R01UH0822EJ0100 Rev.1.00
Page 531 of 1041
Jul 31, 2019
RX13T Group
20. Port Output Enable 3 (POE3C)
20.2.2
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.
The ICSR3 register selects the POE8# pin input mode, controls the enable/disable of interrupts, and indicates status.
POE8M[1:0] Bits (POE8 Mode Select)
These bits select the input mode of the POE8# pin.
PIE3 Bit (Port Interrupt Enable 3)
This bit enables or disables interrupt requests when the POE8F flag is set to 1.
POE8E Bit (POE8 High-Impedance Enable)
This bit specifies whether to put the output of the corresponding pin in the high-impedance state 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 the POE8M[1:0] bits occurs at the POE8# pin
[Clearing condition]
By writing 0 to the POE8F flag after reading POE8F = 1
When low-level sampling is set by the POE8M[1:0] bits, the high level needs to be input to the POE8# pin to write
0 to this flag.
Address(es): POE.ICSR3 0008 C4C8h
b15
b14
b13
b12
b11
b10
b9
b8
b7
b6
b5
b4
b3
b2
b1
b0
—
—
—
POE8F
—
—
POE8E PIE3
—
—
—
—
—
—
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 request on the falling edge of POE8# pin input.
0 1: Accepts a request when POE8# pin input has been sampled
16 times at PCLK/8 clock pulses and all are low level.
1 0: Accepts a request when POE8# pin input has been sampled
16 times at PCLK/16 clock pulses and all are low level.
1 1: Accepts a request when POE8# pin input has been sampled
16 times at PCLK/128 clock pulses 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 3
0: Interrupt requests disabled
1: Interrupt requests enabled
R/W
b9
POE8 High-Impedance
Enable
0: Does not put the output in the high-impedance state by POE8#
signal.
1: Put the output in the high-impedance state by POE8# signal.
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