C8051F305-GMR Silicon Laboratories Inc, C8051F305-GMR Datasheet - Page 127

• Manufacturer Part Number: C8051F305-GMR
• Description: IC 8051 MCU 2K FLASH 11QFN
• Manufacturer: Silicon Laboratories Inc
• Series: C8051F30xr

Specifications of C8051F305-GMR

• Core Processor: 8051
• Core Size: 8-Bit
• Speed: 25MHz
• Connectivity: SMBus (2-Wire/I²C), UART/USART
• Peripherals: POR, PWM, WDT
• Number Of I /o: 8
• Program Memory Size: 2KB (2K x 8)
• Program Memory Type: FLASH
• Ram Size: 256 x 8
• Voltage - Supply (vcc/vdd): 2.7 V ~ 3.6 V
• Oscillator Type: External
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 11-VQFN
• For Use With: 336-1444 - ADAPTER PROGRAM TOOLSTICK F300
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Data Converters: -

13.6. SMBus Status Decoding
The current SMBus status can be easily decoded using the SMB0CN register. In the table below, STATUS
VECTOR refers to the four upper bits of SMB0CN: MASTER, TXMODE, STA, and STO. Note that the
shown response options are only the typical responses; application-specific procedures are allowed as
long as they conform with the SMBus specification. Highlighted responses are allowed but do not conform
to the SMBus specification.
1110
1100
Values Read
0
0
0
0
0
0
X A master START was generated. Load slave address + R/W
0 A master data or address byte
1 A master data or address byte
was transmitted; NACK received.
was transmitted; ACK received.
Table 13.4. SMBus Status Decoding
Current SMbus State
Rev. 2.9
into SMB0DAT.
Set STA to restart transfer.
Abort transfer.
Load next data byte into
SMB0DAT
End transfer with STOP
End transfer with STOP and
start another transfer.
Send repeated START
Switch to Master Receiver
Mode (clear SI without writ-
ing new data to SMB0DAT).
Typical Response Options
C8051F300/1/2/3/4/5
0
1
0
0
0
1
1
0
Written
Values
0
0
1
0
1
1
0
0
X
X
X
X
X
X
X
X
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