C8051F930-TB Silicon Laboratories Inc, C8051F930-TB Datasheet - Page 183
![BOARD TARGET/PROTO W/C8051F930](/photos/9/25/92560/c8051f930-tb_sml.jpg)
C8051F930-TB
Manufacturer Part Number
C8051F930-TB
Description
BOARD TARGET/PROTO W/C8051F930
Manufacturer
Silicon Laboratories Inc
Type
MCUr
Specifications of C8051F930-TB
Contents
Board
Processor To Be Evaluated
C8051F930
Processor Series
C8051F9xx
Data Bus Width
8 bit
Interface Type
I2C, UART, SPI
Maximum Operating Temperature
+ 85 C
Minimum Operating Temperature
- 40 C
Operating Supply Voltage
0.9 V to 3.6 V
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
For Use With/related Products
C8051F930
Lead Free Status / Rohs Status
Lead free / RoHS Compliant
Other names
336-1472
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Important Notes:
•
•
•
SFR Definition 18.1. VDM0CN: VDD/DC+ Supply Monitor Control
SFR Page = 0x0; SFR Address = 0xFF
Reset
Name
Bit
4:2
1:0
Type
7
6
5
Bit
The Power-on Reset (POR) delay is not incurred after a VDD/DC+ supply monitor reset. See Section
“4. Electrical Characteristics” on page 43 for complete electrical characteristics of the VDD/DC+ moni-
tor.
Software should take care not to inadvertently disable the V
to RSTSRC to enable other reset sources or to trigger a software reset. All writes to RSTSRC should
explicitly set PORSF to '1' to keep the V
The VDD/DC+ supply monitor must be enabled before selecting it as a reset source . Selecting the
VDD/DC+ supply monitor as a reset source before it has stabilized may generate a system reset. In
systems where this reset would be undesirable, a delay should be introduced between enabling the
VDD/DC+ supply monitor and selecting it as a reset source. See Section “4. Electrical Characteristics”
on page 43 for minimum VDD/DC+ Supply Monitor turn-on time. No delay should be introduced in
systems where software contains routines that erase or write Flash memory. The procedure for
enabling the VDD/DC+ supply monitor and selecting it as a reset source is shown below:
1. Enable the VDD/DC+ Supply Monitor (VDMEN bit in VDM0CN = 1).
2. Wait for the VDD/DC+ Supply Monitor to stabilize (optional).
3. Select the VDD/DC+ Supply Monitor as a reset source (PORSF bit in RSTSRC = 1).
VDDSTAT
Reserved
VDMEN
VDDOK
Unused
VDMEN
Name
R/W
7
1
VDDSTAT
VDD/DC+ Supply Monitor Enable.
This bit turns the VDD/DC+ supply monitor circuit on/off. The VDD/DC+ Supply
Monitor cannot generate system resets until it is also selected as a reset source in
register RSTSRC (SFR Definition 18.2).
0: VDD/DC+ Supply Monitor Disabled.
1: VDD/DC+ Supply Monitor Enabled.
VDD/DC+ Supply Status.
This bit indicates the current power supply status.
0: VDD/DC+ is at or below the V
1: VDD/DC+ is above the V
VDD/DC+ Supply Status (Early Warning).
This bit indicates the current power supply status.
0: VDD/DC+ is at or below the V
1: VDD/DC+ is above the V
Reserved.
Read = 000b. Must Write 000b.
Unused.
Read = 00b. Write = Don’t Care.
Varies
R
6
VDDOK
Varies
R
5
DD
Reserved
Monitor enabled as a reset source.
R/W
Rev. 1.1
RST
WARN
4
0
threshold.
RST
WARN
monitor threshold.
C8051F93x-C8051F92x
Reserved
Function
threshold.
R/W
threshold.
3
0
DD
Monitor as a reset source when writing
Reserved
R/W
2
0
R/W
1
0
R/W
0
0
183
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