C8051F312-GQ Silicon Laboratories Inc, C8051F312-GQ Datasheet - Page 222
![IC 8051 MCU 8K FLASH 32LQFP](/photos/12/16/121654/c8051f312-gq_sml.jpg)
C8051F312-GQ
Manufacturer Part Number
C8051F312-GQ
Description
IC 8051 MCU 8K FLASH 32LQFP
Manufacturer
Silicon Laboratories Inc
Series
C8051F31xr
Specifications of C8051F312-GQ
Program Memory Type
FLASH
Program Memory Size
8KB (8K x 8)
Package / Case
32-LQFP
Core Processor
8051
Core Size
8-Bit
Speed
25MHz
Connectivity
SMBus (2-Wire/I²C), SPI, UART/USART
Peripherals
POR, PWM, Temp Sensor, WDT
Number Of I /o
29
Ram Size
1.25K x 8
Voltage - Supply (vcc/vdd)
2.7 V ~ 3.6 V
Data Converters
A/D 21x10b
Oscillator Type
Internal
Operating Temperature
-40°C ~ 85°C
Processor Series
C8051F3x
Core
8051
Data Bus Width
8 bit
Data Ram Size
1.25 KB
Interface Type
I2C, SMBus, SPI, UART
Maximum Clock Frequency
25 MHz
Number Of Programmable I/os
29
Number Of Timers
4 bit
Operating Supply Voltage
2.7 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
C8051F310DK
Minimum Operating Temperature
- 40 C
On-chip Adc
10 bit, 21 Channel
No. Of I/o's
29
Ram Memory Size
1280Byte
Cpu Speed
25MHz
No. Of Timers
4
Rohs Compliant
Yes
Package
32LQFP
Device Core
8051
Family Name
C8051F31x
Maximum Speed
25 MHz
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
For Use With
336-1445 - ADAPTER PROGRAM TOOLSTICK F310
Eeprom Size
-
Lead Free Status / Rohs Status
Lead free / RoHS Compliant
Other names
336-1255
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
C8051F312-GQ
Manufacturer:
Silicon Laboratories Inc
Quantity:
10 000
Company:
Part Number:
C8051F312-GQR
Manufacturer:
Silicon Laboratories Inc
Quantity:
10 000
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C8051F310/1/2/3/4/5/6/7
19.3. PCA Counter
On “REV A” devices, if the main PCA counter (PCA0H : PCA0L) overflows during the execution phase of a
read-modify-write instruction (bit-wise SETB or CLR, ANL, ORL, XRL) that targets the PCA0CN register,
the CF (Counter Overflow) bit will not be set. An example software work-around is as follows:
This behavior is not present on “REV B” and later devices. Software written for “REV A” devices will run on
“REV B” and later devices without modification.
222
Step 1. Disable global interrupts (EA = 0).
Step 2. Read PCA0L. This will latch the value of PCA0H.
Step 3. Read PCA0H, saving the value.
Step 4. Execute the bit-wise operation on CCFn (for example, CLR CCF0, or CCF0 = 0;).
Step 5. Read PCA0L.
Step 6. Read PCA0H, saving the value.
Step 7. If the value of PCA0H read in Step 3 is 0xFF and the value for PCA0H read in Step 6 is
Step 8. Re-enable interrupts (EA = 1).
0x00, then manually set the CF bit in software (for example, SETB CF, or CF = 1;).
Rev. 1.7
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