C8051F572-IMR Silicon Labs, C8051F572-IMR Datasheet - Page 97
C8051F572-IMR
Manufacturer Part Number
C8051F572-IMR
Description
8-bit Microcontrollers - MCU 50 MIPS 16 kB 2 kB CAN2.0 LIN 2.1 SPI
Manufacturer
Silicon Labs
Datasheet
1.C8051F556-IMR.pdf
(302 pages)
Specifications of C8051F572-IMR
Rohs
yes
Core
8051
Data Bus Width
8 bit
Processor Series
C8051
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- Download datasheet (2Mb)
C8051F55x/56x/57x
12.3. SFR Page Stack Example
The following is an example that shows the operation of the SFR Page Stack during interrupts. In this
example, the SFR Control register is left in the default enabled state (i.e., SFRPGEN = 1), and the CIP-51
is executing in-line code that is writing values to SPI Data Register (SFR “SPI0DAT”, located at address
0xA3 on SFR Page 0x00). The device is also using the CAN peripheral (CAN0) and the Programmable
Counter Array (PCA0) peripheral to generate a PWM output. The PCA is timing a critical control function in
its interrupt service and so its associated ISR that is set to high priority. At this point, the SFR page is set to
access the SPI0DAT SFR (SFRPAGE = 0x00). See Figure 12.2.
SFR Page
Stack SFR's
0x0
SFRPAGE
(SPI0DAT)
SFRNEXT
SFRLAST
Figure 12.2. SFR Page Stack While Using SFR Page 0x0 To Access SPI0DAT
Rev. 1.1
97
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