HD6433044 Hitachi Semiconductor, HD6433044 Datasheet - Page 510

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HD6433044

Manufacturer Part Number
HD6433044
Description
(HD64 Series) Hitachi Single-Chip Microcomputer
Manufacturer
Hitachi Semiconductor
Datasheet

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14.2 Register Descriptions
This section describes the new or modified registers and bit functions in the smart card interface.
14.2.1 Smart Card Mode Register (SCMR)
SCMR is an 8-bit readable/writable register that selects smart card interface functions.
SCMR is initialized to H'F2 by a reset and in standby 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.
Bit 3
SDIR
0
1
Bit
Initial value
Read/Write
Description
TDR contents are transmitted LSB-first
Received data is stored LSB-first in RDR
TDR contents are transmitted MSB-first
Received data is stored MSB-first in RDR
7
1
Reserved bits
6
1
Reserved bits
5
1
500
4
1
Smart card data transfer direction
Selects the serial/parallel conversion format
SDIR
R/W
3
0
Smart card data invert
Inverts data logic levels
SINV
R/W
2
0
Smart card interface
mode select
Enables or disables
the smart card
interface function
1
1
(Initial value)
SMIF
R/W
0
0

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