HD6433935 Hitachi, HD6433935 Datasheet - Page 166
HD6433935
Manufacturer Part Number
HD6433935
Description
8-Bit MICROCONTROLLER
Manufacturer
Hitachi
Datasheet
1.HD6433935.pdf
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8.5
Note: * P4
8.5.1
Port 4 is a 3-bit I/O port and 1-bit input internal port, configured as shown in figure 8-4. P4
is an internal function that performs interfacing to the FLEX™ decoder incorporated in the chip.
It cannot be connected to an IC outside the chip.
8.5.2
Table 8-11 shows the port 4 register configuration.
Table 8-11 Port 4 Registers
Name
Port data register 4
Port control register 4
154
Note:
Port 4*
Overview
Register Configuration and Description
Port 4
3
/IRQ
0
, only, is a chip internal input port.
: Connected inside the chip (P4
Figure 8-4 Port 4 Pin Configuration
P4
P4
P4
P4
Abbrev.
PDR4
PCR4
3
2
1
0
/IRQ
/TXD
/RXD
/SCK
0
32
32
32
3
only).
R/W
R/W
W
READY
Initial Value
H'F8
H'F8
decoder
FLEX™
Address
H'FFD7
H'FFE7
3
/IRQ
0
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