
Rev.3.01
REJ03B0158-0301
Aug 08, 2007
Page 86 of 134
38D5 Group
Table 20
Description of pin function (Flash Memory Standard Serial I/O Mode 1)
Pin name
Signal name
I/O
I
I
I
Function
V
CC
,V
SS
CNV
SS
Power supply
CNV
SS
Reset input
Apply 2.7 to 5.5 V to the V
CC
pin and 0 V to the Vss pin.
After input of port is set, input “H” level.
RESET
Reset input pin. To reset the microcomputer, RESET pin should be
held at an “L” level for 16 cycles or more of X
IN
.
Connect an oscillation circuit between the X
IN
and X
OUT
pins.
As for the connection method, refer to the “clock generating circuit”.
X
IN
X
OUT
AV
SS
V
REF
P0
0
P0
7
, P1
0
P1
7
,
P2
0
P2
7
, P3
0
P3
7
,
P4
0
P4
7
, P5
0
P5
7
,
P6
0
P6
7
, P7
2
P7
4
P4
0
P4
1
P4
2
P4
3
Clock input
Clock output
Analog power supply input
Reference voltage input
I/O port
I
O
Connect AVss to V
SS
.
Apply reference voltage of A/D convertor to this pin.
Input “L” or “H” level, or keep open.
I
I/O
RxD input
TxD output
S
CLK
input
BUSY output
I
Serial data input pin.
Serial data output pin.
Serial clock input pin.
BUSY signal output pin.
O
I
O
Table 21
Description of pin function (Flash Memory Standard Serial I/O Mode 2)
Pin name
Signal name
I/O
I
I
I
Function
V
CC
,V
SS
CNV
SS
RESET
Power supply
CNV
SS
Reset input
Apply 2.7 to 5.5 V to the Vcc pin and 0 V to the V
SS
pin.
After input of port is set, input “H” level.
Reset input pin. To reset the microcomputer, RESET pin should be
held at an “L” level for 16 cycles or more of X
IN
.
Connect an oscillation circuit between the X
IN
and X
OUT
pins.
As for the connection method, refer to the “clock generating circuit”.
X
IN
X
OUT
AV
SS
V
REF
P0
0
P0
7
, P1
0
P1
7
,
P2
0
P2
7
, P3
0
P3
7
,
P4
0
P4
7
, P5
0
P5
7
,
P6
0
P6
7
, P7
2
P7
4
P4
0
P4
1
P4
2
P4
3
Clock input
Clock output
Analog power supply input
Reference voltage input
I/O port
I
O
Connect AVss to V
SS
.
Apply reference voltage of A/D convertor to this pin.
Input “L” or “H” level, or keep open.
I
I/O
RxD input
TxD output
S
CLK
input
BUSY output
I
Serial data input pin.
Serial data output pin.
Input “L” level.
BUSY signal output pin.
O
I
O