C8051F040-TB Silicon Laboratories Inc, C8051F040-TB Datasheet - Page 140

• Manufacturer Part Number: C8051F040-TB
• Description: BOARD PROTOTYPING W/C8051F040
• Manufacturer: Silicon Laboratories Inc
• Type: MCUr

Specifications of C8051F040-TB

• Contents: Board
• Processor To Be Evaluated: C8051F04x
• Interface Type: USB
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• For Use With/related Products: C8051F040
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

C8051F040/1/2/3/4/5/6/7
On the execution of the RETI instruction in the ADC2 Window Comparator ISR, the value in SFRPAGE
register is overwritten with the contents of SFRNEXT. The CIP-51 may now access the Port 5 SFR bits as
it did prior to the interrupts occurring. See Figure 12.8 below.
140
Figure 12.7. SFR Page Stack Upon Return From PCA Interrupt
SFRNEXT
SFRLAST
SFRPAGE
popped to
SFRNEXT
popped to
stack on return from
popped off of the
SFR Page 0x00
(ADC2)
(Port 5)
Automatically
0x0F
0x02
interrupt
Rev. 1.5
SFRPAGE
SFRNEXT
SFRLAST