C8051F713-GM Silicon Laboratories Inc, C8051F713-GM Datasheet - Page 235
![IC 8051 MCU 8K FLASH 48-QFN](/photos/12/26/122691/c8051f713-gm_sml.jpg)
C8051F713-GM
Manufacturer Part Number
C8051F713-GM
Description
IC 8051 MCU 8K FLASH 48-QFN
Manufacturer
Silicon Laboratories Inc
Series
C8051F71xr
Specifications of C8051F713-GM
Core Processor
8051
Core Size
8-Bit
Speed
25MHz
Connectivity
SMBus (2-Wire/I²C), SPI, UART/USART
Peripherals
Cap Sense, POR, PWM, WDT
Number Of I /o
39
Program Memory Size
8KB (8K x 8)
Program Memory Type
FLASH
Eeprom Size
32 x 8
Ram Size
512 x 8
Voltage - Supply (vcc/vdd)
1.8 V ~ 3.6 V
Oscillator Type
Internal
Operating Temperature
-40°C ~ 85°C
Package / Case
48-QFN
Processor Series
C8051F7x
Core
8051
Data Bus Width
8 bit
Data Ram Size
512 B
Interface Type
I2C, SMBus, SPI, UART
Maximum Clock Frequency
25 MHz
Number Of Programmable I/os
39
Number Of Timers
4
Operating Supply Voltage
1.8 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
C8051F700DK
Minimum Operating Temperature
- 40 C
For Use With
336-1635 - DEV KIT FOR C8051F700
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Data Converters
-
Lead Free Status / Rohs Status
Details
Other names
336-1614-5
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
C8051F713-GM
Manufacturer:
Silicon Laboratories Inc
Quantity:
135
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30.5.4. Read Sequence (Slave)
During a read sequence, an SMBus master reads data from a slave device. The slave in this transfer will
be a receiver during the address byte, and a transmitter during all data bytes. When slave events are
enabled (INH = 0), the interface enters Slave Receiver Mode (to receive the slave address) when a START
followed by a slave address and direction bit (READ in this case) is received. If hardware ACK generation
is disabled, upon entering Slave Receiver Mode, an interrupt is generated and the ACKRQ bit is set. The
software must respond to the received slave address with an ACK, or ignore the received slave address
with a NACK. If hardware ACK generation is enabled, the hardware will apply the ACK for a slave address
which matches the criteria set up by SMB0ADR and SMB0ADM. The interrupt will occur after the ACK
cycle.
If the received slave address is ignored (by software or hardware), slave interrupts will be inhibited until the
next START is detected. If the received slave address is acknowledged, zero or more data bytes are trans-
mitted. If the received slave address is acknowledged, data should be written to SMB0DAT to be transmit-
ted. The interface enters slave transmitter mode, and transmits one or more bytes of data. After each byte
is transmitted, the master sends an acknowledge bit; if the acknowledge bit is an ACK, SMB0DAT should
be written with the next data byte. If the acknowledge bit is a NACK, SMB0DAT should not be written to
before SI is cleared (an error condition may be generated if SMB0DAT is written following a received
NACK while in slave transmitter mode). The interface exits slave transmitter mode after receiving a STOP.
The interface will switch to slave receiver mode if SMB0DAT is not written following a Slave Transmitter
interrupt. Figure 30.8 shows a typical slave read sequence. Two transmitted data bytes are shown, though
any number of bytes may be transmitted. Notice that all of the “data byte transferred” interrupts occur after
the ACK cycle in this mode, regardless of whether hardware ACK generation is enabled.
30.6. SMBus Status Decoding
The current SMBus status can be easily decoded using the SMB0CN register. The appropriate actions to
take in response to an SMBus event depend on whether hardware slave address recognition and ACK
generation is enabled or disabled. Table 30.5 describes the typical actions when hardware slave address
recognition and ACK generation is disabled. Table 30.6 describes the typical actions when hardware slave
address recognition and ACK generation is enabled. In the tables, STATUS VECTOR refers to the four
upper bits of SMB0CN: MASTER, TXMODE, STA, and STO. The shown response options are only the typ-
ical responses; application-specific procedures are allowed as long as they conform to the SMBus specifi-
cation. Highlighted responses are allowed by hardware but do not conform to the SMBus specification.
S
Received by SMBus
Interface
Transmitted by
SMBus Interface
SLA
Figure 30.8. Typical Slave Read Sequence
R
A
Interrupts with Hardware ACK Disabled (EHACK = 0)
Interrupts with Hardware ACK Enabled (EHACK = 1)
Data Byte
Rev. 1.0
A
S = START
P = STOP
N = NACK
R = READ
SLA = Slave Address
Data Byte
C8051F70x/71x
N
P
235
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