HD64F2145 Datasheet, PDF (205/829 Pages) Renesas Technology Corp – Hitachi 16-Bit Single-Chip Microcomputer

8.3.4 Pin Functions
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/CBLANK
The pin function is switched as shown below according to the combination of the IOSE bit in
SYSCR, the CBOE bit in TCONRO of timer connection, the OE15 bit in PWOERB of PWM,
the P27DDR bit, and operating mode.
Operating
Mode
CBOE
P27DDR
OE15
IOSE
Pin
Function
Mode
1
—
—
—
—
A15
output
pin
0
—
—
P27
input
pin
Mode 2, 3 (EXPE = 1)
0
1
0
0
1
A15
output
pin
P27
output
pin
1
—
PW15
output
pin
1
—
—
—
CBLANK
output
pin
Mode 2, 3 (EXPE = 0)
0
—
—
P27
input
pin
0
1
0
1
—
—
P27
output
pin
PW15
output
pin
1
—
—
—
CBLANK
output
pin
• P26/A14/PW14, P25/A13/PW13, P24/A12/PW12
The pin function is switched as shown below according to the combination of the IOSE bit in
SYSCR, the OEm bit in PWOERB of PWM, the P2nDDR bit, and operating mode.
Operating
Mode
P2nDDR
OEm
IOSE
Pin Function
Legend
n = 6 to 4
m = 14 to 12
Mode
1
—
—
—
A14
to
A12
output
pins
Mode 2, 3 (EXPE = 1)
0
—
—
P26 to
P24 input
pins
1
0
0
1
A14 to
A12
output
pins
P26 to
P24
output
pins
1
—
PW14
to
PW12
output
pins
Mode 2, 3 (EXPE = 0)
0
—
—
P26 to
P24
input
pins
1
0
1
1
—
P26 to
P24
output
pins
PW14
to
PW12
output
pins
Rev. 2.0, 08/02, page 165 of 788