ST7FLITE49K2T6 STMicroelectronics, ST7FLITE49K2T6 Datasheet - Page 66

• Manufacturer Part Number: ST7FLITE49K2T6
• Description: IC MCU 8BIT 8K FLASH 32LQFP
• Manufacturer: STMicroelectronics
• Series: ST7r

Specifications of ST7FLITE49K2T6

• 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

Power saving modes
9.4.1
Caution:
66/245
Active-halt mode
Active-Halt mode is the lowest power consumption mode of the MCU with a real-time clock
available. It is entered by executing the ‘HALT’ instruction when Active-halt mode is enabled.
The MCU can exit Active-Halt mode on reception of a Lite timer/ AT timer interrupt or a
Reset.
●
●
When entering Active-Halt mode, the I bit in the CC register is cleared to enable interrupts.
Therefore, if an interrupt is pending, the MCU wakes up immediately.
In Active-Halt mode, only the main oscillator and the selected timer counter (LT/AT) are
running to keep a wakeup time base. All other peripherals are not clocked except those
which get their clock supply from another clock generator (such as external or auxiliary
oscillator).
As soon as Active-Halt is enabled, executing a HALT instruction while the Watchdog is
active does not generate a Reset if the WDGHALT bit is reset.
This means that the device cannot spend more than a defined delay in this power saving
mode.
Figure 27. Active-halt timing overview
1. This delay occurs only if the MCU exits Active-Halt mode by means of a RESET.
When exiting Active-Halt mode by means of a Reset, a 256 CPU cycle delay occurs.
After the start up delay, the CPU resumes operation by fetching the Reset vector which
woke it up (see
When exiting Active-Halt mode by means of an interrupt, the CPU immediately
resumes operation by servicing the interrupt vector which woke it up (see
[Active-halt Enabled]
Figure
28).
INSTRUCTION
RUN
HALT
ACTIVE
HALT
CYCLE DELAY
INTERRUPT
256 CPU
RESET
OR
1)
VECTOR
FETCH
RUN
ST7LITE49K2
Figure
28).