C8051F061 Silicon Laboratories Inc, C8051F061 Datasheet - Page 134
C8051F061
Manufacturer Part Number
C8051F061
Description
IC 8051 MCU 64K FLASH 64TQFP
Manufacturer
Silicon Laboratories Inc
Series
C8051F06xr
Specifications of C8051F061
Core Processor
8051
Core Size
8-Bit
Speed
25MHz
Connectivity
CAN, SMBus (2-Wire/I²C), SPI, UART/USART
Peripherals
Brown-out Detect/Reset, POR, PWM, Temp Sensor, WDT
Number Of I /o
24
Program Memory Size
64KB (64K x 8)
Program Memory Type
FLASH
Ram Size
4.25K x 8
Voltage - Supply (vcc/vdd)
2.7 V ~ 3.6 V
Data Converters
A/D 2x16b, 8x10b; D/A 2x12b
Oscillator Type
Internal
Operating Temperature
-40°C ~ 85°C
Package / Case
64-TQFP, 64-VQFP
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
Eeprom Size
-
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C8051F060/1/2/3/4/5/6/7
13.2.6.3.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 Page Control 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 Port 5 (SFR “P5”, located at address 0xD8 on SFR
Page 0x0F). The device is also using the Programmable Counter Array (PCA) and the 10-bit ADC (ADC2)
window comparator to monitor a voltage. The PCA is timing a critical control function in its interrupt service
routine (ISR), so its interrupt is enabled and is set to high priority. The ADC2 is monitoring a voltage that is
less important, but to minimize the software overhead its window comparator is being used with an associ-
ated ISR that is set to low priority. At this point, the SFR page is set to access the Port 5 SFR (SFRPAGE =
0x0F). See Figure 13.4 below.
Figure 13.4. SFR Page Stack While Using SFR Page 0x0F To Access Port 5
SFR Page
Stack SFR's
0x0F
SFRPAGE
(Port 5)
SFRNEXT
SFRLAST
134
Rev. 1.2
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