h8s-2138 Renesas Electronics Corporation., h8s-2138 Datasheet - Page 72

• Manufacturer Part Number: h8s-2138
• Description: Renesas 16-bit Single-chip Microcomputer H8s Family/h8s/2100 Series
• Manufacturer: Renesas Electronics Corporation.

Section 1 Overview
1.3.3
Table 1.4 summarizes the functions of the H8S/2138 Group and H8S/2134 Group pins.
Table 1.4
Type
Power
supply
Clock
Rev. 4.00 Jun 06, 2006 page 18 of 1004
REJ09B0301-0400
Pin Functions
Pin Functions
Symbol
VCC1,
VCC2
VCL
VSS
XTAL
EXTAL
EXCL
Pin No.
FP-80A
TFP-80C
8 * , 47
8 *
12, 56, 73
2
3
14
14
I/O
Input
Input
Input
Input
Input
Output System clock: Supplies the system clock to
Input
Name and Function
Power supply: For connection to the power
supply. All VCC1 and VCC2 * pins should be
connected to the system power supply.
Internal step-down voltage pin: A power supply
pin for the product, applicable to product lines that
have an internal step-down voltage. In the 5-V and
4-V versions, connect external capacitors to
stabilize the internal step-down voltage between
this pin and the VSS pin. Do not connect it to Vcc.
In the 3-V version, connect this pin and the VCC1
pin to the power supply for the system. For details,
See Section 25, Electrical Characteristics.
Ground: For connection to the power supply (0 V).
All VSS pins should be connected to the system
power supply (0 V).
Connected to a crystal oscillator. See section 23,
Clock Pulse Generator, for typical connection
diagrams for a crystal oscillator and external clock
input.
can also input an external clock. See section 23,
Clock Pulse Generator, for typical connection
diagrams for a crystal oscillator and external clock
input.
external devices.
External subclock input: Input a 32.768 kHz
external subclock.
Connected to a crystal oscillator. The EXTAL pin