
deveopmen
Appendix Standard Serial I/O Mode (Flash Memory Version)
Preliminary Specifications REV.B
Specifications in this manual are tentative and subject to change.
Mitsubishi microcomputers
M16C/80 (144-pin version) group
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
277
Pin functions (Flash memory standard serial I/O mode)
Pin
Description
V
CC
,V
SS
Apply 4.2V to 5.5V to Vcc pin and 0 V to Vss pin.
CNV
SS
Connect to Vcc pin.
RESET
Reset input pin. While reset is "L" level, a 20 cycle or longer clock
must be input to XIN pin.
X
IN
Connect a ceramic resonator or crystal oscillator between X
IN
and
X
OUT
pins. To input an externally generated clock, input it to X
IN
pin
and open X
OUT
pin.
X
OUT
BYTE
Connect this pin to Vcc or Vss.
AV
CC
, AV
SS
V
REF
Connect AVSS to Vss and AVcc to Vcc, respectively.
Enter the reference voltage for A-D converter from this pin.
P0
0
to P0
7
Input "H" or "L" level signal or open.
P1
0
to P1
7
Input "H" or "L" level signal or open.
P2
0
to P2
7
Input "H" or "L" level signal or open.
P3
0
to P3
7
Input "H" or "L" level signal or open.
P4
0
to P4
7
Input "H" or "L" level signal or open.
P5
1
to P5
4,
P5
6,
P5
7
Input "H" or "L" level signal or open.
P5
0
Input "H" level signal.
P5
5
Input "L" level signal.
P6
0
to P6
3
Input "H" or "L" level signal or open.
P6
4
P6
5
P6
6
Serial data input pin
P6
7
Serial data output pin
P7
0
to P7
7
Input "H" or "L" level signal or open.
P8
0
to P8
4
, P8
6
,
P8
7
P8
5
Input "H" or "L" level signal or open.
P9
0
to P9
7
Input "H" or "L" level signal or open.
P10
0
to P10
7
Input "H" or "L" level signal or open.
Name
Power input
CNV
SS
Reset input
Clock input
Clock output
BYTE
Analog power supply input
Reference voltage input
Input port P0
Input port P1
Input port P2
Input port P3
Input port P4
Input port P5
CE input
EPM input
Input port P6
BUSY output
SCLK input
RxD input
TxD output
Input port P7
Input port P8
Input port P9
Input port P10
I/O
I
I
I
O
I
I
I
I
I
I
I
I
I
I
I
O
I
I
O
I
I
I
I
NMI input
I
Connect this pin to Vcc.
I
P11
0
to P11
4
Input "H" or "L" level signal or open.
Input port P11
I
P12
0
to P12
7
Input "H" or "L" level signal or open.
Input port P12
I
P13
0
to P13
7
Input "H" or "L" level signal or open.
Input port P13
I
P14
0
to P14
6
Input "H" or "L" level signal or open.
Input port P14
I
P15
0
to P15
7
Input "H" or "L" level signal or open.
Input port P15
I
Standard serial mode 1: BUSY signal output pin
Standard serial mode 2: Monitors the program operation check
Standard serial mode 1: Serial clock input pin
Standard serial mode 2: Input "L" level signal.