ST7FLITEUS5B6 STMicroelectronics, ST7FLITEUS5B6 Datasheet - Page 52

• 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

Power saving modes
8.4.2
52/136
Figure 22. Active-halt mode flowchart
1. This delay occurs only if the MCU exits Active-halt mode by means of a reset.
2. Peripherals clocked with an external clock source can still be active.
3. Only the Lite Timer RTC and AT Timer interrupts can exit the MCU from Active-halt mode.
4. Before servicing an interrupt, the CC register is pushed on the stack. The I bit of the CC register is set
Halt mode
The Halt mode is the lowest power consumption mode of the MCU. It is entered by
executing the ‘HALT’ instruction when Active-halt mode is disabled.
The MCU can exit Halt mode on reception of either a specific interrupt (see
Interrupt
the main oscillator is immediately turned on and the 64 CPU cycle delay is used to stabilize
it. After the start up delay, the CPU resumes operation by servicing the interrupt or by
fetching the reset vector which woke it up (see
When entering Halt mode, the I bit in the CC register is forced to 0 to enable interrupts.
Therefore, if an interrupt is pending, the MCU wakes immediately.
In Halt mode, the main oscillator is turned off causing all internal processing to be stopped,
including the operation of the on-chip peripherals. All peripherals are not clocked except the
ones which get their clock supply from another clock generator (such as an external or
auxiliary oscillator).
The compatibility of watchdog operation with Halt mode is configured by the “WDGHALT”
option bit of the option byte. The HALT instruction when executed while the watchdog
system is enabled, can generate a watchdog reset (see
details).
during the interrupt routine and cleared when the CC register is popped.
mapping) or a reset. When exiting Halt mode by means of a reset or an interrupt,
HALT INSTRUCTION
(Active-halt enabled)
N
INTERRUPT
Y
3)
OR SERVICE INTERRUPT
FETCH RESET VECTOR
64 CPU CLOCK CYCLE
OSCILLATOR
PERIPHERALS
CPU
OSCILLATOR
PERIPHERALS
CPU
OSCILLATOR
PERIPHERALS
CPU
I BIT
I BIT
I BITS
N
DELAY
RESET
Y
Figure
2)
2)
OFF
OFF
OFF
24).
ON
ON
ON
X
ON
ON
ON
X
0
4)
4)
Section 14.1: Option bytes
ST7LITEUS2, ST7LITEUS5
Table 9:
for more