HD64F2638F20J Datasheet, PDF (520/1512 Pages) Renesas Technology Corp – Renesas 16-Bit Single-Chip Microcomputer H8S Family/H8S/2600 Series

Section 13 Serial Communication Interface (SCI)
H8S/2639, H8S/2638, H8S/2636,
H8S/2630, H8S/2635 Group
13.2.9 Smart Card Mode Register (SCMR)
Bit
:
7
⎯
Initial value :
1
R/W
:
⎯
6
5
⎯
⎯
1
1
⎯
⎯
4
3
2
⎯
SDIR SINV
1
0
0
⎯
R/W R/W
1
0
⎯
SMIF
1
0
⎯
R/W
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.
Bit 3
SDIR
0
1
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
(Initial value)
Page 470 of 1458
REJ09B0103-0800 Rev. 8.00
May 28, 2010