C8051F006-GQR Silicon Laboratories Inc, C8051F006-GQR Datasheet - Page 119
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C8051F006-GQR
Manufacturer Part Number
C8051F006-GQR
Description
IC 8051 MCU 32K FLASH 48TQFP
Manufacturer
Silicon Laboratories Inc
Series
C8051F00xr
Specifications of C8051F006-GQR
Core Processor
8051
Core Size
8-Bit
Speed
25MHz
Connectivity
SMBus (2-Wire/I²C), SPI, UART/USART
Peripherals
Brown-out Detect/Reset, POR, PWM, Temp Sensor, WDT
Number Of I /o
16
Program Memory Size
32KB (32K x 8)
Program Memory Type
FLASH
Ram Size
2.25K x 8
Voltage - Supply (vcc/vdd)
2.7 V ~ 3.6 V
Data Converters
A/D 8x12b, D/A 2x12b
Oscillator Type
Internal
Operating Temperature
-40°C ~ 85°C
Package / Case
48-TQFP, 48-VQFP
For Use With
336-1188 - DEV KIT FOR F005/006/007
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Eeprom Size
-
Available stocks
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Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
C8051F006-GQR
Manufacturer:
SILICON
Quantity:
1 200
Company:
Part Number:
C8051F006-GQR
Manufacturer:
Silicon Laboratories Inc
Quantity:
10 000
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16.6.2. Clock Rate Register
119
C8051F000/1/2/5/6/7
C8051F010/1/2/5/6/7
Bits7-0: SMB0CR.[7:0]: SMBus Clock Rate Preset
R/W
Bit7
The SMB0CR Clock Rate register controls the frequency of the serial clock SCL in master
mode. The 8-bit word stored in the SMB0CR Register preloads a dedicated 8-bit timer.
The timer counts up, and when it rolls over to 0x00, the SCL logic state toggles.
The SMB0CR setting should be bounded by the following equation, where SMB0CR is the
unsigned 8-bit value in register SMB0CR, and SYSCLK is the system clock frequency in
Hz:
The resulting SCL signal high and low times are given by the following equations:
Using the same value of SMB0CR from above, the Bus Free Timeout period is given in the
following equation:
R/W
Bit6
Figure 16.5. SMB0CR: SMBus Clock Rate Register
SMB0CR < ((288 - 0.85 * SYSCLK) / 1.125
T
T
R/W
Bit5
HIGH
BFT
T
LOW
10 * [(256 – SMB0CR) + 1] / SYSCLK
(258 – SMB0CR) / SYSCLK + 625 ns
= (256 – SMB0CR) / SYSCLK
R/W
Bit4
Rev. 1.7
R/W
Bit3
R/W
Bit2
E
6)
R/W
Bit1
R/W
Bit0
SFR Address:
Reset Value
00000000
0xCF
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