R01UH0822EJ0100 Rev.1.00
Page 533 of 1041
Jul 31, 2019
RX13T Group
20. Port Output Enable 3 (POE3C)
[Clearing condition]
By writing 0 to the POE10F flag after reading POE10F = 1
When low-level sampling is set by the POE10M[1:0] bits, the high level needs to be input to the POE10# pin to
write 0 to this flag.
For details, refer to
section 20.3.7, Recover from High-Impedance State
.
20.2.4
Input Level Control/Status Register 6 (ICSR6)
Note 1. Can be modified only once after a reset.
Note 2. Writing 0 to this bit after reading it as 1 clears the flag and is the only allowed way.
The ICSR6 register controls the oscillation stop high-impedance and indicates status.
OSTSTE Bit (Oscillation Stop High-Impedance Enable)
This bit specifies whether to put the output of the target pin in the high-impedance state when oscillation stop is detected.
OSTSTF Flag (Oscillation Stop Detection Flag)
This flag indicates that a high-impedance request by the oscillation stop has been generated.
When the main clock oscillation stops, this flag is set to 1. To clear this flag, wait for at least 10 cycles of PCLK after this
flag becomes 1 and write 0 to this flag while the OSTDSR.OSTDF flag is 0. Writing 0 to this flag while the
OSTDSR.OSTDF flag is 1 cannot clear this flag. After clearing this flag, confirm that the flag has actually been modified
to 0.
[Setting condition]
When oscillation stop is detected
[Clearing condition]
By writing 0 to the OSTSTF flag after reading OSTSTF = 1
Address(es): POE.ICSR6 0008 C4DCh
b15
b14
b13
b12
b11
b10
b9
b8
b7
b6
b5
b4
b3
b2
b1
b0
—
—
—
OSTST
F
—
—
OSTST
E
—
—
—
—
—
—
—
—
—
Value after reset:
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Bit
Symbol
Bit Name
Description
R/W
b8 to b0
—
Reserved
These bits are read as 0. The write value should be 0.
R/W
b9
Oscillation Stop High-Impedance
Enable
0: Does not put the output in the high-impedance state when
the oscillation stop is detected.
1: Put the output in the high-impedance state when the
oscillation stop is detected.
b11, b10
—
Reserved
These bits are read as 0. The write value should be 0.
R/W
b12
Oscillation Stop Detection Flag
0: Indicates that a high-impedance request by oscillation stop
has not been generated.
1: Indicates that a high-impedance request by oscillation stop
has been generated.
b15 to b13 —
Reserved
These bits are read as 0. The write value should be 0.
R/W