R01UH0823EJ0100 Rev.1.00
Page 646 of 1823
Jul 31, 2019
RX23W Group
24. Port Output Enable 2 (POE2a)
24.2.3
Input Level Control/Status Register 2 (ICSR2)
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.
PIE2 Bit (Port Interrupt Enable 2)
This bit enables or disables OEI2 interrupt requests when the POE8F flag is set to 1.
POE8E Bit (POE8 High-Impedance Enable)
This bit specifies whether to place the MTU0 pins in high-impedance when the POE8F flag is set to 1.
This flag indicates that a high-impedance request has been input to the POE8# pin.
[Setting condition]
When the input set by ICSR2.POE8M[1:0] bits occurs at the POE8# pin
[Clearing conditions]
Writing 0 to POE8F after reading POE8F = 1
When writing 0 to the flag while low-level sampling is selected for the ICSR2.POE8M[1:0] bits, the POE8# pin
input must be at the high level.
For details, refer to
section 24.3.6, Release from the High-Impedance
.
Address(es): 0008 8908h
b15
b14
b13
b12
b11
b10
b9
b8
b7
b6
b5
b4
b3
b2
b1
b0
—
—
—
POE8F
—
—
POE8E PIE2
—
—
—
—
—
—
POE8M[1:0]
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
b1, b0
POE8 Mode
Select
b1 b0
0 0: Accepts a high-impedance request on the falling edge of the POE8# pin
input
0 1: Accepts a high-impedance request when the POE8# pin input has been
sampled 16 times at PCLK/8 clock cycles and all are low level.
1 0: Accepts a high-impedance request when the POE8# pin input has been
sampled 16 times at PCLK/16 clock cycles and all are low level.
1 1: Accepts a high-impedance request when the POE8# pin input has been
sampled 16 times at PCLK/128 clock cycles and all are low level.
b7 to b2
—
Reserved
These bits are read as 0. The write value should be 0.
R/W
b8
Port Interrupt
Enable 2
0: OEI2 interrupt requests disabled
1: OEI2 interrupt requests enabled
R/W
b9
POE8 High-
Impedance
Enable
0: Does not place the MTIOC0A, MTIOC0B, and MTIOC0C pins in high-
impedance.
1: Places the MTIOC0A, MTIOC0B, and MTIOC0C pins in high-impedance.
b11, b10
—
Reserved
These bits are read as 0. The write value should be 0.
R/W
b12
POE8 Flag
0:
Indicates that a high-impedance request has not been input to the POE8# pin.
1: Indicates that a high-impedance request has been input to the POE8# pin.
R/(W)
*
b15 to b13 —
Reserved
These bits are read as 0. The write value should be 0.
R/W