ST7FLITEUS5B6 STMicroelectronics, ST7FLITEUS5B6 Datasheet - Page 28

• Manufacturer Part Number: ST7FLITEUS5B6
• Description: MCU 8BIT 1KB FLASH 128KB 8-DIP
• Manufacturer: STMicroelectronics
• Series: ST7r

Specifications of ST7FLITEUS5B6

• Core Processor: ST7
• Core Size: 8-Bit
• Speed: 8MHz
• Peripherals: LVD, POR, PWM, WDT
• Number Of I /o: 5
• Program Memory Size: 1KB (1K x 8)
• Program Memory Type: FLASH
• 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-DIP (0.300", 7.62mm)
• Controller Family/series: ST7
• No. Of I/o's: 5
• Ram Memory Size: 128Byte
• Cpu Speed: 8MHz
• No. Of Timers: 2
• Rohs Compliant: Yes
• For Use With: 497-6403 - BOARD EVAL 8BIT MICRO + TDE1708497-6407 - BOARD EVAL FOR VACUUM CLEANER497-5861 - EVAL BRD POWER MOSFET/8PIN MCU497-5858 - EVAL BOARD PLAYBACK ST7FLITE497-5515 - EVAL BOARD PHASE CTRL DIMMER497-5049 - KIT STARTER RAISONANCE ST7FLITE497-5046 - KIT TOOL FOR ST7/UPSD/STR7 MCU
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Connectivity: -
• Other names: 497-5636-5

Supply, reset and clock management
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6.1
6.2
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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.
Main features
●
●
●
Internal RC oscillator adjustment
The ST7 contains an internal RC oscillator with a specific accuracy for a given device,
temperature and voltage. It can be selected as the start up clock through the CKSEL[1:0]
option bits (see
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 Flash memory for 3.3 and 5 V V
as shown in the following table.
Table 5.
1. DEE0h, DEE1h, DEE2h and DEE3h are located in a reserved area butare special bytes containing also
RCCRH0
RCCRL0
RCCRH1
RCCRL1
the RC calibration values which are read-accessible only in user mode. If all the Flash space (including the
RC calibration value locations) has been erased (after the readout protection removal), then the RC
calibration values can still be obtained through these two addresses.
Clock management
–
–
Reset sequence manager (RSM)
System integrity management (SI)
–
–
RCCR
8 MHz internal RC oscillator (enabled by option byte)
External clock Input (enabled by option byte)
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
Predefined RC oscillator calibration values
Section 14.1 on page
V
T
f
V
T
f
RC
RC
A
A
DD
DD
=25 °C
=25 °C
=8 MHz
=8 MHz
=5 V
=3.3 V
Conditions
123). It must be calibrated to obtain the frequency
DEE0h
DEE1h
DEE2h
DEE3h
ST7LITEUS2/ST7LITEUS5 address
(1)
1)
1)
1)
(CR[9:2] bits)
(CR[1:0] bits)
(CR[9:2] bits)
(CR[1:0] bits)
DD
ST7LITEUS2, ST7LITEUS5
supply voltages at 25°C,