M13design M13-RA6M3-EK, User Manual, Page: 13 / 52

User Manual - Rev1.0.2 M13-RA6M3-EK pin assignment
M13design - 16 Dec. 21 13/53
3.1.3 CLOCK SOURCE
The M13-RA6M3-EK has 2 clock input sources as shown in Figure 7 and Table 6 gives you the
connections for each clock on the RA6M3.
- Main clock : 24MHz crystal
- RTC clock : 32.768KHz crystal
Table 6. Clock Source Assignment
U1 Pin RA6M3 Pin Functions
Board Function
Assignment
Signal Name
Default
Function
Remarks
24 EXTAL/P212 Main clock EXTAL Clock
23 XTAL/P213 Main clock XTAL Clock
20 XCIN RTC clock XCIN Clock
21 XCOUT RTC clock XCOUT Clock
Figure 7. Clock Source Diagram
EXTAL / P212
RA6M3
24
23
20
21
XTAL / P213
XCIN
XCOUT
C
8
9.
0p
F
C
9
9.
0p
F
C
10
18
pF
C
11
18
pF
R11
1M
R
10 3
K
3
1
2 4
3
X2
24Mhz
2 1
X1
32.678KHz