HD6435348R Hitachi Semiconductor, HD6435348R Datasheet - Page 167
HD6435348R
Manufacturer Part Number
HD6435348R
Description
Single-Chip Microcomputer
Manufacturer
Hitachi Semiconductor
Datasheet
1.HD6435348R.pdf
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Table 9-4 Port 1 Pin Functions in Single-Chip Modes (cont)
Pin
P1
P1
P1
9.3 Port 2
9.3.1 Overview
Port 2 is a five-bit input/output port with the pin configuration shown in figure 9-2. It functions as
an input/output port only in the single-chip mode. In the expanded modes it is used for output of
bus control signals.
Outputs from port 2 can drive one TTL load and a 90 pF capacitive load. They can also drive a
Darlington transistor pair.
Port
2
1
0
2
/ E
/ ø
P2
P2
P2
P2
P2
Selection of Pin Functions
P1
Pin function
P1
Pin function
P1
Pin function
Pin
4
3
2
1
0
2
1
0
/ WR
/ RD
/ DS
/ R/W
/ AS
DDR
DDR
DDR
Figure 9-2 Pin Functions of Port 2
Expanded Modes
WR (output)
RD (output)
DS (output)
R/W (output)
AS (output)
Input
Input
Input
0
0
0
E clock output
ø clock output
Output
150
1
1
1
Single-Chip Mode
P2
P2
P2
P2
P2
4
3
2
1
0
(input/output)
(input/output)
(input/output)
(input/output)
(input/output)
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