590
SMR2—Serial Mode Register 2
H'FF88
Smart Card Interface 2
Bit
Initial value
Read/Write
7
GM
0
R/W
6
BLK
0
R/W
5
PE
0
R/W
4
O/
E
0
R/W
3
BCP1
0
R/W
2
BCP0
0
R/W
1
CKS1
0
R/W
0
CKS0
0
R/W
0
0 ø clock
ø/4 clock
ø/16 clock
ø/64 clock
Clock Select
1
1
0
1
0 Even parity
Odd parity
Parity Mode
1
0 Setting prohibited
Parity bit addition and checking enabled
Parity Enable
(Set to 1 when using smart card interface)
1
0 Normal smart card interface mode
Block transfer mode
Block Transfer Mode Select
1
0 Normal smart card interface mode operation
• TEND flag generation 12.5 etu after beginning of start bit (11.5 etu in block transfer mode)
• Clock output on/off control only
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)
GSM Mode
1
Note: etu (Elementary Time Unit): Time for transfer of 1 bit
0
0
BCP1
BCP0
Basic Clock Pulse
32 clock periods
64 clock periods
372 clock periods
256 clock periods
Basic Clock Pulse
1
1
0
1
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