SH7720 Datasheet, PDF (1066/1524 Pages) Renesas Technology Corp – Renesas 32-Bit RISC Microcomputer SuperHTM RISC engine Family / SH7700 Series

Section 30 SIM Card Module (SIM)
30.3.11 Guard Extension Register (SCGRD)
SCGRD is an 8-bit readable/writable register that sets the time added for character protection.
Initial
Bit
Bit Name Value R/W Description
7 to 0 SCGRD7 All 0
to
SCGRD0
R/W Guard Extension
Indicate the time added for character protection after
transmitting a character to the smart card. The interval
between the start of two successive characters is 12 etus
(no addition) when the value of this register is H'00, is 13
etus when the value is H'01, and so on, up to 266 etus for
H'FE. If the value of this register is H'FF, the interval
between the start of two successive characters is 11 etus
in T = 1 mode and is 12 etus in T = 0 mode.
30.3.12 Wait Time Register (SCWAIT)
SCWAIT is a 16-bit readable/writable register. If the interval between the start of two successive
characters exceeds the set value (in etu units), a wait time error is generated.
Initial
Bit
Bit Name Value R/W Description
15 to 0 SCWAIT15 All 0
to
SCWAIT0
R/W Wait Time Register
• T=0
In this mode, the operation wait time can be set in this
register. If the interval between the start of characters
to be received and transmitted or received characters
immediately before exceeds the (60 × the value set in
this register) etu, the WAIT_ER flag is set to 1.
However, if SCWAIT is set to H'0000, the WAIT_ER
flag is set after 60 etus.
• T=1
In this mode, the character wait time can be set in this
register. If the interval between the start of two
successive received characters exceeds the (the
value set in this register) etu, the WAIT_ER flag is set
to 1. However, if SCWAIT is set to H'0000, the
WAIT_ER flag is set after 1 etu.
Rev. 3.00 Jan. 18, 2008 Page 1004 of 1458
REJ09B0033-0300