C8051F700-GQR Silicon Laboratories Inc, C8051F700-GQR Datasheet - Page 167
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C8051F700-GQR
Manufacturer Part Number
C8051F700-GQR
Description
MCU 8-Bit C8051F70x 8051 CISC 15KB Flash 1.8V/3V 64-Pin TQFP T/R
Manufacturer
Silicon Laboratories Inc
Datasheet
1.C8051F700DK.pdf
(306 pages)
Specifications of C8051F700-GQR
Package
64TQFP
Device Core
8051
Family Name
C8051F70x
Maximum Speed
25 MHz
Ram Size
512 Byte
Program Memory Size
15 KB
Operating Supply Voltage
1.8|3 V
Data Bus Width
8 Bit
Program Memory Type
Flash
Number Of Programmable I/os
54
Interface Type
I2C/SMBus/SPI/UART
On-chip Adc
16-chx10-bit
Operating Temperature
-40 to 85 °C
Number Of Timers
4
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25.5. Comparator0 Reset
Comparator0 can be configured as a reset source by writing a 1 to the C0RSEF flag (RSTSRC.5).
Comparator0 should be enabled and allowed to settle prior to writing to C0RSEF to prevent any turn-on
chatter on the output from generating an unwanted reset. The Comparator0 reset is active-low: if the non-
inverting input voltage (on CP0+) is less than the inverting input voltage (on CP0-), the device is put into
the reset state. After a Comparator0 reset, the C0RSEF flag (RSTSRC.5) will read 1 signifying
Comparator0 as the reset source; otherwise, this bit reads 0. The state of the RST pin is unaffected by this
reset.
25.6. Watchdog Timer Reset
The programmable Watchdog Timer (WDT) can be used to prevent software from running out of control
during a system malfunction. The WDT function can be enabled or disabled by software as described in
Section “26. Watchdog Timer” on page 169. If a system malfunction prevents user software from updating
the WDT, a reset is generated and the WDTRSF bit (RSTSRC.3) is set to 1. The state of the RST pin is
unaffected by this reset.
25.7. Flash Error Reset
If a Flash read/write/erase or program read targets an illegal address, a system reset is generated. This
may occur due to any of the following:
The FERROR bit (RSTSRC.6) is set following a Flash error reset. The state of the RST pin is unaffected by
this reset.
25.8. Software Reset
Software may force a reset by writing a 1 to the SWRSF bit (RSTSRC.4). The SWRSF bit will read 1 fol-
lowing a software forced reset. The state of the RST pin is unaffected by this reset.
write operation targets an address above address 0x3DFF.
above address 0x3DFF.
address above 0x3DFF.
Options” on page 149
A Flash write or erase is attempted above user code space. This occurs when PSWE is set to 1 and a MOVX
A Flash read is attempted above user code space. This occurs when a MOVC operation targets an address
A Program read is attempted above user code space. This occurs when user code attempts to branch to an
A Flash read, write or erase attempt is restricted due to a Flash security setting (see
).
Rev. 1.0
C8051F70x/71x
Section “22.3. Security
167
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