h8s-2646 Renesas Electronics Corporation., h8s-2646 Datasheet - Page 488
h8s-2646
Manufacturer Part Number
h8s-2646
Description
Renesas 16-bit Single-chip Microcomputer H8s Family/h8s/2600 Series
Manufacturer
Renesas Electronics Corporation.
Datasheet
1.H8S-2646.pdf
(1165 pages)
- Current page: 488 of 1165
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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: It is 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. 5.00 Sep 22, 2005 page 462 of 1136
REJ09B0257-0500
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
:
:
:
—
—
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
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