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22
Table 1.4
Pin Functions (cont)
Pin No.
Type
Symbol
FP-80A
TFP-80C
I/O
Name and Function
Serial com-
munication
interface
TxD0
TxD1
TxD2
11
78
39
Output Transmit data: Data output pins.
(SCI0, SCI1,
SCI2)
RxD0
RxD1
RxD2
10
79
40
Input
Receive data: Data input pins.
SCK0
SCK1
SCK2
9
80
41
Input/
output
Serial clock: Clock input/output pins.
The SCK0 output type is NMOS push-pull.
(H8S/2138 Series only)
SCI with
IrDA (SCI2)
IrTxD
IrRxD
39
40
Output
Input
IrDA transmit data/receive data: Input and output
pins for data encoded for IrDA use.
Host
interface
HDB7 to
HDB0
72 to 65
Input/
output
Host interface data bus: Bidirectional 8-bit bus for
accessing the host interface.
(HIF)
&6,
(&6
15, 75, 20
Input
Chip select 1 and 2: Input pins for selecting host
interface channel 1 or 2.
,25
17
Input
I/O read: Input pin that enables reading from the
host interface.
,2:
16
Input
I/O write: Input pin that enables writing to the host
interface.
HA0
74
Input
Command/data: Input pin that indicates whether
an access is a data access or command access.
GA20
75
Output GATE A20: A20 gate control signal output pin.
HIRQ11
HIRQ1
HIRQ12
42
43
44
Output Host interrupt 11, 1, and 12: Output pins for
interrupt requests to the host.
HIFSD
76
Input
to place host interface input/output pins in the high-
impedance/cutoff state.
Keyboard
control
.,1 to
.,1
21 to 24,
25 to 28
Input
Keyboard input: Matrix keyboard input pins.
Normally, P10 to P17 and P20 to P27 are used as
key-scan outputs. This enables a maximum 16-
output
× 16-input, 256-key matrix to be configured.