ST7FLITE49K2T6TR STMicroelectronics, ST7FLITE49K2T6TR Datasheet - Page 38

• Manufacturer Part Number: ST7FLITE49K2T6TR
• Description: IC MCU 8BIT 8K FLASH 32LQFP
• Manufacturer: STMicroelectronics
• Series: ST7r

Specifications of ST7FLITE49K2T6TR

• Core Processor: ST7
• Core Size: 8-Bit
• Speed: 8MHz
• Connectivity: I²C, SPI
• Peripherals: LVD, POR, PWM, WDT
• Number Of I /o: 24
• Program Memory Size: 8KB (8K x 8)
• Program Memory Type: FLASH
• Eeprom Size: 256 x 8
• Ram Size: 384 x 8
• Voltage - Supply (vcc/vdd): 2.4 V ~ 5.5 V
• Data Converters: A/D 10x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 32-LQFP
• Processor Series: ST7FLITE4x
• Core: ST7
• Data Bus Width: 8 bit
• Data Ram Size: 384 B
• Interface Type: I2C, SPI
• Maximum Clock Frequency: 8 MHz
• Number Of Programmable I/os: 24
• Number Of Timers: 4
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• Development Tools By Supplier: ST7FLITE-SK/RAIS, ST7FLI49M-D/RAIS, STX-RLINK
• Minimum Operating Temperature: - 40 C
• On-chip Adc: 10 bit, 10 Channel
• For Use With: 497-8399 - BOARD EVAL ST7LITE49M/STLED316S497-5858 - EVAL BOARD PLAYBACK ST7FLITE
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Supply, reset and clock management
7
7.1
7.1.1
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Supply, reset and clock management
The device includes a range of utility features for securing the application in critical
situations (for example in case of a power brown-out), and reducing the number of external
components. The main features are the following:
●
●
●
RC oscillator adjustment
Internal RC oscillator
The device contains an internal RC oscillator with a specific accuracy for a given device,
temperature and voltage range (4.5 V - 5.5 V). It must be calibrated to obtain the frequency
required in the application. This is done by software writing a 10-bit calibration value in the
RCCR (RC Control register) and in the bits 6:5 in the SICSR (SI Control Status register).
Whenever the microcontroller is reset, the RCCR returns to its default value (FFh), i.e. each
time the device is reset, the calibration value must be loaded in the RCCR. Predefined
calibration values are stored in EEPROM for 3 and 5 V V
Table
Table 5.
RCCRH0
RCCRH1
RCCRL0
RCCRL1
Clock management
–
–
–
–
–
Reset Sequence Manager (RSM)
System Integrity management (SI)
–
–
5).
RCCR
8 MHz internal RC oscillator (enabled by option byte)
Auto-wakeup RC oscillator (enabled by option byte)
1 to 16 MHz or 32 kHz External crystal/ceramic resonator (selected by option byte)
External clock input (enabled by option byte)
For clock ART counter only: PLL32 for multiplying the 8 MHz frequency by 4
(enabled by option byte). The 8 MHz input frequency is mandatory and can be
obtained in the following ways:
- from 8-MHz internal RC oscillator
- from 16-MHz external crystal/ceramic resonator (divided internally by two by
default)
Main supply Low voltage detection (LVD) with reset generation (enabled by option
byte)
Auxiliary Voltage detector (AVD) with interrupt capability for monitoring the main
supply (enabled by option byte)
Predefined RC oscillator calibration values
f
f
V
Conditions
RC
RC
T
T
V
DD
A
A
DD
= 8 MHz
= 25°C
= 8 MHz
= 25°C
= 3.3 V
= 5V
DD
supply voltages at 25 °C (see
DEE0h
DEE1h
DEE2h
DEE3h
ST7LITE49K2
Address
(1)
(1)
(1)
(1)
(CR[9:2])
(CR[1:0])
(CR[9:2])
(CR[1:0])
ST7LITE49K2