HD64F2638F20J Datasheet, PDF (306/1512 Pages) Renesas Technology Corp – Renesas 16-Bit Single-Chip Microcomputer H8S Family/H8S/2600 Series

Section 9 I/O Ports
H8S/2639, H8S/2638, H8S/2636,
H8S/2630, H8S/2635 Group
9.6.3 Pin Functions
Port A pins also function as SCI input/output pins (TxD2, RxD2, SCK2) and address bus output
pins (A19 to A16). Port A pin functions are shown in table 9-9.
Table 9-9 Port A Pin Functions
Pin
PA3/A19/SCK2
Selection Method and Pin Functions
The pin function is switched as shown below according to the operating mode,
bits AE3 to AE0 in PFCR, bit C/A in SMR and bits CKE0 and CKE1 in SCR of
SCI2, and bit PA3DDR.
Operating mode
Modes 4 to 6
AE3 to AE0
B'0000 to B'1011
B'1100 to B'1111
CKE1
C/A
0
1
—
0
1
—
—
CKE0
0
1
—
—
—
PA3DDR
0
1
—
—
—
—
Pin function
PA3 PA3 SCK2 SCK2 SCK2
input output output output input
A19 output
Operating mode
CKE1
C/A
CKE0
PA3DDR
Pin function
0
PA3
input
Mode 7
0
0
0
1
1
—
PA3
output
SCK2
output
1
—
—
SCK2
output
1
—
—
—
SCK2
input
Page 256 of 1458
REJ09B0103-0800 Rev. 8.00
May 28, 2010