Renesas PROM Programming Adapter PCA7435FPG02 Spécifications Page 49

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7534 Group
Rev.3.00 Oct 23, 2006 page 49 of 53
REJ03B0099-0300
Fig. 53 Handling of VCC, USBVREFOUT pins of M37534M4-XXXFP, M37534E8FP
Description supplement for use of USB function stably
O
u
t
l
i
n
e
P
R
S
P
0
0
3
6
G
A
-
A
1
0
1
2
3
4
6
7
8
9
1
1
1
2
1
4
1
5
1
6
5
1
3
1
7
1
8
3
6
3
5
3
4
3
3
31
3
0
2
6
2
5
2
4
2
3
2
2
21
2
0
1
9
3
2
2
7
2
9
2
8
P00
C
N
VS
S
XO
U
T
XIN
VSS
P01
P02
P03
P04
P30(LED0)
V
c
c
V
R
E
F
P05
P10/RXD/D-
P
2
6/
A
N6
P27/AN7
P11/TXD/D+
P
1
2/
SC
L
K
P
13/
SD
A
T
A
P
23/
A
N3
P
22/
A
N2
P
21/
A
N1
P
20/
A
N0
P31(LED1)
P3
7/INT0
P24/AN4
P25/AN5
P06
P07
USBVREFOUT
RESET
M
3
7
5
3
4
M
4
-
X
X
X
F
P
M
3
7
5
3
4
E
8
F
P
P
14/
C
N
T
R0
P35(LED5)
P3
4(LED4)
P3
3(LED3)
P3
2(LED2)
1
.
5
k
Reason of is to reduce the effect by switcing noise of microcomputer to the
analog circuit generating USBV
REFOUT
output. Use the bigger capacitor and
connect to device at the shortest distance.
Reason of is to prevent the instability of the USBV
REFOUT
output due to
external noise.
Connect a capacitor to a device as
close as possible. For the capacitor,
a ceramic capacitor or an electrolytic
capacitor of 0.22 µF is recommended.
Connect a bypass capacitor to a device
as close as possible. For the capacitor,
a ceramic capacitor or an electrolytic
capacitor of 1.0 µF is recommended.
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