ST7FLITE39F2M3TR STMicroelectronics, ST7FLITE39F2M3TR Datasheet - Page 46

• Manufacturer Part Number: ST7FLITE39F2M3TR
• Description: IC MCU 8BIT 8K FLASH 20SOIC
• Manufacturer: STMicroelectronics
• Series: ST7r

Specifications of ST7FLITE39F2M3TR

• Core Processor: ST7
• Core Size: 8-Bit
• Speed: 16MHz
• Connectivity: LINSCI, SPI
• Peripherals: LVD, POR, PWM, WDT
• Number Of I /o: 15
• 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): 2.7 V ~ 5.5 V
• Data Converters: A/D 7x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 125°C
• Package / Case: 20-SOIC (7.5mm Width)
• For Use With: 497-8406 - BOARD STF20NM50FD/STF7LITE39BF2497-8403 - BOARD DEMO STCC08 AC SW DETECTOR497-5858 - EVAL BOARD PLAYBACK ST7FLITE497-5049 - KIT STARTER RAISONANCE ST7FLITE
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

ST7LITE3xF2
POWER SAVING MODES (Cont’d)
9.6.0.1 Register Description
AWUFH CONTROL/STATUS REGISTER
(AWUCSR)
Read/Write
Reset Value: 0000 0000 (00h)
Bits 7:3 = Reserved.
Bit 1= AWUF Auto Wake Up Flag
This bit is set by hardware when the AWU module
generates an interrupt and cleared by software on
reading AWUCSR. Writing to this bit does not
change its value.
0: No AWU interrupt occurred
1: AWU interrupt occurred
Bit 2= AWUM Auto Wake Up Measurement
This bit enables the AWU RC oscillator and con-
nects its output to the input capture of the 12-bit
auto-reload timer. This allows the timer to be used
to measure the AWU RC oscillator dispersion and
then compensate this dispersion by providing the
right value in the AWUPR register.
0: Measurement disabled
1: Measurement enabled
Bit 0 = AWUEN Auto Wake Up From Halt Enabled
This bit enables the Auto Wake Up From Halt fea-
ture: once HALT mode is entered, the AWUFH
wakes up the microcontroller after a time delay de-
pendent on the AWU prescaler value. It is set and
cleared by software.
0: AWUFH (Auto Wake Up From Halt) mode disa-
1: AWUFH (Auto Wake Up From Halt) mode ena-
Table 8. AWU Register Map and Reset Values
46/173
1
Address
7
0
bled
bled
004Ah
(Hex.)
0049h
0
AWUPR
Reset Value
AWUCSR
Reset Value
0
Register
Label
0
0
AWUPR7
AWUF AWUM AWUEN
7
1
0
AWUPR6
6
1
0
AWUPR5
0
5
1
0
AWUFH PRESCALER REGISTER (AWUPR)
Read/Write
Reset Value: 1111 1111 (FFh)
Bits 7:0= AWUPR[7:0] Auto Wake Up Prescaler
These 8 bits define the AWUPR Dividing factor (as
explained below
In AWU mode, the period that the MCU stays in
Halt Mode (t
fined by
This prescaler register can be programmed to
modify the time that the MCU stays in Halt mode
before waking up automatically.
Note: If 00h is written to AWUPR, depending on
the product, an interrupt is generated immediately
after a HALT instruction, or the AWUPR remains
unchanged.
AWU
AWUPR4
PR7
7
AWUPR[7:0
4
1
0
t
AWU
FEh
FFh
00h
01h
AWU
PR6
...
AWUPR3
=
AWU
AWU
PR5
]
64
3
1
0
×
AWUPR
in
AWU
PR4
Figure 29 on page
AWUPR2
AWUF
2
1
×
AWU
PR3
------------------------- -
f
Dividing factor
AWURC
Forbidden
1
AWUPR1
AWU
254
255
AWUM
PR2
...
1
+
1
1
t
RCSTRT
AWU
PR1
44) is de-
AWUPR0
AWUEN
AWU
0
1
PR0
0