BL602/604 Reference Manual
EXT_RST_N
ana_powb
reg_ctrl _pwron _rst
reg_ctrl _sys_reset
cpu_porst_n
reg_ctrl _cpu_reset
ana_ext_
pwr_
rst_n
wdt _rst_src_
n
cpu_rst_n
pwronrst_n
cpu_sys_rstreq_
n
efuse_cpu_rst_dis
~pds_misc_rst
Mux
Mux
Mux
Mux
Mux
hreset_n
~pds_cpu_rst
efuse_autoload_done
~pds_soc_rst
Sync
Sync
Sync
Sync
ana_pwrst_n
nwdt_hreset_n
Figure 2.1: Reset source
2.3 Clock source
Clock source contains:
• XTAL
：
External crystal clock, according to system requirements, the frequency can be selected from 24, 32, 38.4,
40MHz.
• XTAL32K
：
External crystal clock, frequency 32kHz
• RC32K
：
RC oscillator clock, 32kHz, provides calibration
• RC32M
：
RC oscillator clock, frequency 32MHz, provides calibration
• PLL
：
Phase-locked loop clock, internal system high-speed clock, the highest frequency supports 192MHz
The clock control unit distributes the clock from the oscillator to the core and peripheral devices. By selecting the
system clock source, dynamic frequency divider, clock configuration, sleep using 32KHz clock to achieve low power
clock management.
Peripheral clock includes: Flash
、
UART
、
I2C
、
SPI
、
PWM
、
IR-remote
、
ADC
、
DAC.
BL602/604 Reference Manual
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