p2125vps20 Renesas Electronics Corporation., p2125vps20 Datasheet - Page 196

• Manufacturer Part Number: p2125vps20
• Description: 16-bit Single-chip Microcomputer H8s Family / H8s/2100 Series
• Manufacturer: Renesas Electronics Corporation.

Section 8 I/O Ports
8.2.4
To ensure normal access to external space, P27 should not be set as an on-chip peripheral module
output pin when port 2 pins are used as address output pins.
• P27/A15/PW15/SCK1
• P26/A14/PW14/RxD1
Rev. 1.00 Sep. 21, 2006 Page 158 of 658
REJ09B0310-0100
Operating
Mode
CKE1
C/A
CKE0
P27DDR
OE15
IOSE
Pin
Function
Operating Mode Mode 1
RE
P26DDR
OE14
IOSE
Pin Function
The pin function is switched as shown below according to the combination of the IOSE bit in
SYSCR, the C/A bit in SMR of SCI_1, the CKE0 and CKE1 bits in SCR of SCI_1, the OE15
bit in PWOERB of PWM, the P27DDR bit, and operating mode.
The pin function is switched as shown below according to the combination of the IOSE bit in
SYSCR, the RE bit in SCR of SCI_1, the OE14 bit in PWOERB of PWM, the P26DDR bit,
and operating mode.
Mode 1
Pin Functions
output
A15
pin
—
—
—
—
—
—
input
P27
pin
—
—
output
0
A14
pin
—
—
—
—
output
A15
pin
0
input
P26
pin
0
0
—
—
0
Mode 2, 3 (EXPE = 1)
output
P27
pin
0
1
1
0
output
Mode 2, 3 (EXPE = 1)
A14
PW15
output
pin
0
pin
—
1
0
0
output
SCK1 output
P26
pins
—
—
—
1
1
1
pin
—
—
—
—
1
output
PW14
pin
—
1
SCK1
input
pin
—
—
—
—
—
1
RxD1
input
pin
—
—
—
1
input
P27
pin
—
0
output
input
P26
P27
pin
pin
—
0
0
0
Mode 2, 3 (EXPE = 0)
Mode 2, 3 (EXPE = 0)
0
1
PW15
output
pin
output
1
0
P26
pin
0
0
—
SCK1 output
—
—
—
1
1
PW14
output
pin
pin
1
—
—
—
1
RxD1
input
pin
SCK1
—
—
input
1
pin
—
—
—
—
1