ST92E163-EPB/US STMicroelectronics, ST92E163-EPB/US Datasheet - Page 80

• Manufacturer Part Number: ST92E163-EPB/US
• Description: KIT DEMO MASS STORAGE
• Manufacturer: STMicroelectronics
• Type: Microcontroller Programmerr

Specifications of ST92E163-EPB/US

• Contents: Programmer, Cable, Power Supply, Software, Manual and more
• For Use With/related Products: ST9 MCUs
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

ST92163R4 - RESET AND CLOCK CONTROL UNIT (RCCU)
Figure 38. Example of Low Power Mode programming
80/230
continued
Main code execution
Wait for the
PLL locking
(LOCK->1)
Interrupt
Interrupt
Routine
WAIT
WAIT
PROGRAM FLOW
CSU_CKSEL
WFI_CKSEL ← 1
User’s Program
CSU_CKSEL<- 1
CSU_CKSEL = 0
DX2-0 ← 001
CKAF_SEL <- 0
User’s Program
XTSTOP ← 1
LPOWFI ← 1
XTSTOP = 0
XTSTOP ← 0
MX(1:0) = 01
WFI status
DIV2 = 0
Begin
WFI
End
1
COMMENTS
Low Power Mode enabled
Multiplier divider’s factor set
CK_AF clock selected when WFI
To stop PLL and Xtal when
a WFI occurs
No code is executed until
the system clock
to 2, and PLL turned ON
The system CK
switches to Xtal
PLL is
system clock source
Interrupt served
To restart Xtal and PLL
Wait For Interrupt
an interrupt is requested
restart the PLL quickly
while the CK_AF is
The PLL is locked
and becomes the
system clock
Quartz not divided by 2
PLL multiply factor
Xtal is selected to
fixed to 6.
SET UP AFTER RESET PHASE:
** T
* T
1
2
= PLL lock-in time
= Quartz oscillator start-up time
SYSTEM CLOCK FREQUENCY
F
Q
=8 MHz, V
cc
T
T
=5 V and T=25°C
1
1
*
*
T
2
**
oscillator
oscillator
24 MHz
24 MHz
8 MHz
8 MHz
RC
RC