Renesas RA4 Series User Manual

Renesas RA Microcontrollers EK-RA4M1 v1 – User's Manual
R20UT4579EU0100 Rev.1.00 Page 25 of 32
Oct.02.19
5.5.4 Pin Header J4
Pin Header J4 is a 2-column by 20-row through-hole pin header on 2.54 mm centers.
Table 15. Pin Header J4 Pin Assignment
100p RA4M1 Pin
RA4M1 Signal
J4 Pins
RA4M1 Signal
100p RA4M1
Pin
98
P002
1
2
P007
93
95
P005
3
4
(None)
NC
94
P006
5
6
P505
81
92
P008
7
8
P503
79
80
P504
9
10
P501
77
78
P502
11
12
(None)
NC
NC
(None)
13
14
(None)
NC
NC
(None)
15
16
(None)
NC
NC
(None)
17
18
(None)
NC
NC
(None)
19
20
(None)
NC
NC
(None)
21
22
(None)
NC
NC
(None)
23
24
(None)
NC
NC
(None)
25
26
(None)
NC
87
P012/VREFH
27
28
P013/VREFL
86
NC
(None)
29
30
(None)
NC
NC
(None)
31
32
(None)
NC
NC
(None)
33
34
(None)
NC
NC
(None)
35
36
VSS
12
15
VCC
37
38
(None)
NC
NC
(None)
39
40
(None)
NC
Color Key
Secondary Fixed Function pins
5.6 Additional Features
5.6.1 Analog Reference Voltages
Footprints for the installation of capacitors C21 and C23 are provided on the board. These
two capacitors provide noise-bypass capability for ports P010/P011 and for ports
P012/P013. See Figure 24 for the circuit design.
Port pair P010/P011 may be assigned as GPIO, where bypass capacitor C21 would
damage signal quality. When P010/P011 are to be assigned as VREFH0/VREFL0,
installation of the capacitor C21 can reduce reference voltage noise and improve ADC
measurement and DAC output quality. The board was designed for Samsung P/N CL10B104KB8NNNC, or
similar, noise-bypass capacitors.
Port pair P012/P013 may be assigned as GPIO, where bypass capacitor C23 would damage signal quality.
When P012/P013 are to be assigned as VREFH/VREFL, installation of capacitor C23 may reduce reference
voltage noise and improve ADC measurement and DAC output quality. The board was designed for
Samsung P/N CL10B104KB8NNNC, or similar noise-bypass capacitors.

Renesas RA4 Series Specifications

General

Brand	Renesas
Model	RA4 Series
Category	Motherboard
Language	English