C8051F960-A-GQ Silicon Labs, C8051F960-A-GQ Datasheet - Page 279
![no-image](/images/no-image-200.jpg)
C8051F960-A-GQ
Manufacturer Part Number
C8051F960-A-GQ
Description
8-bit Microcontrollers - MCU 128KB DC-DC LCD AES
Manufacturer
Silicon Labs
Datasheet
1.C8051F960-A-GQ.pdf
(492 pages)
Specifications of C8051F960-A-GQ
Rohs
yes
Core
8051
Processor Series
C8051
Data Bus Width
8 bit
Maximum Clock Frequency
24.5 MHz
Program Memory Size
128 KB
Data Ram Size
8 KB
On-chip Adc
Yes
Operating Supply Voltage
1.8 V to 3.8 V
Operating Temperature Range
- 40 C to + 85 C
Package / Case
QFP-80
Mounting Style
SMD/SMT
Available stocks
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Company:
Part Number:
C8051F960-A-GQ
Manufacturer:
Silicon Laboratories Inc
Quantity:
10 000
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Part Number:
C8051F960-A-GQR
Manufacturer:
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22.1. Power-On Reset
During power-up, the device is held in a reset state and the RST pin voltage tracks the supply voltage
(through a weak pull-up) until the device is released from reset. After the supply settles above VPOR, a
delay occurs before the device is released from reset; the delay decreases as the supply ramp time
increases (ramp time is defined as how fast the supply ramps from 0 V to V
power-on and supply monitor reset timing. For valid ramp times (less than 3 ms), the power-on reset delay
(T
Note: The maximum supply ramp time is 3 ms; slower ramp times may cause the device to be released from reset
On exit from a power-on reset, the PORSF flag (RSTSRC.1) is set by hardware to logic 1. When PORSF is
set, all of the other reset flags in the RSTSRC Register are indeterminate (PORSF is cleared by all other
resets). Since all resets cause program execution to begin at the same location (0x0000), software can
read the PORSF flag to determine if a power-up was the cause of reset. The contents of internal data
memory should be assumed to be undefined after a power-on reset.
The POR supply monitor will continue to monitor the VBAT supply, even in Sleep Mode, to reset the sys-
tem if the supply voltage drops below VPOR. It can be disabled to save power by writing 1 to the MONDIS
(PMU0MD.5) bit. When the POR supply monitor is disabled, all reset sources will trigger a full POR and will
re-enable the POR supply monitor.
PORDelay
before the supply reaches the V
See specification
table for min/max
voltages.
) is typically 7 ms (V
Logic HIGH
Logic LOW
V
POR
Figure 22.2. Power-On Reset Timing Diagram
DD
RST
= 1.8 V) or 15 ms (V
POR
level.
Power-On
Reset
Rev. 0.5
T
PORDelay
DD
= 3.6 V).
Power-On
Reset
POR
Supply voltage
T
C8051F96x
PORDelay
). Figure 22.2 plots the
t
279
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