C8051F313-GM Silicon Laboratories Inc, C8051F313-GM Datasheet - Page 164
C8051F313-GM
Manufacturer Part Number
C8051F313-GM
Description
IC 8051 MCU 8K FLASH 28MLP
Manufacturer
Silicon Laboratories Inc
Series
C8051F31xr
Specifications of C8051F313-GM
Core Size
8-Bit
Program Memory Size
8KB (8K x 8)
Oscillator Type
Internal
Core Processor
8051
Speed
25MHz
Connectivity
SMBus (2-Wire/I²C), SPI, UART/USART
Peripherals
POR, PWM, Temp Sensor, WDT
Number Of I /o
25
Program Memory Type
FLASH
Ram Size
1.25K x 8
Voltage - Supply (vcc/vdd)
2.7 V ~ 3.6 V
Data Converters
A/D 17x10b
Operating Temperature
-40°C ~ 85°C
Package / Case
28-VQFN Exposed Pad, 28-HVQFN, 28-SQFN, 28-DHVQFN
No. Of I/o's
25
Ram Memory Size
1280Byte
Cpu Speed
25MHz
No. Of Timers
4
No. Of Pwm Channels
5
Digital Ic Case
RoHS Compliant
Rohs Compliant
Yes
Processor Series
C8051F3x
Core
8051
Data Bus Width
8 bit
Data Ram Size
1.25 KB
Interface Type
I2C, SMBus, SPI, UART
Maximum Clock Frequency
25 MHz
Number Of Programmable I/os
25
Number Of Timers
5
Operating Supply Voltage
2.7 V to 3.6 V
Maximum Operating Temperature
+ 85 C
Mounting Style
SMD/SMT
3rd Party Development Tools
PK51, CA51, A51, ULINK2
Development Tools By Supplier
C8051F310DK
Minimum Operating Temperature
- 40 C
On-chip Adc
10 bit
Data Rom Size
128 B
Height
0.88 mm
Length
5 mm
Supply Voltage (max)
3.6 V
Supply Voltage (min)
2.7 V
Width
5 mm
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
For Use With
770-1006 - ISP 4PORT FOR SILABS C8051F MCU
Eeprom Size
-
Lead Free Status / Rohs Status
Details
Other names
336-1256
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C8051F310/1/2/3/4/5/6/7
15.1. Enhanced Baud Rate Generation
The UART0 baud rate is generated by Timer 1 in 8-bit auto-reload mode. The TX clock is generated by
TL1; the RX clock is generated by a copy of TL1 (shown as RX Timer in Figure 15.2), which is not user-
accessible. Both TX and RX Timer overflows are divided by two to generate the TX and RX baud rates.
The RX Timer runs when Timer 1 is enabled, and uses the same reload value (TH1). However, an
RX Timer reload is forced when a START condition is detected on the RX pin. This allows a receive to
begin any time a START is detected, independent of the TX Timer state.
Timer 1 should be configured for Mode 2, 8-bit auto-reload (see
ter/Timer with Auto-Reload” on page
occur at two times the desired UART baud rate frequency. Note that Timer 1 may be clocked by one of six
sources: SYSCLK, SYSCLK / 4, SYSCLK / 12, SYSCLK / 48, the external oscillator clock / 8, or an exter-
nal input T1. For any given Timer 1 clock source, the UART0 baud rate is determined by Equation 15.1.
Where T1
value). Timer 1 clock frequency is selected as described in
reference for typical baud rates and system clock frequencies is given in Table 15.1 through Table 15.6.
Note that the internal oscillator may still generate the system clock when the external oscillator is driving
Timer 1.
164
CLK
is the frequency of the clock supplied to Timer 1, and T1H is the high byte of Timer 1 (reload
Detected
Start
Figure 15.2. UART0 Baud Rate Logic
RX Timer
Equation 15.1. UART0 Baud Rate
UartBaudRate
Timer 1
TH1
TL1
189). The Timer 1 reload value should be set so that overflows will
Overflow
Overflow
Rev. 1.7
=
------------------------------ -
256 T1H
T1
–
Section “17. Timers” on page
CLK
2
2
Section “17.1.3. Mode 2: 8-bit Coun-
UART
1
-- -
2
RX Clock
TX Clock
187. A quick
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