C8051F902-GU Silicon Laboratories Inc, C8051F902-GU Datasheet - Page 146
![IC MCU 8BIT 8KB FLASH 24QSOP](/photos/12/15/121586/c8051f9xx_24-qsop_sml.jpg)
C8051F902-GU
Manufacturer Part Number
C8051F902-GU
Description
IC MCU 8BIT 8KB FLASH 24QSOP
Manufacturer
Silicon Laboratories Inc
Series
C8051F9xxr
Specifications of C8051F902-GU
Program Memory Type
FLASH
Program Memory Size
8KB (8K x 8)
Package / Case
24-QSOP
Core Processor
8051
Core Size
8-Bit
Speed
25MHz
Connectivity
SMBus (2-Wire/I²C), SPI, UART/USART
Peripherals
Brown-out Detect/Reset, POR, PWM, Temp Sensor, WDT
Number Of I /o
16
Ram Size
768 x 8
Voltage - Supply (vcc/vdd)
0.9 V ~ 3.6 V
Data Converters
A/D 15x10/12b
Oscillator Type
Internal
Operating Temperature
-40°C ~ 85°C
Processor Series
C8051F9x
Core
8051
Data Ram Size
768 B
Interface Type
UART
Maximum Clock Frequency
25 MHz
Number Of Timers
4
Operating Supply Voltage
0.9 V to 3.6 V
Maximum Operating Temperature
+ 85 C
Mounting Style
SMD/SMT
3rd Party Development Tools
PK51, CA51, A51, ULINK2
Development Tools By Supplier
C8051F912DK
Minimum Operating Temperature
- 40 C
On-chip Adc
12 bit
Package
24QSOP
Device Core
8051
Family Name
C8051F90x
Maximum Speed
25 MHz
Data Bus Width
8 Bit
Number Of Programmable I/os
16
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Eeprom Size
-
Lead Free Status / Rohs Status
Lead free / RoHS Compliant
Other names
336-1849-5
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
C8051F902-GU
Manufacturer:
SEMIKRON
Quantity:
45
Company:
Part Number:
C8051F902-GU
Manufacturer:
Silicon Laboratories Inc
Quantity:
135
- Current page: 146 of 318
- Download datasheet (3Mb)
C8051F91x-C8051F90x
14.4. Suspend Mode
Setting the Suspend Mode Select bit (PMU0CF.6) causes the system clock to be gated off and all internal
oscillators disabled. The system clock source must be set to the low power internal oscillator or the preci-
sion oscillator prior to entering suspend mode. All digital logic (timers, communication peripherals, inter-
rupts, CPU, etc.) stops functioning until one of the enabled wake-up sources occurs.
The following wake-up sources can be configured to wake the device from suspend mode:
Note: Upon wake-up from suspend mode, PMU0 requires two system clocks in order to update the PMU0CF wake-
In addition, a noise glitch on RST that is not long enough to reset the device will cause the device to exit
suspend. In order for the MCU to respond to the pin reset event, software must not place the device back
into suspend mode for a period of 15 µs. The PMU0CF register may be checked to determine if the wake-
up was due to a falling edge on the /RST pin. If the wake-up source is not due to a falling edge on RST,
there is no time restriction on how soon software may place the device back into suspend mode. A 4.7 kW
pullup resistor to VDD/DC+ is recommend for RST to prevent noise glitches from waking the device.
14.5. Sleep Mode
Setting the Sleep Mode Select bit (PMU0CF.6) turns off the internal 1.8 V regulator (VREG0) and switches
the power supply of all on-chip RAM to the VBAT pin (see Figure 14.1). Power to most digital logic on the
chip is disconnected; only PMU0 and the SmaRTClock remain powered. Analog peripherals remain pow-
ered in two-cell mode and lose their supply in one-cell mode because the dc-dc converter is disabled. In
two-cell mode, only the Comparators remain functional when the device enters sleep mode. All other ana-
log peripherals (ADC0, IREF0, External Oscillator, etc.) should be disabled prior to entering sleep mode.
The system clock source must be set to the low power internal oscillator or the precision oscillator prior to
entering sleep mode.
Note: When exiting sleep mode, 4 NOP instructions should be located immediately after the write to PMU0CF
Note: If the average active time (between successive entries into Sleep Mode) is less than 1 ms, peripherals
GPIO pins configured as digital outputs will retain their output state during sleep mode. In two-cell mode,
they will maintain the same current drive capability in sleep mode as they have in normal mode. In one-cell
mode, the VDD/DC+ supply will drop to the level of VBAT, which will reduce the output high-voltage level
and the source and sink current drive capability.
GPIO pins configured as digital inputs can be used during sleep mode as wakeup sources using the port
match feature. In two-cell mode, they will maintain the same input level specs in sleep mode as they have
in normal mode. In one-cell mode, the VDD supply will drop to the level of VBAT, which will lower the
switching threshold and increase the propagation delay.
