
29
Table 1-6
HD404318, HD404358 and HD404358R Series Pin Functions (cont)
Type
Symbol
I/O
Function
Port
D
0 to D8
I/O
High voltage D port (HD404318 Series): High voltage
I/O pins (PMOS open drain) that can be accessed in
1-bit units.
D port (HD404358 Series): Standard voltage I/O pins
(CMOS three state) that can be accessed in 1-bit units.
D port (HD404358R Series): Standard voltage I/O
pins (CMOS three state) that can be accessed in 1-bit
units. Pins D
5 to D8 are high-current pins (CMOS three
state) capable of handling current levels of up to 15
mA.
R0
0 to R03
I/O
R0 port: Standard voltage I/O pins (CMOS three state)
that can be accessed as a 4-bit unit.
R0 port (HD404358R Series): Standard voltage high
current I/O pins (CMOS three state) that can be
accessed as a 4-bit unit. Pins R0
0 to R03 are high -
current pins capable of handling current levels of up to
15 mA.
R1
0 to R13
I/O
High voltage R1 port (HD404318 Series): High
voltage I/O pins (PMOS open drain) that can be
accessed as a 4-bit unit.
R1 port (HD404358 Series): Standard voltage I/O pins
(CMOS three state) that can be accessed as a 4-bit
unit.
R1 port (HD404358R Series): Standard voltage high
current I/O pins that can be accessed as a 4-bit unit.
Pins R1
0 to R13 are high-current pins (CMOS three
state) capable of handling current levels of up to 15
mA.
R2
0 to R23
I/O
High voltage R2 port (HD404318 Series): High
voltage I/O pins (PMOS open drain) that can be
accessed as a 4-bit unit.
Medium voltage R2 port (HD404358 Series): Medium
voltage I/O pins (NMOS open drain) that can be
accessed as a 4-bit unit.
R2 port (HD404358R Series): Standard voltage high
current I/O pins that can be accessed as a 4-bit unit.
Pins R2
0 to R23 are high-current pins (CMOS three
state) capable of handling current levels of up to 15
mA.
R3
0 to R33
I/O
R3 port: Standard voltage I/O pins (CMOS three state)
that can be accessed as a 4-bit unit.
R4
0 to R43
I/O
R4 port: Standard voltage I/O pins (CMOS three state)
that can be accessed as a 4-bit unit.