ST92T163R4T1 STMicroelectronics, ST92T163R4T1 Datasheet - Page 80

• Manufacturer Part Number: ST92T163R4T1
• Description: Microcontrollers (MCU) OTP EPROM 20K USB/I2
• Manufacturer: STMicroelectronics

Specifications of ST92T163R4T1

• Data Bus Width: 8 bit, 16 bit
• Program Memory Type: EPROM
• Program Memory Size: 20 KB
• Data Ram Size: 2 KB
• Interface Type: I2C, SCI, USB
• Maximum Clock Frequency: 24 MHz
• Number Of Programmable I/os: 64
• Number Of Timers: 2
• Operating Supply Voltage: 4 V to 5.5 V
• Maximum Operating Temperature: + 70 C
• Mounting Style: SMD/SMT
• Package / Case: TQFP-64
• Minimum Operating Temperature: 0 C
• On-chip Adc: 8 bit
• Lead Free Status / Rohs Status: No

ST92163 - RESET AND CLOCK CONTROL UNIT (RCCU)
Figure 38. Example of Low Power Mode programming
80/224
continued
Main code execution
Wait for the
PLL locking
(LOCK->1)
Interrupt
Interrupt
Routine
WAIT
WAIT
PROGRAM FLOW
CSU_CKSEL
WFI_CKSEL
User’s Program
CSU_CKSEL<- 1
CSU_CKSEL = 0
DX2-0
CKAF_SEL <- 0
User’s Program
XTSTOP
LPOWFI
XTSTOP = 0
XTSTOP
MX(1:0)
WFI status
DIV2
Begin
WFI
End
001
0
01
1
1
0
1
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
The system CK
switches to Xtal
to 2, and PLL turned ON
PLL is
system clock source
Interrupt served
To restart Xtal and PLL
Wait For Interrupt
an interrupt is requested
Quartz not divided by 2
restart the PLL quickly
PLL multiply factor
while the CK_AF is
The PLL is locked
and becomes the
system clock
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