RZ/A2M CPU Board RTK7921053C00000BE
2. Function specifications
R20UT4397EJ0100 Rev.1.00
2-23
2018.10.11
2.7
Clock Configuration
The following three types of clock are input to the RZ/A2M in RTK7921053C00000BE.
・
RZ/A2M input clock
：
24 MHz
・
RZ/A2M USB clock
：
48MHz
・
RZ/A2M RTC clock
：
32.768kHz
Figure 2.7.1 shows the clock configuration. Table 2.7.1 shows the function setting for the system settings DIP switches
SW1-1 and SW1-2.
Figure 2.7.1
Clock Configuration
Table 2.7.1
Function Setting for System Settings DIP Switch SW1-1 and SW1-2
DIP switch
function
ON
OFF
SW1-1
SSCG function OFF (Initial setting)
SSCG function ON
SW1-2
Sets EXTAL input peripheral frequency range from 10 to
12MHz.
(Setting prohibited)
Sets EXTAL input peripheral frequency
range from 20 to 24MHz. (Initial setting)
[Note] shows the setting functions to select.
RZ/A2M (U1)
32.768 kHz
(X3)
RTC_X1
RTC_X2
24 MHz
(X1)
EXTAL
XTAL
48 MHz
(X2)
USB_X1
USB_X2
NC
CKIO
PJ_6 /
LCD0_CLK
SD0_CLK
SD1_CLK
PJ_7 /
LCD0_EXTCLK
SCLK
microSD card slot (CN1)
PL_1 /
MD_CLK
L=10 to 12 MHz,
H=20 to 24 MHz
PL_0 /
MD_CLKS
L=SSCG:OFF, H=SSCG:ON
P6_4 /
AUDIO_CLK
P7_2 /
DV0_CLK
P4_6 /
TXCLKOUTP
P4_7 /
TXCLKOUTM
AUDIO_X1
AUDIO_X2
P6_1 /
VIO_CLK
Note:
Red characters
indicate
functions in use.
: Unmounted.
DIP
SW1-2
3.3 V
DIP
SW1-1
3.3 V
OFF
MUX
MUX
9
To SUB board
