h8s-2169 Renesas Electronics Corporation., h8s-2169 Datasheet - Page 280

• Manufacturer Part Number: h8s-2169
• Description: Renesas 16-bit Single-chip Microcomputer H8s Family/h8s/2100 Series
• Manufacturer: Renesas Electronics Corporation.

Section 8 I/O Ports
8.11.3
Port A pins also function as keyboard buffer controller I/O pins (PS2AC, PS2AD, PS2BC,
PS2BD, PS2CC, PS2CD), key-sense interrupt input pins (KIN15 to KIN8), expansion A/D
converter input pins (CIN15 to CIN8), and address output pins (A23 to A16). The port A pin
functions are shown in table 8.21.
Table 8.21 Port A Pin Functions
Pin
PA7/A23/PS2CD/
KIN15/CIN15
Rev. 3.00 Jan 18, 2006 page 252 of 1044
REJ09B0280-0300
Pin Functions
Selection Method and Pin Functions
The pin function is switched as shown below according to the combination of
operating mode, the KBIOE bit in KBCR2H of the keyboard buffer controller,
the IOSE bit in SYSCR, and bit PA7DDR.
When the IICS bit in STCR is set to 1, this pin functions as a bus buffer. This
pin can always be used as the PS2CD, KIN15, or CIN15 input pin.
Operating
mode
KBIOE
PA7DDR
IOSE
Pin function
Modes 1, 2 (EXPE = 0), 3
input
PA7
pin
—
0
KIN15 input pin, CIN15 input pin, PS2CD input pin
0
output
PA7
pin
—
1
PS2CD
output
pin
—
—
1
input
PA7
pin
—
0
Mode 2 (EXPE = 1)
output
A23
pin
0
0
1
output
PA7
pin
1
PS2CD
output
pin
—
—
1