C8051F800DK Silicon Laboratories Inc, C8051F800DK Datasheet - Page 124
![KIT DEV C8051F800](/photos/28/94/289400/mcudevkit_sml.jpg)
C8051F800DK
Manufacturer Part Number
C8051F800DK
Description
KIT DEV C8051F800
Manufacturer
Silicon Laboratories Inc
Type
MCUr
Specifications of C8051F800DK
Contents
Board, Cables, CD, Debugger, Power Supply
Processor To Be Evaluated
C8051F800
Data Bus Width
16 bit
Interface Type
USB
Operating Supply Voltage
7 V to 15 V
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
For Use With/related Products
C8051F8xx
Lead Free Status / Rohs Status
Supplier Unconfirmed
Other names
336-1797
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C8051F80x-83x
21.1. Power-On Reset
During power-up, the device is held in a reset state and the RST pin is driven low until V
V
increases (V
power-on and V
cause the device to be released from reset before V
1 ms, the power-on reset delay (T
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 content of internal data mem-
ory should be assumed to be undefined after a power-on reset. The V
as a reset source following a power-on reset.
124
RST
Logic HIGH
Logic LOW
. A delay occurs before the device is released from reset; the delay decreases as the V
DD
ramp time is defined as how fast V
DD
RST
monitor reset timing. The maximum V
Figure 21.2. Power-On and V
V
RST
Power-On
PORDelay
Reset
T
) is typically less than 10 ms.
PORDelay
Rev. 1.0
DD
DD
DD
reaches the V
ramps from 0 V to V
DD
Monitor Reset Timing
ramp time is 1 ms; slower ramp times may
Monitor
Reset
RST
VDD
DD
monitor is enabled and selected
level. For ramp times less than
RST
). Figure 21.2. plots the
DD
V
settles above
DD
DD
ramp time
t
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