m37905 Renesas Electronics Corporation., m37905 Datasheet - Page 20

• Manufacturer Part Number: m37905
• Description: Mitsubishi 16-bit Single-chip Microcomputer 7700 Family / 7900 Series
• Manufacturer: Renesas Electronics Corporation.

1.3 Pin description
Tables 1.3.1 and 1.3.2 list the pin description.
Table 1.3.1 Pin description (1)
Vcc, Vss
MD0
MD1
RESET
X
X
V
AVcc
AVss
V
P1
P2
P4
P5
P5
P6
IN
OUT
CONT
REF
0
0
0
1
5
0
–P1
–P2
–P4
–P5
–P5
–P6
Pin
7
7
7
3
7
7
,
input
I/O port P4
I/O port P6
Power source input
MD0
MD1
Reset input
Clock input
Clock output
Filter circuit connection
Analog power source
Reference voltage input
I/O port P1
I/O port P2
I/O port P5
Name
Input/Output
Output
Input
Input
Input
Input
I/O
I/O
I/O
I/O
I/O
—
—
—
7905 Group User’s Manual Rev.1.0
Apply 5 V ± 0.5 V to pin Vcc and 0 V to pin Vss.
This pin switches the operating mode. This is only for the
single-chip mode, so connect this pin to V
The microcomputer is reset when “L” level is input to this pin.
Pins X
generating circuit, respectively. Connect these pins via a
ceramic resonator or a quartz-crystal oscillator. When an
external clock is input, this clock should be input to pin X
and pin X
To use the PLL frequency multiplier, be sure to connect this
pin to the filter circuit.
The power source input pin for the A-D converter. Connect this
pin to Vcc.
The power source input pin for the A-D and D-A converters.
Connect this pin to Vss.
This is the reference voltage input pin for the A-D and D-A converters.
P0 is an 8-bit CMOS I/O port and has an I/O direction register.
Each pin can function as an input or output port pin. By
software, these pins can function as I/O pins for serial I/O.
P2 is an 8-bit I/O port with the same function as port P1.
By software, these pins can function as I/O pins for timers
A4 and A9. Also, these pins can function as input pins for
timers B0 to B2.
P4 is an 8-bit I/O port with the same function as port P1.
By software, these pins can function as I/O pins for timers A5 to
A8, or as motor drive waveform output pins.
P5 is a 6-bit I/O port with the same function as port P1.
By software, these pins can function as input pins for timers B0
to B2, input pins for external interrupts, position data input pins
in the three-phrase waveform mode, or trigger input pins in the
pulse output port mode.
P6 is an 8-bit I/O port with the same function as port P1.
By software, these pins can function as I/O pins for timers A0 to
A3, or as motor drive waveform output pins.
IN
and X
OUT
should be left open.
OUT
are the input and output pins of the clock
Function
DESCRIPTION
1.3 Pin description
SS
.
1-5
IN
,