ST7LITEU09 STMicroelectronics, ST7LITEU09 Datasheet - Page 57

• Manufacturer Part Number: ST7LITEU09
• Description: ST7ULTRALITE - 8-BIT MCU WITH 2K SINGLE VOLTAGE FLASH MEMORY, ADC, TIMERS
• Manufacturer: STMicroelectronics

Specifications of ST7LITEU09

• 2k Bytes Single Voltage Flash Program Memory With Read-out Protection, In-circuit And In-application Programming (icp And Iap). 10k Write/erase Cycles Guaranteed, Data Retention: 20 years at 55°C
• 128 Bytes Data Eeprom. 300k Write/erase Cycles Guaranteed, Data Retention: 20 years at 55°C
• Clock Sources: internal trimmable 8MHz RC oscillator, internal low power, low frequency RC oscillator or external clock
• Five Power Saving Modes: Halt, Auto Wake Up from Halt, Active-Halt, Wait and Slow
• One 8-bit Lite Timer (lt) With Prescaler Including: watchdog, 1 realtime base and 1 input capture

ST7LITEU05 ST7LITEU09
mode. This connects f
f
Similarities with Halt mode
The following AWUFH mode behaviour is the same as normal Halt mode:
●
●
●
●
Figure 30. AWUF Halt timing diagram
AWU_RC
AWUFH interrupt
f
The MCU can exit AWUFH mode by means of any interrupt with exit from Halt
capability or a reset (see
When entering AWUFH mode, the I bit in the CC register is forced to 0 to enable
interrupts. Therefore, if an interrupt is pending, the MCU wakes up immediately.
In AWUFH mode, the main oscillator is turned off causing all internal processing to be
stopped, including the operation of the on-chip peripherals. None of the peripherals are
clocked except those which get their clock supply from another clock generator (such
as an external or auxiliary oscillator like the AWU oscillator).
The compatibility of watchdog operation with AWUFH mode is configured by the
WDGHALT option bit in the option byte. Depending on this setting, the HALT
instruction when executed while the watchdog system is enabled, can generate a
watchdog Reset.
f
AWU_RC
CPU
to be measured using the main oscillator clock as a reference timebase.
RUN MODE
AWU_RC
Section 9.4: Active-halt and Halt modes on page
to the input capture of the 8-bit lite timer, allowing the
HALT MODE
t
AWU
256 or 512 t
CPU
Power saving modes
RUN MODE
Clear
by software
53).
57/139