HD6433044 Hitachi Semiconductor, HD6433044 Datasheet - Page 259

• Manufacturer Part Number: HD6433044
• Description: (HD64 Series) Hitachi Single-Chip Microcomputer
• Manufacturer: Hitachi Semiconductor

Table 9-1 Port Functions (cont)
Port
Port B
9.2 Port 1
9.2.1 Overview
Port 1 is an 8-bit input/output port with the pin configuration shown in figure 9-1. The pin
functions differ between the expanded modes with on-chip ROM disabled, expanded modes with
on-chip ROM enabled, and single-chip mode. In modes 1 to 4 (expanded modes with on-chip
ROM disabled), they are address bus output pins (A
In modes 5 and 6 (expanded modes with on-chip ROM enabled), settings in the port 1 data
direction register (P1DDR) can designate pins for address bus output (A
In mode 7 (single-chip mode), port 1 is a generic input/output port.
When DRAM is connected to area 3, A
cycles. For details see section 7, Refresh Controller.
Pins in port 1 can drive one TTL load and a 90-pF capacitive load. They can also drive a
darlington transistor pair.
• 8-bit I/O port
• Can drive LEDs
• PB
Description
have Schmitt
inputs
Port 1
3
to PB
0
Pins
PB
TOCXB
PB
TOCXA
PB
PB
PB
PB
Port 1 pins
P1 /A
P1 /A
P1 /A
P1 /A
P1 /A
P1 /A
P1 /A
P1 /A
5
4
3
2
1
0
/TP
/TP
/TP
/TP
/TP
/TP
7
6
5
4
3
2
1
0
13
12
11
10
9
8
4
4
/TIOCB
/TIOCA
Figure 9-1 Port 1 Pin Configuration
,
,
/TIOCB
/
/
/TIOCA
7
6
5
4
3
2
1
0
3
3
Modes 1 to 4
A (output)
A (output)
A (output)
A (output)
A (output)
A (output)
A (output)
A (output)
4
4
,
,
,
Mode 1 Mode 2 Mode 3 Mode 4 Mode 5
TPC output (TP
TIOCB
7
6
5
4
3
2
1
0
7
to A
4
, TIOCA
0
output row and column addresses in read and write
246
13
4
, TIOCB
7
Modes 5 and 6
P1 (input)/A (output)
P1 (input)/A (output)
P1 (input)/A (output)
P1 (input)/A (output)
P1 (input)/A (output)
P1 (input)/A (output)
P1 (input)/A (output)
P1 (input)/A (output)
to TP
to A
7
6
5
4
3
2
1
0
8
), ITU input and output (TOCXB
3
0
, TIOCA
).
7
6
5
4
3
2
1
0
3
), and generic input/output
7
to A
Mode 7
P1 (input/output)
P1 (input/output)
P1 (input/output)
P1 (input/output)
P1 (input/output)
P1 (input/output)
P1 (input/output)
P1 (input/output)
7
6
5
4
3
2
1
0
0
) or generic input.
Mode 6
4
, TOCXA
4
,
Mode 7