C8051F336-GMR Silicon Laboratories Inc, C8051F336-GMR Datasheet - Page 143

Microcontrollers (MCU) 16KB 10ADC 10DAC 768Ram MCU Lead Free

C8051F336-GMR

Manufacturer Part Number
C8051F336-GMR
Description
Microcontrollers (MCU) 16KB 10ADC 10DAC 768Ram MCU Lead Free
Manufacturer
Silicon Laboratories Inc
Datasheet

Specifications of C8051F336-GMR

Processor Series
C8051F3x
Core
8051
Data Bus Width
8 bit
Program Memory Type
Flash
Program Memory Size
16 KB
Data Ram Size
768 B
Interface Type
I2C, SPI, UART
Maximum Clock Frequency
25 MHz
Number Of Programmable I/os
17
Number Of Timers
4
Operating Supply Voltage
2.7 V to 3.6 V
Maximum Operating Temperature
+ 85 C
Mounting Style
SMD/SMT
Package / Case
QFN-20
3rd Party Development Tools
KSK-SL-TOOLSTICK, PK51, CA51, A51, ULINK2
Development Tools By Supplier
C8051F336DK
Minimum Operating Temperature
- 40 C
On-chip Adc
10 bit
On-chip Dac
10 bit
Package
20QFN
Device Core
8051
Family Name
C8051F336
Maximum Speed
25 MHz
Ram Size
768 Byte
Operating Temperature
-40 to 85 °C
Lead Free Status / Rohs Status
 Details

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0
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 21.2 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 “21.3.4. SCL Low Timeout” on page 140). 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 21.4).
Note: Setup Time for ACK bit transmissions and the MSB of all data transfers. When using
EXTHOLD
software acknowledgement, the s/w 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
Table 21.2. Minimum SDA Setup and Hold Times
Minimum SDA Setup Time
1 system clock + s/w delay
T
low
11 system clocks
– 4 system clocks
or
Rev.1.0
*
Minimum SDA Hold Time
12 system clocks
3 system clocks
C8051F336/7/8/9
143

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