D12320VF25V Datasheet, PDF (540/1146 Pages) Renesas Technology Corp – Old Company Name in Catalogs and Other Documents

Section 13 Smart Card Interface
13.2.3 Serial Mode Register (SMR)
Bit
:
7
6
5
4
3
2
GM
BLK
PE^*
O/E BCP1 BCP0
Initial value :
0
0
0
0
0
0
R/W
: R/W
R/W
R/W
R/W
R/W
R/W
Note: * When the smart card interface is used, set a value of 1 in bit 5.
1
CKS1
0
R/W
0
CKS0
0
R/W
The function of bits 7, 6, 3, and 2 of SMR changes in smart card interface mode.
Bit 7—GSM Mode (GM): Sets the smart card interface function to GSM mode.
This bit is cleared to 0 when the normal smart card interface is used. In GSM mode, this bit is set
to 1, the timing of setting of the TEND flag that indicates transmission completion is advanced,
and clock output control mode addition is performed. The contents of the clock output control
mode addition are specified by bits 1 and 0 of the serial control register (SCR).
Bit 7
GM
Description
0
Normal smart card interface mode operation
(Initial value)
• TEND flag generation 12.5 etu (11.5 etu in block transfer mode) after beginning of
start bit
• Clock output on/off control only
1
GSM mode smart card interface mode operation
• TEND flag generation 11.0 etu after beginning of start bit
• High/low fixing control possible in addition to clock output on/off control (set by
SCR)
Note: etu: Elementary time unit (time for transfer of 1 bit)
Rev.7.00 Feb. 14, 2007 page 506 of 1108
REJ09B0089-0700