C8051F315R Silicon Labs, C8051F315R Datasheet - Page 107
![no-image](/images/no-image-200.jpg)
C8051F315R
Manufacturer Part Number
C8051F315R
Description
8-bit Microcontrollers - MCU 8KB 10ADC
Manufacturer
Silicon Labs
Datasheet
1.C8051F313R.pdf
(228 pages)
Specifications of C8051F315R
Product Category
8-bit Microcontrollers - MCU
Core
8051
Data Bus Width
8 bit
Maximum Clock Frequency
25 MHz
Program Memory Size
8 KB
Data Ram Size
1.25 KB
On-chip Adc
No
Operating Supply Voltage
2.7 V to 3.6 V
Package / Case
QFN-28
Mounting Style
SMD/SMT
Data Rom Size
128 B
Interface Type
I2C, SMBus, SPI, UART
Maximum Operating Temperature
+ 85 C
Minimum Operating Temperature
- 40 C
Number Of Programmable I/os
25
Number Of Timers
5
On-chip Dac
No
Processor Series
C8051
Program Memory Type
Flash
Factory Pack Quantity
1500
Supply Voltage - Max
3.6 V
Supply Voltage - Min
2.7 V
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any other reset source. For example, if the V
V
Important Note: The V
V
dure for configuring the V
See Figure 9.2 for V
See Table 9.1 for complete electrical characteristics of the V
9.3.
The external RST pin provides a means for external circuitry to force the device into a reset state. Assert-
ing an active-low signal on the RST pin generates a reset; an external pullup and/or decoupling of the RST
pin may be necessary to avoid erroneous noise-induced resets. See Table 9.1 for complete RST pin spec-
ifications. The PINRSF flag (RSTSRC.0) is set on exit from an external reset.
DD
DD
Bit7:
Bit6:
Bits5–0: Reserved. Read = Variable. Write = don’t care.
VDMEN VDDSTAT Reserved Reserved Reserved Reserved Reserved Reserved
monitor will still be enabled after the reset.
monitor as a reset source before it is enabled and stabilized may cause a system reset. The proce-
R/W
Bit7
Step 1. Enable the V
Step 2. Wait for the V
Step 3. Select the V
External Reset
VDMEN: V
This bit is turns the V
resets until it is also selected as a reset source in register RSTSRC (Figure 9.2). The V
Monitor must be allowed to stabilize before it is selected as a reset source. Selecting the
V
See Table 9.1 for the minimum V
0: V
1: V
V
This bit indicates the current power supply status (V
0: V
1: V
DD
DD
DD
DD
DD
DD
Note: This delay should be omitted if software contains routines that erase or write Flash
memory.
monitor as a reset source before it has stabilized may generate a system reset.
STAT: V
Bit6
R
Monitor Disabled.
Monitor Enabled.
is at or below the V
is above the V
DD
SFR Definition 9.1. VDM0CN: V
DD
DD
monitor timing; note that the reset delay is not incurred after a V
DD
DD
Monitor Enable.
monitor must be enabled before it is selected as a reset source. Selecting the
Status.
monitor as a reset source is shown below:
DD
Bit5
DD
R
DD
monitor as a reset source (PORSF bit in RSTSRC = ‘1’).
monitor (VDMEN bit in VDM0CN = ‘1’).
monitor to stabilize (see Table 9.1 for the V
DD
DD
monitor circuit on/off. The V
monitor threshold.
DD
Bit4
R
monitor threshold.
DD
DD
monitor is enabled and a software reset is performed, the
Monitor turn-on time.
Rev. 1.7
Bit3
R
C8051F310/1/2/3/4/5/6/7
DD
DD
Bit2
monitor.
R
DD
DD
Monitor Control
Monitor output).
Monitor cannot generate system
Bit1
R
DD
Monitor turn-on time).
SFR Address:
Bit0
R
DD
monitor reset.
0xFF
Reset Value
Variable
DD
107
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