SH7125_08 Datasheet, PDF (411/774 Pages) Renesas Technology Corp – Renesas 32-Bit RISC Microcomputer SuperH™ RISC engine Family

Section 10 Port Output Enable (POE)
Initial
Bit
Bit Name value R/W Description
7 to 2 
All 0 R
Reserved
These bits are always read as 0. The write value should
always be 0.
1, 0 POE8M[1:0] 00
R/W*² POE8 mode 1 and 0
These bits select the input mode of the POE8 pin.
00: Accept request on falling edge of POE8 input
01: Accept request when POE8 input has been sampled
for 16 Pφ/8 clock pulses and all are low level.
10: Accept request when POE8 input has been sampled
for 16 Pφ/16 clock pulses and all are low level.
11: Accept request when POE8 input has been sampled
for 16 Pφ/128 clock pulses and all are low level.
Notes: 1. Writing 0 to this bit after reading it as 1 clears the flag and is the only allowed way.
2. Can be modified only once after a power-on reset.
10.3.4 Software Port Output Enable Register (SPOER)
SPOER is an 8-bit readable/writable register that controls high-impedance state of the pins.
Bit: 7
6
5
4
3
2
1
0
-
-
-
-
-
-
MTU2 MTU2
CH0HIZ CH34HIZ
Initial value: 0
0
0
0
0
0
0
0
R/W: R
R
R
R
R R/W R/W R/W
Bit Bit Name
7 to 3 —
2
—
Initial
value R/W Description
All 0
R
Reserved
These bits are always read as 0. The write value
should always be 0.
0
R/W Reserved
This bit is always read as 0. The write value should
always be 0.
Rev. 4.00 Jul. 25, 2008 Page 391 of 750
REJ09B0243-0400