C8051F365-GM Silicon Laboratories Inc, C8051F365-GM Datasheet - Page 207
![IC 8051 MCU 32K FLASH 28-QFN](/photos/12/27/122713/c8051f365-gm_sml.jpg)
C8051F365-GM
Manufacturer Part Number
C8051F365-GM
Description
IC 8051 MCU 32K FLASH 28-QFN
Manufacturer
Silicon Laboratories Inc
Series
C8051F36xr
Specifications of C8051F365-GM
Program Memory Type
FLASH
Program Memory Size
32KB (32K x 8)
Package / Case
28-QFN
Core Processor
8051
Core Size
8-Bit
Speed
100MHz
Connectivity
SMBus (2-Wire/I²C), SPI, UART/USART
Peripherals
POR, PWM, Temp Sensor, WDT
Number Of I /o
25
Ram Size
1K x 8
Voltage - Supply (vcc/vdd)
3 V ~ 3.6 V
Oscillator Type
Internal
Operating Temperature
-40°C ~ 85°C
Processor Series
C8051F3x
Core
8051
Data Bus Width
8 bit
Data Ram Size
1 KB
Interface Type
I2C/SMBus/SPI/UART
Maximum Clock Frequency
100 MHz
Number Of Programmable I/os
25
Number Of Timers
4
Maximum Operating Temperature
+ 85 C
Mounting Style
SMD/SMT
3rd Party Development Tools
KSK-SL-TOOLSTICK, PK51, CA51, A51, ULINK2
Development Tools By Supplier
C8051F360DK
Minimum Operating Temperature
- 40 C
Package
28QFN
Device Core
8051
Family Name
C8051F36x
Maximum Speed
100 MHz
Operating Supply Voltage
3.3 V
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
For Use With
770-1006 - ISP 4PORT FOR SILABS C8051F MCU336-1410 - KIT DEV FOR C8051F360 FAMILY
Eeprom Size
-
Data Converters
-
Lead Free Status / Rohs Status
Lead free / RoHS Compliant
Other names
336-1647
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Part Number:
C8051F365-GM
Manufacturer:
SILICON LABS/芯科
Quantity:
20 000
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Figure 18.4 shows the typical SCL generation described by Equation 18.2. Notice that T
twice as large as T
extended low by slower slave devices, or driven low by contending master devices). The bit rate when
operating as a master will never exceed the limits defined by equation Equation 18.1.
Setting the EXTHOLD bit extends the minimum setup and hold times for the SDA line. The minimum SDA
setup time defines the absolute minimum time that SDA is stable before SCL transitions from low-to-high.
The minimum SDA hold time defines the absolute minimum time that the current SDA value remains stable
after SCL transitions from high-to-low. EXTHOLD should be set so that the minimum setup and hold times
meet the SMBus Specification requirements of 250 ns and 300 ns, respectively. Table 18.2 shows the min-
imum setup and hold times for the two EXTHOLD settings. Setup and hold time extensions are typically
necessary when SYSCLK is above 10 MHz.
With the SMBTOE bit set, Timer 3 should be configured to overflow after 25 ms in order to detect SCL low
timeouts (see Section “18.3.3. SCL Low Timeout” on page 204). The SMBus interface will force Timer 3 to
reload while SCL is high, and allow Timer 3 to count when SCL is low. The Timer 3 interrupt service routine
should be used to reset SMBus communication by disabling and re-enabling the SMBus.
SMBus Free Timeout detection can be enabled by setting the SMBFTE bit. When this bit is set, the bus will
be considered free if SDA and SCL remain high for more than 10 SMBus clock source periods (see
Figure 18.4). When a Free Timeout is detected, the interface will respond as if a STOP was detected (an
interrupt will be generated, and STO will be set).
Timer Source
Overflows
SCL
*Note: Setup Time for ACK bit transmissions and the MSB of all data transfers. The s/w
EXTHOLD
delay occurs between the time SMB0DAT or ACK is written and when SI is cleared.
Note that if SI is cleared in the same write that defines the outgoing ACK value, s/w
delay is zero.
0
1
LOW
Table 18.2. Minimum SDA Setup and Hold Times
T
. The actual SCL output may vary due to other devices on the bus (SCL may be
Low
Figure 18.4. Typical SMBus SCL Generation
Minimum SDA Setup Time
1 system clock + s/w delay*
T
low
11 system clocks
– 4 system clocks
T
High
or
C8051F360/1/2/3/4/5/6/7/8/9
Rev. 1.0
Minimum SDA Hold Time
12 system clocks
3 system clocks
SCL High Timeout
HIGH
is typically
207
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