C8051F130 Silicon Laboratories Inc, C8051F130 Datasheet - Page 139
C8051F130
Manufacturer Part Number
C8051F130
Description
IC 8051 MCU 128K FLASH 100TQFP
Manufacturer
Silicon Laboratories Inc
Series
C8051F13xr
Specifications of C8051F130
Core Processor
8051
Core Size
8-Bit
Speed
100MHz
Connectivity
EBI/EMI, SMBus (2-Wire/I²C), SPI, UART/USART
Peripherals
Brown-out Detect/Reset, POR, PWM, Temp Sensor, WDT
Number Of I /o
64
Program Memory Size
128KB (128K x 8)
Program Memory Type
FLASH
Ram Size
8.25K x 8
Voltage - Supply (vcc/vdd)
3 V ~ 3.6 V
Data Converters
A/D 8x10b
Oscillator Type
Internal
Operating Temperature
-40°C ~ 85°C
Package / Case
100-TQFP, 100-VQFP
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
Eeprom Size
-
Other names
336-1147
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While in the ADC2 ISR, a PCA interrupt occurs. Recall the PCA interrupt is configured as a high priority
interrupt, while the ADC2 interrupt is configured as a low priority interrupt. Thus, the CIP-51 will now vector
to the high priority PCA ISR. Upon doing so, the CIP-51 will automatically place the SFR page needed to
access the PCA’s special function registers into the SFRPAGE register, SFR Page 0x00. The value that
was in the SFRPAGE register before the PCA interrupt (SFR Page 2 for ADC2) is pushed down the stack
into SFRNEXT. Likewise, the value that was in the SFRNEXT register before the PCA interrupt (in this
case SFR Page 0x0F for Port 5) is pushed down to the SFRLAST register, the “bottom” of the stack. Note
that a value stored in SFRLAST (via a previous software write to the SFRLAST register) will be overwritten.
See Figure 11.7 below.
Figure 11.6. SFR Page Stack After ADC2 Window Comparator Interrupt Occurs
SFRPAGE
SFRNEXT
pushed to
SFRPAGE on ADC2
pushed on stack in
SFR Page 0x02
(ADC2)
(Port 5)
Automatically
0x0F
0x02
interrupt
Rev. 1.4
C8051F120/1/2/3/4/5/6/7
C8051F130/1/2/3
SFRPAGE
SFRNEXT
SFRLAST
139
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