EM357-RTR Datasheet, PDF (35/241 Pages) Silicon Laboratories – High-Performance, Integrated ZigBee/802.15.4 System-on-Chip

6. System Modules
System modules encompass power domains, resets, clocks, system timers, power management, and encryption.
Figure 6.1 shows these modules and how they interact.
REG_EN
VDD_PADS
recomended
connections for
internal regulator _{VREG_OUT}
VDD_MEM
External
Regulator
VDD_CORE
optional
connections for
external regulator
nRESET
JRST
Wakeup Recording
Power Management
Sleep Timer
VREG_1V25
Watchdog
always-on supply
POR HV
VREG_1V8
deep sleep
wakeup
watchdog
POR HV
Reset Filter
mem supply
POR LVmem
core supply
POR LVcore
SWJ
JTAG-TAP
CDBGRSTREQ
POR LV
CLK1K
CLK32K
OSCRC
DIV10
OSC32K
OSC32A
OSC32B
always-on domain
mem supply
Flash
mem domain
FLITF
always-on supply
RAM
ARM®
Cortex -M3
CPU
ARM®
Cortex -M3
Debug
core domain
Security Accelerator
PRESETHV
registers
PRESETLV
registers
AHB-AP
SYSCLK
OSCHF
OSC24M
OSCA
OSCB
Figure 6.1. System Module Block Diagram
Rev 1.3
35