C8051F581-IMR Silicon Labs, C8051F581-IMR Datasheet - Page 111

• Manufacturer Part Number: C8051F581-IMR
• Description: 8-bit Microcontrollers - MCU 50MIPS 128kB 8kB SPI
• Manufacturer: Silicon Labs

Specifications of C8051F581-IMR

• Rohs: yes
• Core: 8051
• Processor Series: C8051
• Data Bus Width: 8 bit

On the execution of the RETI instruction in the CAN0 ISR, the value in SFRPAGE register is overwritten
with the contents of SFRNEXT. The CIP-51 may now access the SPI0DAT register as it did prior to the
interrupts occurring. See Figure 13.6.
SFRPAGE
SFRNEXT
SFRNEXT
popped to
SFRLAST
popped to
Figure 13.5. SFR Page Stack Upon Return From PCA Interrupt
(SPI0DAT)
stack on return from
popped off of the
(CAN0)
SFR Page 0x0
Automatically
0xC
0x0
interrupt
Rev. 1.2
C8051F58x/F59x
SFRPAGE
SFRNEXT
SFRLAST
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