h8s-2635 Renesas Electronics Corporation., h8s-2635 Datasheet - Page 520

• Manufacturer Part Number: h8s-2635
• Description: Renesas 16-bit Single-chip Microcomputer H8s Family/h8s/2600 Series
• Manufacturer: Renesas Electronics Corporation.

Section 13 Serial Communication Interface (SCI)
13.2.9
SCMR selects LSB-first or MSB-first by means of bit SDIR. Except in the case of asynchronous
mode 7-bit data, LSB-first or MSB-first can be selected regardless of the serial communication
mode. The descriptions in this chapter refer to LSB-first transfer.
For details of the other bits in SCMR, see section 14.2.1, Smart Card Mode Register (SCMR).
SCMR is initialized to H'F2 by a reset and in standby mode.
Bits 7 to 4—Reserved: These bits are always read as 1 and cannot be modified.
Bit 3—Smart Card Data Transfer Direction (SDIR): Selects the serial/parallel conversion
format.
This bit is valid when 8-bit data is used as the transmit/receive format.
Rev. 6.00 Feb 22, 2005 page 460 of 1484
REJ09B0103-0600
Bit 3
SDIR
0
1
Bit
Initial value
R/W
Smart Card Mode Register (SCMR)
Description
TDR contents are transmitted LSB-first
Receive data is stored in RDR LSB-first
TDR contents are transmitted MSB-first
Receive data is stored in RDR MSB-first
:
:
:
¾
¾
7
1
¾
¾
6
1
¾
¾
5
1
¾
¾
4
1
SDIR
R/W
3
0
SINV
R/W
2
0
¾
¾
1
1
(Initial value)
SMIF
R/W
0
0