C8051F120DK Silicon Laboratories Inc, C8051F120DK Datasheet - Page 140
![DEVKIT-F120/21/22/23/24/25/26/27](/photos/9/20/92070/c8051f120dk_sml.jpg)
C8051F120DK
Manufacturer Part Number
C8051F120DK
Description
DEVKIT-F120/21/22/23/24/25/26/27
Manufacturer
Silicon Laboratories Inc
Type
MCUr
Datasheet
1.C8051F120DK.pdf
(350 pages)
Specifications of C8051F120DK
Contents
Evaluation Board, Power Supply, USB Cables, Adapter and Documentation
Processor To Be Evaluated
C8051F12x and C8051F13x
Interface Type
USB
Silicon Manufacturer
Silicon Labs
Core Architecture
8051
Silicon Core Number
C8051F120
Silicon Family Name
C8051F12x
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
For Use With/related Products
C8051F120, 121, 122, 123, 124, 125, 126, 127
Lead Free Status / Rohs Status
Lead free / RoHS Compliant
Other names
336-1224
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
C8051F120DK
Manufacturer:
SiliconL
Quantity:
4
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C8051F120/1/2/3/4/5/6/7
C8051F130/1/2/3
On exit from the PCA interrupt service routine, the CIP-51 will return to the ADC2 Window Comparator
ISR. On execution of the RETI instruction, SFR Page 0x00 used to access the PCA registers will be auto-
matically popped off of the SFR Page Stack, and the contents of the SFRNEXT register will be moved to
the SFRPAGE register. Software in the ADC2 ISR can continue to access SFR’s as it did prior to the PCA
interrupt. Likewise, the contents of SFRLAST are moved to the SFRNEXT register. Recall this was the
SFR Page value 0x0F being used to access Port 5 before the ADC2 interrupt occurred. See Figure 11.8
below.
140
Figure 11.7. SFR Page Stack Upon PCA Interrupt Occurring During an ADC2 ISR
Figure 11.8. SFR Page Stack Upon Return From PCA Interrupt
SFRNEXT
SFRNEXT
SFRLAST
SFRLAST
SFRPAGE
popped to
SFRPAGE
SFRNEXT
pushed to
SFRNEXT
popped to
pushed to
stack on return from
SFRPAGE on PCA
pushed on stack in
popped off of the
SFR Page 0x00
(ADC2)
(Port 5)
SFR Page 0x00
(ADC2)
(Port 5)
Automatically
Automatically
(PCA)
0x0F
0x02
0x0F
0x00
0x02
interrupt
interrupt
Rev. 1.4
SFRPAGE
SFRNEXT
SFRPAGE
SFRLAST
SFRNEXT
SFRLAST
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