Renesas RX Series User Manual

R01UH0823EJ0100 Rev.1.00 Page 650 of 1823
Jul 31, 2019
RX23W Group 24. Port Output Enable 2 (POE2a)
24.2.7 Input Level Control/Status Register 3 (ICSR3)
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.
OSTSTE Bit (OSTST High-Impedance Enable)
This bit permits or prohibits placement of pins for complementary PWM output from MTU and output pins for MTU0 in
the high-impedance on detection that oscillation has stopped.
OSTSTF Flag (OSTST High-Impedance Flag)
The OSTSTF flag is a status flag that indicates the state of requests to place pins in the high-impedance due to oscillation
having stopped. The value of the flag becomes 1 when oscillation stops. Ensure that the oscillation-stopped detection
signal is negated when clearing the flag by writing 0 to it. Writing 0 to the OSTSTF flag will not clear the flag while the
oscillation-stopped detection signal is being asserted; in other words, it will not clear the flag before 10 PCLK clock
cycles have elapsed after stopped oscillation was detected.
[Setting condition]
 Detection of the oscillation-stopped state
[Clearing condition]
 Writing 0 to the bit after having read its value as 1.
Address(es): 0008 890Eh
b15 b14 b13 b12 b11 b10 b9 b8 b7 b6 b5 b4 b3 b2 b1 b0
———
OSTST
F
——
OSTST
E
—————————
Value after reset:
0000000000000000
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 OSTSTE OSTST High-Impedance
Enable
0: Does not place the MTIOC0A, MTIOC0B, MTIOC0C, MTIOC3B,
MTIOC3D, MTIOC4A, MTIOC4B, MTIOC4C, and MTIOC4D pins
in high-impedance.
1: Places the MTIOC0A, MTIOC0B, MTIOC0C, MTIOC3B,
MTIOC3D, MTIOC4A, MTIOC4B, MTIOC4C, and MTIOC4D pins
in high-impedance.
R/W*
1
b11, b10 — Reserved These bits are read as 0. The write value should be 0. R/W
b12 OSTSTF OSTST High-Impedance
Flag
0: Oscillation stop is not producing a request to place pins in the high-
impedance.
1: Oscillation stop is producing a request to place pins in the high-
impedance.
R/(W)
*
2
b15 to b13 — Reserved These bits are read as 0. The write value should be 0. R/W

Renesas RX Series Specifications

General

Brand	Renesas
Model	RX Series
Category	Microcontrollers
Language	English