ST7FLITE35M6TR STMicroelectronics, ST7FLITE35M6TR Datasheet - Page 41
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ST7FLITE35M6TR
Manufacturer Part Number
ST7FLITE35M6TR
Description
IC MCU 8BIT 8K FLASH 20SOIC
Manufacturer
STMicroelectronics
Series
ST7r
Datasheet
1.ST7FLITE35F2M6TR.pdf
(173 pages)
Specifications of ST7FLITE35M6TR
Core Processor
ST7
Core Size
8-Bit
Speed
8MHz
Connectivity
LINSCI, SPI
Peripherals
LVD, POR, PWM, WDT
Number Of I /o
15
Program Memory Size
8KB (8K x 8)
Program Memory Type
FLASH
Ram Size
384 x 8
Voltage - Supply (vcc/vdd)
2.7 V ~ 5.5 V
Data Converters
A/D 7x10b
Oscillator Type
Internal
Operating Temperature
-40°C ~ 85°C
Package / Case
20-SOIC (7.5mm Width)
Processor Series
ST7FLITE3x
Core
ST7
Data Bus Width
8 bit
Development Tools By Supplier
ST7FLITE-SK/RAIS, ST7MDT10-DVP3, ST7MDT10-EMU3, STX-RLINK
For Use With
497-5858 - EVAL BOARD PLAYBACK ST7FLITE
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Eeprom Size
-
Lead Free Status / Rohs Status
Details
- Current page: 41 of 173
- Download datasheet (3Mb)
POWER SAVING MODES (Cont’d)
9.4 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 is disabled
(see
when the AWUEN bit in the AWUCSR register is
cleared.
The MCU can exit HALT mode on reception of ei-
ther a specific interrupt (see Table 6, “Interrupt
Mapping,” on page 36) or a RESET. When exiting
HALT mode by means of a RESET or an interrupt,
the oscillator is immediately turned on and the 256
CPU cycle delay is used to stabilize the oscillator.
After the start up delay, the CPU resumes opera-
tion by servicing the interrupt or by fetching the re-
set vector which woke it up (see
When entering HALT mode, the I bit in the CC reg-
ister is forced to 0 to enable interrupts. Therefore,
if an interrupt is pending, the MCU wakes up im-
mediately.
In HALT mode, the main oscillator is turned off
causing all internal processing to be stopped, in-
cluding 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 oscilla-
tor).
The compatibility of Watchdog operation with
HALT mode is configured by the “WDGHALT” op-
tion bit of the option byte. The HALT instruction
when executed while the Watchdog system is en-
abled, can generate a Watchdog RESET (see
tion 15.1 on page 161
Figure 24. HALT Timing Overview
[Active Halt disabled]
INSTRUCTION
RUN
section 9.5 on page 42
HALT
HALT
256 or 4096 CPU
CYCLE DELAY
INTERRUPT
for more details).
RESET
OR
for more details) and
Figure
VECTOR
FETCH
RUN
25).
sec-
Figure 25. HALT Mode Flow-chart
Notes:
1. WDGHALT is an option bit. See option byte sec-
tion for more details.
2. Peripheral clocked with an external clock source
can still be active.
3. Only some specific interrupts can exit the MCU
from HALT mode (such as external interrupt). Re-
fer to Table 6, “Interrupt Mapping,” on page 36 for
more details.
4. Before servicing an interrupt, the CC register is
pushed on the stack. The I bit of the CC register is
set during the interrupt routine and cleared when
the CC register is popped.
(AWUCSR.AWUEN=0)
HALT INSTRUCTION
(Active Halt disabled)
N
WATCHDOG
WDGHALT
RESET
1
INTERRUPT
Y
1)
3)
ENABLE
256 OR 4096 CPU CLOCK
OR SERVICE INTERRUPT
0
FETCH RESET VECTOR
OSCILLATOR
PERIPHERALS
CPU
I BIT
OSCILLATOR
PERIPHERALS
CPU
I BIT
OSCILLATOR
PERIPHERALS
CPU
I BIT
N
CYCLE
RESET
Y
WATCHDOG
ST7LITE3xF2
DELAY
DISABLE
2)
OFF
OFF
OFF
OFF
ON
ON
X
ON
ON
ON
X
0
4)
4)
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