22
Pin No.
Type
Symbol
FP-80A,
TFP-80C
CP-84,
CG-84
I/O
Name and Function
Host interface
(HIF) (H8/3337
Series only)
HDB
0
to
HDB
7
65 to 72
79 to 84,
1, 3
I/O
Host interface data bus:
8-bit
bidirectional bus by which a host
processor accesses the host interface.
CS
1
,
CS
2
76, 79
7, 10
I
Chip select 1 and 2:
Input pins for
selecting host interface channels 1 and
2.
IOR
77
8
I
I/O read:
Read strobe input pin for the
host interface.
IOW
78
9
I
I/O write:
Write strobe input pin for the
host interface.
HA
0
74
5
I
Command/data:
Input pin indicating
data access or command access.
GA
20
75
6
O
Gate A
20
: A
20
gate control signal output
pin.
HIRQ
1
HIRQ
11
HIRQ
12
KEYIN
0
to
KEYIN
7
43
42
44
56
55
57
O
Host interrupts 1, 11, and 12:
Output
pins for interrupt request signals to the
host processor.
Keyboard control
21 to 28
33 to 40
I
Keyboard input:
Input pins from a
matrix keyboard. (Keyboard scan
signals are normally output from P1
0
to
P1
and P2
to P2
, allowing a
maximum 16
×
8 key matrix. The
number of keys can be further
increased by use of other output
ports.)
Host interface
(if enabled when
STAC bit is 1 in
STCR) (H8/3337
Series only)
ECS
2
20
32
I
Host chip select 2:
Input pin for
selecting host interface channel 2.
EIOW
19
31
I
I/O write:
Write strobe input pin for the
host interface.
A/D converter
AN
7
to
AN
0
ADTRG
37 to 30
50 to 43
I
Analog input:
Analog signal input pins
for the A/D converter.
20
32
I
A/D trigger:
External
trigger input for
starting the A/D converter.
D/A converter
(H8/3337 Series
only)
DA
0
DA
1
36
37
49
50
O
Analog output:
Analog signal output
pins for the D/A converter.