R01UH0822EJ0100 Rev.1.00
Page 530 of 1041
Jul 31, 2019
RX13T Group
20. Port Output Enable 3 (POE3C)
20.2
Register Descriptions
The POE registers are initialized by a reset.
20.2.1
Input Level Control/Status Register 1 (ICSR1)
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 ICSR1 register selects the POE0# pin input modes, controls the enable/disable of interrupts, and indicates status.
POE0M[1:0] Bits (POE0 Mode Select)
These bits select the input mode of the POE0# pin.
PIE1 Bit (Port Interrupt Enable 1)
This bit enables or disables interrupt requests when the POE0F flag is set to 1.
This flag indicates that a high-impedance request has been input to the POE0# pin.
[Setting condition]
When the input set by the POE0M[1:0] bits occurs at the POE0# pin
[Clearing condition]
By writing 0 to the POE0F flag after reading POE0F = 1
When low-level sampling is set by the POE0M[1:0] bits, the high level needs to be input to the POE0# pin to write
0 to this flag.
For details, refer to
section 20.3.7, Recover from High-Impedance State
.
Address(es): POE.ICSR1 0008 C4C0h
b15
b14
b13
b12
b11
b10
b9
b8
b7
b6
b5
b4
b3
b2
b1
b0
—
—
—
POE0F
—
—
—
PIE1
—
—
—
—
—
—
POE0M[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
POE0 Mode Select
b1 b0
0 0: Accepts a request on the falling edge of POE0# pin input.
0 1: Accepts a request when POE0# pin input has been sampled
16 times at PCLK/8 clock pulses and all are low level.
1 0: Accepts a request when POE0# pin input has been sampled
16 times at PCLK/16 clock pulses and all are low level.
1 1: Accepts a request when POE0# 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 1
0: Interrupt requests disabled
1: Interrupt requests enabled
R/W
b11 to b9
—
Reserved
These bits are read as 0. The write value should be 0.
R/W
b12
POE0 Flag
0: Indicates that a high-impedance request has not been input to
the POE0# pin.
1: Indicates that a high-impedance request has been input to the
POE0# pin.
R/(W)
*
b15 to b13 —
Reserved
These bits are read as 0. The write value should be 0.
R/W