Pin Functions; Table 1.2 Pin Functions - Renesas H8S Series Hardware Manual

Section 1 Overview
1.3.3

Pin Functions

Table 1.2 Pin Functions
Type Symbol
Power VCC
supply
VCL
VSS
Clock XTAL
EXTAL
φ
EXCL
ExEXCL
X2
X1
Operating MD2 MD1
mode MD0
control
RES
System
control
RESO
STBY
FWE
Rev. 3.00 Jul. 14, 2005 Page 10 of 986
REJ09B0098-0300
Pin No. I/O
1, 36, Input
86
13 Input
7, 42, Input
95, 111,
139
143 Input
144 Input
18 Output
18 Input
16 Input
141 Input
140
25 Input
9
10
8 Input
142 Output
12 Input
26 Input
Name and Function
Power supply pins. Connect all these pins to the
system power supply. Connect the bypass
capacitor between VCC and VSS (near VCC).
External capacitance pin for internal step-down
power. Connect this pin to VSS through an
external capacitor (that is located near this pin) to
stabilize internal step-down power.
Ground pins. Connect all these pins to the system
power supply (0 V).
For connection to a crystal resonator. An external
clock can be supplied from the EXTAL pin. For an
example of crystal resonator connection, see
section 23, Clock Pulse Generator.
Supplies the system clock to external devices.
32.768-kHz external clock for sub clock should be
supplied. To which pin the external clock is input
can be selected from the EXCL and ExEXCL
pins.
These pins should be left open.
These pins set the operating mode. Inputs at
these pins should not be changed during
operation.
Reset pin. When this pin is low, the chip is reset.
Outputs a reset signal to an external device.
When this pin is low, a transition is made to
hardware standby mode.
Control pin for use by flash memory