C8051T602-GS Silicon Laboratories Inc, C8051T602-GS Datasheet - Page 122
![IC 8051 MCU 4K-EEPROM 14-SOIC](/photos/12/25/122560/c8051t602-gs_sml.jpg)
C8051T602-GS
Manufacturer Part Number
C8051T602-GS
Description
IC 8051 MCU 4K-EEPROM 14-SOIC
Manufacturer
Silicon Laboratories Inc
Series
C8051T60xr
Datasheet
1.C8051T600EDB.pdf
(188 pages)
Specifications of C8051T602-GS
Program Memory Type
OTP
Program Memory Size
4KB (4K x 8)
Package / Case
14-SOIC (3.9mm Width), 14-SOL
Core Processor
8051
Core Size
8-Bit
Speed
25MHz
Connectivity
SMBus (2-Wire/I²C), UART/USART
Peripherals
POR, PWM, Temp Sensor, WDT
Number Of I /o
8
Ram Size
256 x 8
Voltage - Supply (vcc/vdd)
1.8 V ~ 3.6 V
Data Converters
A/D 8x10b
Oscillator Type
Internal
Operating Temperature
-40°C ~ 85°C
Processor Series
C8051T6x
Core
8051
Data Bus Width
8 bit
Data Ram Size
256 B
Interface Type
I2C/SMBus/UART
Maximum Clock Frequency
25 MHz
Number Of Programmable I/os
8
Number Of Timers
3
Maximum Operating Temperature
+ 85 C
Mounting Style
SMD/SMT
3rd Party Development Tools
PK51, CA51, A51, ULINK2
Development Tools By Supplier
C8051T600DK
Minimum Operating Temperature
- 40 C
On-chip Adc
8-ch x 10-bit
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
For Use With
336-1404 - KIT DEV FOR C8051T60X MCU'S
Eeprom Size
-
Lead Free Status / Rohs Status
Lead free / RoHS Compliant
Other names
336-1655-5
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
C8051T602-GS
Manufacturer:
Silicon Labs
Quantity:
135
C8051T600/1/2/3/4/5/6
All transactions are initiated by a master, with one or more addressed slave devices as the target. The
master generates the START condition and then transmits the slave address and direction bit. If the trans-
action is a WRITE operation from the master to the slave, the master transmits the data a byte at a time
and waits for an ACK from the slave at the end of each byte. For READ operations, the slave transmits the
data and waits for an ACK from the master at the end of each byte. At the end of the data transfer, the
master generates a STOP condition to terminate the transaction and free the bus. Figure 23.3 illustrates a
typical SMBus transaction.
SCL
SDA
SLA6
SLA5-0
R/W
D7
D6-0
START
Slave Address + R/W
ACK
Data Byte
NACK
STOP
Figure 23.3. SMBus Transaction
23.3.1. Transmitter Vs. Receiver
On the SMBus communications interface, a device is the “transmitter” when it is sending an address or
data byte to another device on the bus. A device is a “receiver” when an address or data byte is being sent
to it from another device on the bus. The transmitter controls the SDA line during the address or data byte.
After each byte of address or data information is sent by the transmitter, the receiver sends an ACK or
NACK bit during the ACK phase of the transfer, during which time the receiver controls the SDA line.
23.3.2. Arbitration
A master may start a transfer only if the bus is free. The bus is free after a STOP condition or after the SCL
and SDA lines remain high for a specified time (see Section “23.3.5. SCL High (SMBus Free) Timeout” on
page 123). In the event that two or more devices attempt to begin a transfer at the same time, an arbitra-
tion scheme is employed to force one master to give up the bus. The master devices continue transmitting
until one attempts a HIGH while the other transmits a LOW. Since the bus is open-drain, the bus will be
pulled LOW. The master attempting the HIGH will detect a LOW SDA and lose the arbitration. The winning
master continues its transmission without interruption; the losing master becomes a slave and receives the
rest of the transfer if addressed. This arbitration scheme is non-destructive: one device always wins, and
no data is lost.
23.3.3. Clock Low Extension
2
SMBus provides a clock synchronization mechanism, similar to I
C, which allows devices with different
speed capabilities to coexist on the bus. A clock-low extension is used during a transfer in order to allow
slower slave devices to communicate with faster masters. The slave may temporarily hold the SCL line
LOW to extend the clock low period, effectively decreasing the serial clock frequency.
23.3.4. SCL Low Timeout
If the SCL line is held low by a slave device on the bus, no further communication is possible. Furthermore,
the master cannot force the SCL line high to correct the error condition. To solve this problem, the SMBus
protocol specifies that devices participating in a transfer must detect any clock cycle held low longer than
25 ms as a “timeout” condition. Devices that have detected the timeout condition must reset the communi-
cation no later than 10 ms after detecting the timeout condition.
122
Rev. 1.2