HD6412240 RENESAS [Renesas Technology Corp], HD6412240 Datasheet - Page 472

• Manufacturer Part Number: HD6412240
• Description: Renesas 16-Bit Single-Chip Microcomputer H8S Family / H8S/2200 Series
• Manufacturer: RENESAS [Renesas Technology Corp]

Section 12 Serial Communication Interface (SCI)
12.2.9
SCMR selects LSB-first or MSB-first by means of bit SDIR. With an 8-bit length, LSB-first or
MSB-first transfer 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 13.2.1, Smart Card Mode Register (SCMR).
SCMR is initialized to H'F2 by a reset, and in standby mode or module stop mode.
Bits 7 to 4—Reserved: Read-only bits, always read as 1.
Bit 3—Smart Card Data Transfer Direction (SDIR): Selects the serial/parallel conversion
format.
The transfer format is valid for 8-bit data.
Bit 3
SDIR
0
1
Bit 2—Smart Card Data Invert (SINV): When the smart card interface operates as a normal
SCI, 0 should be written in this bit.
Bit 1—Reserved: Read-only bit, always read as 1.
Bit 0—Smart Card Interface Mode Select (SMIF): When the smart card interface operates as a
normal SCI, 0 should be written in this bit.
Rev.3.00 Mar. 26, 2007 Page 430 of 772
REJ09B0355-0300
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
:
:
:
—
—
7
1
—
—
6
1
—
—
5
1
—
—
4
1
SDIR
R/W
3
0
SINV
R/W
2
0
—
—
1
1
(Initial value)
SMIF
R/W
0
0