Table 217. Clock Input Sources - STMicroelectronics SPC572L series Reference Manual

RM0400
CLKMT0_RMN (IRCOSC)
CLKMN0_RMT (XOSC)
(from MC_ME)
CLKMN0_RMT_ACTIVE
CLKMN1
(monitored clock)
CLKMN1_ACTIVE
(from MC_ME)
21.7.1.1 Clock input sources
Table 217
internally on the chip, but are not accessible via pins on the boundary of the device.
IRCOSC is the reference clock the clock monitor. Only CMU0 implements the XOSC
monitor. CMU0 uses the IRCOSC clock to measure if the XOSC is too low. CMU0 can also
be used to calibrate the IRCOSC frequency using the XOSC.
Clock
module
CMU0
21.7.1.2 CMU registers availability
Table 218
Figure 168. CMU0 block diagram
CMU_CSR[CKSEL1]
CLK_SEL
01
N/A
10
N/A
00,11
CLKMN0_RMT Supervisor
f < f
CLKMN0_RMT
CLKMN1 Supervisor
Fixed
Prescaler
/4
f
CLKMN1
f
CLKMN1
shows the clocks that are monitored by the CMU. These signals are connected

Table 217. Clock input sources

specifies the CMU registers available on this device.
DocID027809 Rev 4
CMU_MDR
Frequency Meter
RCDIV
/ 2
CLKMT0_RMN
CMU_HREF
> hfref
< lfref
CMU_LFREF
Monitored clock
PLL0:PHI, XOSC, IRCOSC
CMU_FDR
Clocking
OLR
FHH
FLL
475/2058
477