SH7721 datasheet(1062/1524 Pages) RENESAS

1062 / 1524 page

Section 30

SIM Card Module (SIM)

Rev. 3.00 Jan. 18, 2008 Page 1000 of 1458

REJ09B0033-0300

Bit

Bit Name

Initial

Value

R/W Description

WAIT_ER

R/W Wait Error

Indicates the wait timer error status.

0: Indicates that the interval between the start of two

successive characters has not exceeded the etu set by

SCWAIT.

[Clearing conditions]

• On reset

• When 0 is written to the WAIT_ER flag

1: Indicates that the interval between the start of two

successive characters has exceeded the etu set by

SCWAIT.

[Setting conditions]

• In T = 0 mode, when the interval between the start of a

character to be received and immediately preceding

transmitted or received character exceeds the (value of 60

× SCWAIT: Operation wait time) etu.

• In T = 1 mode, when the interval between the start of two

successive received characters exceeds the (SCWAIT

value: Character protection time) etu.

Notes:

1. Even if the RE bit in SCSCR is cleared to 0, the

WAIT_ER flag is unaffected, and the previous state

is retained.

2. In T = 0 mode, even if the setting condition for the

WAIT_ER flag is satisfied when the RE bit is set to

1, the WAIT_ER flag may not be set to 1. In this

case, the RE bit has been set to 1, then the

WAIT_ER flag is set to 1 after 60

× (SCWAIT + n)

etu (n

≥ 0: depending on the timing for setting the

RE bit to 1) since the last transmission or reception.

3. In T = 0 mode, if the WAIT_ER flag does not need

to be set to 1 after 60

× (SCWAIT + n) etu since the

last transmission or reception, the mode should be

changed from T = 0 to T = 1, and changed to T = 0

again by the PB bit in SCSCMR. In T = 1 mode, if

the WAIT_ER flag does not need to be set to 1 after

(SCWAIT) etu since the last reception, the mode

should be changed from T = 1 to T = 0, and

changed to T = 1 again by the PB bit in SCSCMR.

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