C8051T603-GM Silicon Laboratories Inc, C8051T603-GM Datasheet - Page 124
![IC 8051 MCU 4K-EEPROM 11-QFN](/photos/12/25/122557/c8051t603-gm_sml.jpg)
C8051T603-GM
Manufacturer Part Number
C8051T603-GM
Description
IC 8051 MCU 4K-EEPROM 11-QFN
Manufacturer
Silicon Laboratories Inc
Series
C8051T60xr
Datasheet
1.C8051T600EDB.pdf
(188 pages)
Specifications of C8051T603-GM
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
4KB (4K x 8)
Program Memory Type
OTP
Ram Size
256 x 8
Voltage - Supply (vcc/vdd)
1.8 V ~ 3.6 V
Oscillator Type
Internal
Operating Temperature
-40°C ~ 85°C
Package / Case
11-QFN
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
For Use With
336-1404 - KIT DEV FOR C8051T60X MCU'S
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Eeprom Size
-
Data Converters
-
Lead Free Status / Rohs Status
Details
Other names
336-1656-5
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- Download datasheet (898Kb)
C8051T600/1/2/3/4/5/6
The SMBCS1–0 bits select the SMBus clock source, which is used only when operating as a master or
when the Free Timeout detection is enabled. When operating as a master, overflows from the selected
source determine the absolute minimum SCL low and high times as defined in Equation 23.1. Note that the
selected clock source may be shared by other peripherals so long as the timer is left running at all times.
For example, Timer 1 overflows may generate the SMBus and UART baud rates simultaneously. Timer
configuration is covered in Section “25. Timers” on page 145.
The selected clock source should be configured to establish the minimum SCL High and Low times as per
Equation 23.1. When the interface is operating as a master (and SCL is not driven or extended by any
other devices on the bus), the typical SMBus bit rate is approximated by Equation 23.2.
Figure 23.4 shows the typical SCL generation described by Equation 23.2. 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 23.1.
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
124
Timer Source
Overflows
SCL
LOW
Equation 23.1. Minimum SCL High and Low Times
T
Low
. The actual SCL output may vary due to other devices on the bus (SCL may be
Figure 23.4. Typical SMBus SCL Generation
Table 23.1. SMBus Clock Source Selection
SMBCS1
T
Equation 23.2. Typical SMBus Bit Rate
HighMin
0
0
1
1
BitRate
T
SMBCS0
=
High
T
0
1
0
1
LowMin
=
f
--------------------------------------------- -
ClockSourceOverflow
Rev. 1.2
=
Timer 2 High Byte Overflow
Timer 2 Low Byte Overflow
SMBus Clock Source
--------------------------------------------- -
f
ClockSourceOverflow
Timer 0 Overflow
Timer 1 Overflow
3
1
SCL High Timeout
HIGH
is typically
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