OVERVIEW
1.3 Pin Functions
1
Table 1.3.1 Description of Pin Functions (1/5)
Type
Pin Name
VCCE
Signal Name
Input/Output Description
Power supply
Main power supply
–
Power supply for the device (5.0 V ± 0.5 V or 3.3 V ± 0.3 V).
This pin connects an external capacitor.
EXCVCC
VCC-BUS
Internal power supply –
Bus power supply
–
–
–
–
Power supply for the bus control pins (5.0 V ± 0.5 V or 3.3 V
± 0.3 V).
VDDE
EXCVDD
VSS
RAM power supply
Backup power supply for the internal RAM (5.0 V ± 0.5 V or
3.3 V ± 0.3 V).
Internal power
supply of RAM
This pin connects an external capacitor for the internal power
supply of the internal RAM.
Ground
Connect all VSS pins to ground (GND).
Clock
XIN,
Clock input
Input
These are clock input/output pins. A PLL-based ×8 frequency
multiplier is included, which accepts as input a clock whose
frequency is 1/8 of the internal CPU clock frequency. (XIN
input is 10 MHz when f(CPUCLK) = 80 MHz.)
XOUT
Clock output
Output
BCLK
System clock
Output
This pin outputs a clock whose frequency is twice that of the
external input clock (XIN). (BCLK output is 20 MHz when
f(CPUCLK) = 80 MHz.) Use this clock to synchronize the
operation of external devices.
OSC-VCC
Clock power supply
–
Power supply for the oscillator circuit. Connect OSC-VCC to
the main power supply.
OSC-VSS
VCNT
Clock ground
PLL control
Reset
–
Connect OSC-VSS to ground.
–
Connect a resistor and capacitor for control of the PLL circuit.
Reset input pin for the internal circuit.
Reset
Mode
RESET#
Input
Input
MOD0,
MOD1
Mode
Set the microcomputer’s operation mode.
MOD0 MOD1
Mode
0
0
1
0
1
0
Single-chip mode
External extension mode
Processor mode
(Boot mode) (Note 1)
(Settings inhibited)
1
1
Flash protect
Address bus
FP
Flash protect
Address bus
Input
This special pin protects the flash memory against rewrites
in hardware.
A11–A30
Output
Twenty address lines (A11–A30) are included, allowing four
blocks each up to 2 MB memory space to be connected
external to the chip. A31 is not output.
Note 1: Boot mode requires that the FP pin should be at the high level. For details about boot mode, see Chapter 6, “Internal
Memory.”
32180 Group User’s Manual (Rev.1.0)
1-9
RENESAS [ RENESAS TECHNOLOGY CORP ]
