ST72F264G2M6 STMicroelectronics, ST72F264G2M6 Datasheet - Page 33

• Manufacturer Part Number: ST72F264G2M6
• Description: IC MCU 8BIT 8K 28 SOIC
• Manufacturer: STMicroelectronics
• Series: ST7r

Specifications of ST72F264G2M6

• Core Processor: ST7
• Core Size: 8-Bit
• Speed: 16MHz
• Connectivity: I²C, SCI, SPI
• Peripherals: LVD, POR, PWM, WDT
• Number Of I /o: 22
• Program Memory Size: 8KB (8K x 8)
• Program Memory Type: FLASH
• Ram Size: 256 x 8
• Voltage - Supply (vcc/vdd): 2.7 V ~ 5.5 V
• Data Converters: A/D 6x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 28-SOIC (7.5mm Width)
• Processor Series: ST72F2x
• Core: ST7
• Data Bus Width: 8 bit
• Data Ram Size: 256 B
• Interface Type: I2C/SCI/SPI
• Maximum Clock Frequency: 8 MHz
• Number Of Programmable I/os: 22
• Number Of Timers: 3
• Operating Supply Voltage: 2.7 V to 5.5 V
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• Development Tools By Supplier: ST7F264-IND/USB, ST72F34X-SK/RAIS, ST7MDT10-DVP3, ST7MDT10-EMU3, STX-RLINK
• Minimum Operating Temperature: - 40 C
• On-chip Adc: 6-ch x 10-bit
• Controller Family/series: ST7
• No. Of I/o's: 22
• Ram Memory Size: 256Byte
• Cpu Speed: 8MHz
• No. Of Timers: 2
• Embedded Interface Type: I2C, SCI, SPI
• Rohs Compliant: Yes
• For Use With: 497-6423 - BOARD EVAL BASED ON ST72264G1497-5046 - KIT TOOL FOR ST7/UPSD/STR7 MCU
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant
• Other names: 497-2106-5

8 POWER SAVING MODES
8.1 INTRODUCTION
To give a large measure of flexibility to the applica-
tion in terms of power consumption, three main
power saving modes are implemented in the ST7
(see
After a RESET the normal operating mode is se-
lected by default (RUN mode). This mode drives
the device (CPU and embedded peripherals) by
means of a master clock which is based on the
main oscillator frequency divided by 2 (f
From Run mode, the different power saving
modes may be selected by setting the relevant
register bits or by calling the specific ST7 software
instruction whose action depends on the oscillator
status.
Figure 20. Power Saving Mode Transitions
Figure
20).
SLOW WAIT
POWER CONSUMPTION
SLOW
HALT
WAIT
RUN
Low
High
CPU
).
8.2 SLOW MODE
This mode has two targets:
– To reduce power consumption by decreasing the
– To adapt the internal clock frequency (f
SLOW mode is controlled by three bits in the
MISR1 register: the SMS bit which enables or dis-
ables Slow mode and two CPx bits which select
the internal slow frequency (f
In this mode, the oscillator frequency can be divid-
ed by 4, 8, 16 or 32 instead of 2 in normal operat-
ing mode. The CPU and peripherals are clocked at
this lower frequency.
Note: SLOW-WAIT mode is activated when enter-
ring the WAIT mode while the device is already in
SLOW mode.
Figure 21. SLOW Mode Clock Transitions
internal clock in the device,
the available supply voltage.
ST72260Gx, ST72262Gx, ST72264Gx
CP1:0
SMS
f
CPU
f
OSC2
f
FREQUENCY
OSC2
00
NEW SLOW
REQUEST
/2
01
CPU
f
OSC2
NORMAL RUN MODE
).
/4
REQUEST
CPU
f
OSC2
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) to