c8051f544 Silicon Laboratories, c8051f544 Datasheet - Page 94

• Manufacturer Part Number: c8051f544
• Description: Mixed Signal Isp Flash Mcu Family
• Manufacturer: Silicon Laboratories

C8051F54x
On the execution of the RETI instruction in the SPI0 ISR, the value in SFRPAGE register is overwritten
with the contents of SFRNEXT. The CIP-51 may now access the SMB0ADR register as it did prior to the
interrupts occurring. See Figure 12.6.
94
SFRPAGE
SFRNEXT
SFRNEXT
SFRLAST
popped to
popped to
Figure 12.5. SFR Page Stack Upon Return From PCA Interrupt
(SMB0ADR)
stack on return from
popped off of the
SFR Page 0x00
(SPI0)
Automatically
0x0F
0x00
interrupt
Rev. 1.0
SFRPAGE
SFRNEXT
SFRLAST