C8051F047R Silicon Labs, C8051F047R Datasheet - Page 137
C8051F047R
Manufacturer Part Number
C8051F047R
Description
8-bit Microcontrollers - MCU 25 MIPS 32KB 10ADC
Manufacturer
Silicon Labs
Datasheet
1.C8051F044R.pdf
(328 pages)
Specifications of C8051F047R
Product Category
8-bit Microcontrollers - MCU
Core
8051
Data Bus Width
8 bit
Maximum Clock Frequency
25 MHz
Program Memory Size
32 KB
Data Ram Size
4.25 KB
On-chip Adc
Yes
Operating Supply Voltage
2.7 V to 3.6 V
Package / Case
TQFP-64
Mounting Style
SMD/SMT
A/d Bit Size
10 bit
A/d Channels Available
13
Data Rom Size
64 KB
Interface Type
CAN, SMBus, SPI, UART
Maximum Operating Temperature
+ 85 C
Minimum Operating Temperature
- 40 C
Number Of Programmable I/os
32
Number Of Timers
16 bit
Processor Series
C8051
Program Memory Type
Flash
Factory Pack Quantity
500
Supply Voltage - Max
3.6 V
Supply Voltage - Min
2.7 V
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C8051F040/1/2/3/4/5/6/7
SFR Page
Stack SFR's
0x0F
SFRPAGE
(Port 5)
SFRNEXT
SFRLAST
Figure 12.4. SFR Page Stack While Using SFR Page 0x0F To Access Port 5
While CIP-51 executes in-line code (writing values to Port 5 in this example), an ADC2 Window Compara-
tor Interrupt occurs. The CIP-51 vectors to the ADC2 Window Comparator ISR and pushes the current
SFR Page value (SFR Page 0x0F) into SFRNEXT in the SFR Page Stack. The SFR page needed to
access ADC2’s SFR’s is then automatically placed in the SFRPAGE register (SFR Page 0x02). SFRPAGE
is considered the “top” of the SFR Page Stack. Software can now access the ADC2 SFR’s. Software may
switch to any SFR Page by writing a new value to the SFRPAGE register at any time during the ADC2 ISR
to access SFR’s that are not on SFR Page 0x02. See Figure 12.5.
Rev. 1.5
137
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