Register Descriptions; Smart Card Mode Register (Scmr) - Hitachi H8/3062 Hardware Manual

13.2

Register Descriptions

This section describes the new or modified registers and bit functions in the smart card interface.
13.2.1

Smart Card Mode Register (SCMR)

SCMR is an 8-bit readable/writable register that selects smart card interface functions.
Bit 7
—
Initial value 1
Read/Write —
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
1
format.*
Bit 3
SDIR Description
0 TDR contents are transmitted LSB-first
Receive data is stored LSB-first in RDR
1 TDR contents are transmitted MSB-first
Receive data is stored MSB-first in RDR
420
6 5
— —
1 1
— —
Reserved bits
4 3
— SDIR SINV
1 0
— R/W R/W
Smart card data invert
Inverts data logic levels
Smart card data transfer direction
Selects the serial/parallel conversion format
2 1
— SMIF
0 1
— R/W
Reserved bit
Smart card interface
mode select
Enables or disables
the smart card interface
function
(Initial value)
0
0