Pin Functions - Hitachi H8/3152 Hardware Manual

1.3.2

Pin Functions

Table 1.2 lists the functions of the H8/3150 series pins.
Table 1.2 Pin Functions
Type Symbol
Power supply V
CC
V
SS
Clock CLK
RES*
Reset
Ports I/O-1/IRQ*
I/O-2/IRQ*
Notes: 1. An input pull-up MOS is connected to the RES pin as shown in figure 1.4.
RES
2. The I/O-1/IRQ and I/O-2/IRQ pins can be used as I/O ports and interrupt input pins.
When these pins are not used, they must be left open.
Input pull-up MOS's are connected to these pins.
See section 9, I/O Ports, for I/O-1/IRQ and I/O-2/IRQ specification details.
I/O
I
I
I
1
I
2
I/O
2
I/O
V
CC
pin
Figure 1.4 Block Diagram of RES Pin
Name and Description
Power supply: 4.5 V to 5.5 V or 2.7 V to 3.3 V
Ground: 0 V
Clock: External clock input
Reset: Low input resets the chip.
I/O port 1: One-bit data input/output port. Software can
select input or output.
Interrupt: In sleep mode, this port can receive interrupt
input.
I/O port 2: One-bit data input/output port. Software can
select input or output.
Interrupt: In sleep mode, this port can receive interrupt
input.
Input pull-up MOS
Input buffer
Internal
RES signal
7