Datasheet
R01DS0098EJ0180 Rev.1.80 Page 19 of 208
May 13, 2014
RX63N Group, RX631 Group 1. Overview
1.4 Pin Functions
Table 1.4 lists the pin functions.
Table 1.4 Pin Functions (1/6)
Classifications Pin Name I/O Description
Power supply VCC Input Power supply pin. Connect it to the system power supply.
Connect this pin to VSS via a 0.1-µF capacitor. The capacitor
should be placed close to the pin.
VCL Input Connect this pin to VSS via a 0.1-F capacitor. The capacitor
should be placed close to the pin.
VSS Input Ground pin. Connect it to the system power supply (0 V).
VBATT Input Backup power pin. When the battery backup function is not to
be used, connect it to the VCC pin.
Clock XTAL Output Pins for a crystal resonator. An external clock signal can be
input through the EXTAL pin.
EXTAL Input
BCLK Output Outputs the external bus clock for external devices.
SDCLK Output Outputs the clock dedicated for the SDRAM.
XCOUT Output Input/output pins for the subclock oscillator. Connect a crystal
resonator between XCOUT and XCIN.
XCIN Input
Operating mode control MD Input Pins for setting the operating mode. The signal levels on these
pins must not be changed during operation.
System control RES# Input Reset signal input pin. This LSI enters the reset state when this
signal goes low.
EMLE Input Input pin for the on-chip emulator enable signal. When the on-
chip emulator is used, this pin should be driven high. When not
used, it should be driven low.
BSCANP Input Boundary scan enable pin. Boundary scan is enabled when this
pin goes high. When not used, it should be driven low.
On-chip emulator FINEC Input Fine interface clock pin
FINED I/O Fine interface pin
TRST# Input On-chip emulator or boundary scan pins. When the EMLE pin is
driven high, these pins are dedicated for the on-chip emulator.
TMS Input
TDI Input
TCK Input
TDO Output
TRCLK Output This pin outputs the clock for synchronization with the trace
data.
TRSYNC Output This pin indicates that output from the TRDATA0 to TRDATA3
pins is valid.
TRDATA0 to TRDATA3 Output These pins output the trace information.
Address bus A0 to A23 Output Output pins for the address.
Data bus D0 to D31 I/O Input and output pins for the bidirectional data bus.
Multiplexed bus A0/D0 to A15/D15 I/O Address/data multiplexed bus