ST7FLITEU09M6TR STMicroelectronics, ST7FLITEU09M6TR Datasheet - Page 33

• Manufacturer Part Number: ST7FLITEU09M6TR
• Description: MCU 8BIT SGL VOLT FLASH SO-8
• Manufacturer: STMicroelectronics
• Series: ST7r

Specifications of ST7FLITEU09M6TR

• Core Processor: ST7
• Core Size: 8-Bit
• Speed: 8MHz
• Peripherals: LVD, POR, PWM, WDT
• Number Of I /o: 5
• Program Memory Size: 2KB (2K x 8)
• Program Memory Type: FLASH
• Eeprom Size: 128 x 8
• Ram Size: 128 x 8
• Voltage - Supply (vcc/vdd): 2.4 V ~ 5.5 V
• Data Converters: A/D 5x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 8-SOIC (3.9mm Width)
• Processor Series: ST7FLITEUx
• Core: ST7
• Data Bus Width: 8 bit
• Data Ram Size: 128 B
• Interface Type: ICC
• Maximum Clock Frequency: 8 MHz
• Number Of Programmable I/os: 5
• Number Of Timers: 2
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• Development Tools By Supplier: ST7FLITE-SK/RAIS, ST7FLITU0-D/RAIS, STX-RLINK
• Minimum Operating Temperature: - 40 C
• On-chip Adc: 10 bit, 5 Channel
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Connectivity: -
• Lead Free Status / Rohs Status: No

ST7LITEU05 ST7LITEU09
Note:
Caution:
Note:
1
2
3
In ICC mode, the internal RC oscillator is forced as a clock source, regardless of the
selection in the option byte. Refer to note 5 in
See “Electrical characteristics” on page 95. for more information on the frequency and
accuracy of the RC oscillator.
To improve clock stability and frequency accuracy, it is recommended to place a decoupling
capacitor, typically 100nF, between the V
device.
If the voltage or temperature conditions change in the application, the frequency may need
to be recalibrated.
Refer to application note AN2326 for information on how to calibrate the RC frequency using
an external reference signal.
The ST7ULTRALITE also contains an Auto Wake Up RC oscillator. This RC oscillator should
be enabled to enter Auto Wake-up from Halt mode.
The Auto-wakeup RC oscillator can also be configured as the startup clock through the
CKSEL[1:0] option bits (see
This is recommended for applications where very low power consumption is required.
Switching from one startup clock to another can be done in run mode as follows (see
Figure
Case 1: Switching from internal RC to AWU:
1.
2.
3.
4.
5.
Case 2: Switching from AWU RC to internal RC:
1.
2.
3.
4.
5.
When the internal RC is not selected, it is stopped so as to save power consumption.
When the internal RC is selected, the AWU RC is turned on by hardware when entering
Auto Wake-Up from Halt mode.
When the external clock is selected, the AWU RC oscillator is always on.
Set the RC/AWU bit in the CKCNTCSR register to enable the AWU RC oscillator
The RC_FLAG is cleared and the clock output is at 1.
Wait 3 AWU RC cycles till the AWU_FLAG is set
The switch to the AWU clock is made at the positive edge of the AWU clock signal
Once the switch is made, the internal RC is stopped
Reset the RC/AWU bit to enable the internal RC oscillator
Using a 4-bit counter, wait until 8 internal RC cycles have elapsed. The counter is
running on internal RC clock.
Wait till the AWU_FLAG is cleared (1AWU RC cycle) and the RC_FLAG is set (2 RC
cycles)
The switch to the internal RC clock is made at the positive edge of the internal RC clock
signal
Once the switch is made, the AWU RC is stopped
13):
Section 15.1 on page
DD
and V
Section 4.4 on page 20
SS
127).
Supply, reset and clock management
pins as close as possible to the ST7
for further details.
33/139