
1
0
(Initial value)
(Initial value)
CKS0
R/W
R/W
0
1
0
0