參數(shù)資料
型號(hào): C8051F012
廠商: Silicon Laboratories Inc
文件頁數(shù): 17/171頁
文件大?。?/td> 0K
描述: IC 8051 MCU 32K FLASH 32LQFP
標(biāo)準(zhǔn)包裝: 250
系列: C8051F01x
核心處理器: 8051
芯體尺寸: 8-位
速度: 20MHz
連通性: SMBus(2 線/I²C),SPI,UART/USART
外圍設(shè)備: 欠壓檢測(cè)/復(fù)位,POR,PWM,溫度傳感器,WDT
輸入/輸出數(shù): 8
程序存儲(chǔ)器容量: 32KB(32K x 8)
程序存儲(chǔ)器類型: 閃存
RAM 容量: 256 x 8
電壓 - 電源 (Vcc/Vdd): 2.7 V ~ 3.6 V
數(shù)據(jù)轉(zhuǎn)換器: A/D 4x10b; D/A 2x12b
振蕩器型: 內(nèi)部
工作溫度: -40°C ~ 85°C
封裝/外殼: 32-LQFP
包裝: 托盤
C8051F000/1/2/5/6/7
C8051F010/1/2/5/6/7
16. SMBus / I2C Bus
The SMBus serial I/O interface is compliant with the System Management Bus Specification, version 1.1. It is a
two-wire, bi-directional serial bus, which is also compatible with the I
2C serial bus. Reads and writes to the
interface by the system controller are byte oriented with the SMBus interface autonomously controlling the serial
transfer of the data. Data can be transferred at up to 1/8
th of the system clock if desired (this can be faster than
allowed by the SMBus specification, depending on the system clock used). A method of extending the clock-low
duration is used to accommodate devices with different speed capabilities on the same bus.
Two types of data transfers are possible: data transfers from a master transmitter to an addressed slave receiver, and
data transfers from an addressed slave transmitter to a master receiver. The master device initiates both types of
data transfers and provides the serial clock pulses. The SMBus interface may operate as a master or a slave.
Multiple master devices on the same bus are also supported. If two or more masters attempt to initiate a data
transfer simultaneously, an arbitration scheme is employed with a single master always winning the arbitration.
Figure 16.1. SMBus Block Diagram
SFR Bus
Data Path
Control
SFR Bus
Write to
SMB0DAT
SMBUS CONTROL LOGIC
Read
SMB0DAT
SMB0ADR
S
L
V
6
G
C
S
L
V
5
S
L
V
4
S
L
V
3
S
L
V
2
S
L
V
1
S
L
V
0
C
R
O
S
B
A
R
Clock Divide
Logic
SYSCLK
SMB0CR
C
R
7
C
R
6
C
R
5
C
R
4
C
R
3
C
R
2
C
R
1
C
R
0
SCL
FILTER
N
SDA
Control
0000000b
7 MSBs
8
A
B
A=B
8
0
1
2
3
4
5
6
7
SMB0DAT
8
SMB0CN
S
T
A
S
I
A
F
T
E
T
O
E
N
S
M
B
U
S
Y
S
T
O
SMB0STA
S
T
A
4
S
T
A
3
S
T
A
2
S
T
A
1
S
T
A
0
SCL
Control
Status Generation
Arbitration
SCL Synchronization
SCL Generation (Master Mode)
IRQ Generation
S
T
A
5
S
T
A
6
S
T
A
7
A
B
A=B
SMBUS
IRQ
Interrupt
Request
Port I/O
1
0
SDA
FILTER
N
7
113
Rev. 1.7
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C8051F012-GQR 功能描述:8位微控制器 -MCU 32KB 10ADC 32Pin MCU Tape and Reel RoHS:否 制造商:Silicon Labs 核心:8051 處理器系列:C8051F39x 數(shù)據(jù)總線寬度:8 bit 最大時(shí)鐘頻率:50 MHz 程序存儲(chǔ)器大小:16 KB 數(shù)據(jù) RAM 大小:1 KB 片上 ADC:Yes 工作電源電壓:1.8 V to 3.6 V 工作溫度范圍:- 40 C to + 105 C 封裝 / 箱體:QFN-20 安裝風(fēng)格:SMD/SMT
C8051F012-PX0005GQ 制造商:Silicon Laboratories Inc 功能描述:
C8051F012R 功能描述:8位微控制器 -MCU C 10Bit 32Pin RoHS:否 制造商:Silicon Labs 核心:8051 處理器系列:C8051F39x 數(shù)據(jù)總線寬度:8 bit 最大時(shí)鐘頻率:50 MHz 程序存儲(chǔ)器大小:16 KB 數(shù)據(jù) RAM 大小:1 KB 片上 ADC:Yes 工作電源電壓:1.8 V to 3.6 V 工作溫度范圍:- 40 C to + 105 C 封裝 / 箱體:QFN-20 安裝風(fēng)格:SMD/SMT