SH7280 Datasheet, PDF (43/1726 Pages) Renesas Technology Corp – Renesas 32-Bit RISC Microcomputer SuperHTM RISC engine family

Section 1 Overview
1.4 Pin Functions
Table 1.2 lists functions of each pin.
Table 1.2 Pin Functions
Classification
Power supply
Clock
Symbol I/O Name
Function
VCC
Input
Power supply
Power supply pins. All the VCC pins
must be connected to the system
power supply. This LSI does not
operate correctly if there is a pin left
open.
VSS
Input Ground
Ground pins. All the VSS pins must be
connected to the system power supply
(0 V). This LSI does not operate
correctly if there is a pin left open.
VCL
Input Internal step- External capacitance pins for internal
down power step-down power supply. All the VCL
supply
pins must be connected to VSS via a
0.47-µF capacitor (should be placed
close to the pins).
PLLVSS
Input Ground for PLL Ground pin for the on-chip PLL
oscillator.
EXTAL
Input
External clock Connected to a crystal resonator.
An external clock signal may also be
input to the EXTAL pin.
XTAL
Output Crystal
Connected to a crystal resonator.
USBEXTAL Input Crystal for USB Connected to a resonator for the USB.
USBXTAL Output Crystal for USB Connected to a resonator for the USB.
CK
Output System clock Supplies the system clock to external
devices.
Rev. 1.00 Jun. 26, 2008 Page 13 of 1692
REJ09B0393-0100