C8051F912 and C8051F902 devices support a wakeup request for external devices. Upon exit from sleep
mode, the wake-up request signal is driven high, allowing other devices in the system to wake up from
their low power modes. An example of a system that may benefit from this function is one that uses a high-
power dc-dc converter (>65 mW of output power). The dc-dc converter may be disabled when the system
is asleep, and can be awoken by the wake-up request signal from the MCU. The wakeup request signal is
high when the MCU is awake and low when the MCU is asleep.
146
SmaRTClock Oscillator Fail
SmaRTClock Alarm
Port Match Event
Comparator0 Rising Edge
up flags. All flags will read back a value of '0' during the first two system clocks following a wake-up from
suspend mode.
that placed the device in sleep mode.
that may cause a wake-up from Sleep Mode (SmaRTClock, Port Match, and Comparator0) or are
enabled or configured in a way which may cause the wake-up flag to be set should be selected as
wake-up sources. If these peripherals are not selected as wake-up sources, then it is recommended to
bypass the Flash one-shot (FLSCL.6=1) before entering into Sleep Mode.
Rev. 1.0
Related parts for C8051F902-GU
Image
Part Number
Description
Manufacturer
Datasheet
Request
R
![500SAAB8M00000ACF](/images/manufacturer_photos/0/6/609/silicon_laboratories_inc_tmb.jpg)
Part Number:
Description:
SMD/C°/SINGLE-ENDED OUTPUT SILICON OSCILLATOR
Manufacturer:
Silicon Laboratories Inc
![SI3210MFT](/images/manufacturer_photos/0/6/609/silicon_laboratories_inc_tmb.jpg)
Part Number:
Description:
Manufacturer:
Silicon Laboratories Inc
Datasheet:
![4010-DAAKF_868](/images/manufacturer_photos/0/6/609/silicon_laboratories_inc_tmb.jpg)
Part Number:
Description:
N/A N/A/SI4010 AES KEYFOB DEMO WITH LCD RX
Manufacturer:
Silicon Laboratories Inc
Datasheet:
![4010-DASKF_868](/images/manufacturer_photos/0/6/609/silicon_laboratories_inc_tmb.jpg)
Part Number:
Description:
N/A N/A/SI4010 SIMPLIFIED KEY FOB DEMO WITH LED RX
Manufacturer:
Silicon Laboratories Inc
Datasheet:
![4432-SEB1 C 915](/images/manufacturer_photos/0/6/609/silicon_laboratories_inc_tmb.jpg)
Part Number:
Description:
N/A/-40 TO 85 OC/EZLINK MODULE; F930/4432 HIGH BAND (REV E/B1)
Manufacturer:
Silicon Laboratories Inc
![4432-SEB1 D 470](/images/manufacturer_photos/0/6/609/silicon_laboratories_inc_tmb.jpg)
Part Number:
Description:
EZLink Module; F930/4432 Low Band (rev e/B1)
Manufacturer:
Silicon Laboratories Inc
![4460-TCE10D434-EK](/images/manufacturer_photos/0/6/609/silicon_laboratories_inc_tmb.jpg)
Part Number:
Description:
I°/4460 10 DBM RADIO TEST CARD 434 MHZ
Manufacturer:
Silicon Laboratories Inc
![4461-TSQ14D868-EK](/images/manufacturer_photos/0/6/609/silicon_laboratories_inc_tmb.jpg)
Part Number:
Description:
I°/4461 14 DBM RADIO TEST CARD 868 MHZ
Manufacturer:
Silicon Laboratories Inc
![4463-TCE20C460-EK](/images/manufacturer_photos/0/6/609/silicon_laboratories_inc_tmb.jpg)
Part Number:
Description:
I°/4463 20 DBM RFSWITCH RADIO TEST CARD 460 MHZ
Manufacturer:
Silicon Laboratories Inc
![4463-TCE20C868-EK](/images/manufacturer_photos/0/6/609/silicon_laboratories_inc_tmb.jpg)
Part Number:
Description:
I°/4463 20 DBM RADIO TEST CARD 868 MHZ
Manufacturer:
Silicon Laboratories Inc
![4463-TCE27F868-EK](/images/manufacturer_photos/0/6/609/silicon_laboratories_inc_tmb.jpg)
Part Number:
Description:
I°/4463 27 DBM RADIO TEST CARD 868 MHZ
Manufacturer:
Silicon Laboratories Inc
![4463-TCE30E915S-EK](/images/manufacturer_photos/0/6/609/silicon_laboratories_inc_tmb.jpg)
Part Number:
Description:
I°/4463 SKYWORKS 30 DBM RADIO TEST CARD 915 MHZ
Manufacturer:
Silicon Laboratories Inc
![4463-TCE30E915R-EK](/images/manufacturer_photos/0/6/609/silicon_laboratories_inc_tmb.jpg)
Part Number:
Description:
N/A N/A/-40 TO 85 OC/4463 RFMD 30 DBM RADIO TEST CARD 915 MHZ
Manufacturer:
Silicon Laboratories Inc
![4463-TSQ20D169-EK](/images/manufacturer_photos/0/6/609/silicon_laboratories_inc_tmb.jpg)
Part Number:
Description:
I°/4463 20 DBM RADIO TEST CARD 169 MHZ
Manufacturer:
Silicon Laboratories Inc