Renesas Hitachi H8S/2191, Hardware Manual, Page: 35 / 1065

Rev. 2.0, 11/00, page 8 of 1037
1.3.2 Pin Functions
Table 1.2 summarizes the functions of the chip’s pins.
Table 1.2 Pin Functions
Type Symbol Pin No. I/O Name and Function
Vcc 45, 70,
82, 109 Input Power supply:
All Vcc pins should be connected to the system
power supply (+5V)
Vss 43, 68,
84, 111 Input Ground:
All Vss pins should be connected to the system
power supply (0V)
SVcc 9 Input Servo power supply:
SVcc pin should be connected to the servo
analog power supply (+5V)
SVss 2 Input Servo ground:
SVss pin should be connected to the servo
analog power supply (0V)
AVcc 10 Input Analog power supply:
Power supply pin for A/D converter. It should be
connected to the system power supply (+5V)
when the A/D converter is not used
Power
supply
AVss 23 Input Analog ground:
Ground pin for A/D converter. It should be
connected to the system power supply (0V)
OSC1 67 Input
OSC2 69 Output
Connected to a crystal oscillator. It can also
input an external clock. See section 10, Clock
Pulse Generator, for typical connection
diagrams for a crystal oscillator and external
clock input
X1 65 Input
Clock
X2 64 Output
Connected to a 32.768 kHz crystal oscillator.
See section 10, Clock Pulse Generator, for
typical connection diagrams
Operating
mode
control MD0 71 Input Mode pins:
These pins set the operating mode. These pins
should not be changed while the MCU is in
operation