Datasheet

Section 8 I/O Ports
Rev. 2.00 Aug. 20, 2008 Page 282 of 1198
REJ09B0403-0200
(4) Pin Functions
The relationship between the register settings and the pin function is shown below.
(a) Extended Mode (EXPE = 1)
• P27 to P24
The pin function is the same as that in single-chip mode.
• P23
The pin function is switched as shown below according to the combination of the CS256E and
IOSE bits in SYSCR, the ADFULLE bit in BCR2 of the BSC, and the P23DDR bit. Address
11 in the table below is expressed by the following logical expression.
Address 11 = 1: ADFULLE • CS256E • IOSE
P23DDR 0 1
ADMXE 0 1 0 1
Address 11 X X 0 1 X
Pin function P23 input pin AD11 input/output
pin
A11 output pin P23 output pin AD11 input/output
pin
• P22 to P20
P2nDDR 0 1
ADMXE 0 1 0 1
Pin function P2n input pin ADm input/output
pin
Am output pin ADm input/output
pin
[Legend] m = 10 to 8, n = 2 to 0, X: Don't care.