Renesas M32R/ECU Series User Manual page 26

1
Table 1.3.1 Description of Pin Functions (1/5)
Type Pin Name
Power supply VCCE
EXCVCC
VCC-BUS
VDDE
EXCVDD
VSS
Clock XIN,
XOUT
BCLK
OSC-VCC
OSC-VSS
VCNT
Reset RESET#
Mode MOD0,
MOD1
Flash protect FP
Address bus A11–A30
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."
Signal Name Input/Output Description
Main power supply –
Internal power supply –
Bus power supply –
RAM power supply –
Internal power –
supply of RAM
Ground –
Clock input Input
Clock output Output
System clock Output
Clock power supply –
Clock ground –
PLL control –
Reset Input
Mode Input
Flash protect Input
Address bus Output
Power supply for the device (5.0 V ± 0.5 V or 3.3 V ± 0.3 V).
This pin connects an external capacitor.
Power supply for the bus control pins (5.0 V ± 0.5 V or 3.3 V
± 0.3 V).
Backup power supply for the internal RAM (5.0 V ± 0.5 V or
3.3 V ± 0.3 V).
This pin connects an external capacitor for the internal power
supply of the internal RAM.
Connect all VSS pins to ground (GND).
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.)
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.
Power supply for the oscillator circuit. Connect OSC-VCC to
the main power supply.
Connect OSC-VSS to ground.
Connect a resistor and capacitor for control of the PLL circuit.
Reset input pin for the internal circuit.
Set the microcomputer's operation mode.
MOD0 MOD1 Mode
0 0 Single-chip mode
0 1 External extension mode
1 0 Processor mode
(Boot mode) (Note 1)
1 1 (Settings inhibited)
This special pin protects the flash memory against rewrites
in hardware.
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.
32180 Group User's Manual (Rev.1.0)
1-9
OVERVIEW
1.3 Pin Functions