C8051F502-IMR Silicon Laboratories Inc, C8051F502-IMR Datasheet - Page 105

• Manufacturer Part Number: C8051F502-IMR
• Description: MCU 8-Bit C8051F50x 8051 CISC 64KB Flash 2.5V/3.3V/5V 32-Pin QFN EP T/R
• Manufacturer: Silicon Laboratories Inc

Specifications of C8051F502-IMR

• Package: 32QFN EP
• Device Core: 8051
• Family Name: C8051F50x
• Maximum Speed: 50 MHz
• Ram Size: 4.25 KB
• Program Memory Size: 64 KB
• Operating Supply Voltage: 2.5|3.3|5 V
• Data Bus Width: 8 Bit
• Program Memory Type: Flash
• Number Of Programmable I/os: 25
• Interface Type: I2C/SPI/UART
• On-chip Adc: 32-chx12-bit
• Operating Temperature: -40 to 125 °C
• Number Of Timers: 4

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
C8051F50x/F51x
SFRPAGE
SFRNEXT
SFRLAST
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