ST72C334J2B6 STMicroelectronics, ST72C334J2B6 Datasheet - Page 36
ST72C334J2B6
Manufacturer Part Number
ST72C334J2B6
Description
8-bit Microcontrollers - MCU Flash 8K SPI/SCI
Manufacturer
STMicroelectronics
Datasheet
1.ST72C334J2B6.pdf
(153 pages)
Specifications of ST72C334J2B6
Product Category
8-bit Microcontrollers - MCU
Core
ST7
Data Bus Width
8 bit
Maximum Clock Frequency
8 MHz
Program Memory Size
8 KB
Data Ram Size
384 B
On-chip Adc
Yes
Operating Supply Voltage
3.2 V to 5.5 V
Package / Case
SDIP-42
Mounting Style
Through Hole
A/d Bit Size
8 bit
A/d Channels Available
8
Data Rom Size
256 B
Interface Type
SCI, SPI
Maximum Operating Temperature
+ 85 C
Minimum Operating Temperature
- 40 C
Number Of Programmable I/os
32
Number Of Timers
4 bit
Program Memory Type
Flash
Factory Pack Quantity
13
Supply Voltage - Max
5 V
Supply Voltage - Min
3.2 V
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
ST72C334J2B6
Manufacturer:
ST
Quantity:
507
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- Download datasheet (2Mb)
ST72334J/N, ST72314J/N, ST72124J
POWER SAVING MODES (Cont’d)
11.3 WAIT MODE
WAIT mode places the MCU in a low power con-
sumption mode by stopping the CPU.
This power saving mode is selected by calling the
‘WFI’ instruction.
All peripherals remain active. During WAIT mode,
the I bit of the CC register is cleared, to enable all
interrupts. All other registers and memory remain
unchanged. The MCU remains in WAIT mode until
an interrupt or RESET occurs, whereupon the Pro-
gram Counter branches to the starting address of
the interrupt or Reset service routine.
The MCU will remain in WAIT mode until a Reset
or an Interrupt occurs, causing it to wake up.
Refer to
36/153
Figure
21.
Figure 21. WAIT Mode Flow-chart
Note:
1. Before servicing an interrupt, the CC register is
pushed on the stack. The I bit of the CC register is
set during the interrupt routine and cleared when
the CC register is popped.
WFI INSTRUCTION
N
INTERRUPT
Y
OR SERVICE INTERRUPT
FETCH RESET VECTOR
4096 CPU CLOCK CYCLE
OSCILLATOR
PERIPHERALS
CPU
OSCILLATOR
PERIPHERALS
CPU
OSCILLATOR
PERIPHERALS
CPU
I BIT
I BIT
I BIT
N
DELAY
RESET
Y
OFF
OFF
X
ON
ON
ON
ON
ON
ON
ON
0
0
1)
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