Datasheet

Section 8 I/O Ports
Rev.7.00 Dec. 24, 2008 Page 236 of 698
REJ09B0074-0700
8.6.6 Pin Functions
Pin Functions of H8S/2218 Group
Port A pins also function as address bus (A19 to A16) output pins and SCI_2 I/O pins. The
correspondence between the register specification and the pin functions is shown below.
Table 8.29 PA3 Pin Function
Operating Mode Modes 4 to 6 Mode 7
AE3 to AE0 B'11×× Other than B'11×× —
CKE1 in SCR_2 — 0 1 0 1
C/A in SMR_2 — 0 1 — 0 1 —
CKE0 in SCR_2 — 0 1 — — 0 1 — —
PA3DDR — 0 1 — — — 0 1 — — —
Pin Function A19
output
pin
PA3
input
pin
PA3
output
pin
SCK2
output
pin
SCK2
output
pin
SCK2
input
pin
PA3
input
pin
PA3
output
pin
SCK2
output
pin
SCK2
output
pin
SCK2
input
pin
Table 8.30 PA2 Pin Function
Operating mode Modes 4 to 6 Mode 7
AE3 to AE0 B'1011 or
B'11
××
Other than B'1011 or B'11×× —
RE in SCR_2 — 0 1 0 1
PA2DDR — 0 1 — 0 1 —
Pin Function A18
output pin
PA2
input pin
PA2
output pin
RxD2
input pin
PA2
input pin
PA2
output pin
RxD2
input pin
Legend:
×: Don't care.