- 鎮ㄧ従(xi脿n)鍦ㄧ殑浣嶇疆锛�璨�(m菐i)璩�(m脿i)IC缍�(w菐ng) > PDF鐩寗3816 > PIC16C77-04/L (Microchip Technology)IC MCU OTP 8KX14 A/D PWM 44PLCC PDF璩囨枡涓嬭級
鍙冩暩(sh霉)璩囨枡
| 鍨嬭櫉(h脿o)锛� | PIC16C77-04/L |
| 寤犲晢锛� | Microchip Technology |
| 鏂囦欢闋�(y猫)鏁�(sh霉)锛� | 107/114闋�(y猫) |
| 鏂囦欢澶�?銆�?/td> | 0K |
| 鎻忚堪锛� | IC MCU OTP 8KX14 A/D PWM 44PLCC |
| 鐢�(ch菐n)鍝佸煿瑷�(x霉n)妯″锛� | Asynchronous Stimulus 8-bit PIC® Microcontroller Portfolio |
| 妯�(bi膩o)婧�(zh菙n)鍖呰锛� | 27 |
| 绯诲垪锛� | PIC® 16C |
| 鏍稿績铏曠悊鍣細 | PIC |
| 鑺珨灏哄锛� | 8-浣� |
| 閫熷害锛� | 4MHz |
| 閫ｉ€氭€э細 | I²C锛孲PI锛孶ART/USART |
| 澶栧湇瑷�(sh猫)鍌欙細 | 娆犲妾㈡脯(c猫)/寰�(f霉)浣�锛孭OR锛孭WM锛學DT |
| 杓稿叆/杓稿嚭鏁�(sh霉)锛� | 33 |
| 绋嬪簭瀛樺劜(ch菙)鍣ㄥ閲忥細 | 14KB锛�8K x 14锛� |
| 绋嬪簭瀛樺劜(ch菙)鍣ㄩ(l猫i)鍨嬶細 | OTP |
| RAM 瀹归噺锛� | 368 x 8 |
| 闆诲 - 闆绘簮 (Vcc/Vdd)锛� | 4 V ~ 6 V |
| 鏁�(sh霉)鎿�(j霉)杞�(zhu菐n)鎻涘櫒锛� | A/D 8x8b |
| 鎸暕鍣ㄥ瀷锛� | 澶栭儴 |
| 宸ヤ綔婧害锛� | 0°C ~ 70°C |
| 灏佽/澶栨锛� | 44-LCC锛圝 褰㈠紩绶氾級 |
| 鍖呰锛� | 绠′欢 |
| 閰嶇敤锛� | AC164309-ND - MODULE SKT FOR PM3 44PLCC 444-1001-ND - DEMO BOARD FOR PICMICRO MCU 309-1040-ND - ADAPTER 44-PLCC ZIF TO 40-DIP 309-1039-ND - ADAPTER 44-PLCC TO 40-DIP |
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PIC16C7X
DS30390E-page 92
1997 Microchip Technology Inc.
11.4.4
MULTI-MASTER
The I2C protocol allows a system to have more than
one master. This is called multi-master. When two or
more masters try to transfer data at the same time, arbi-
tration and synchronization occur.
11.4.4.1
ARBITRATION
Arbitration takes place on the SDA line, while the SCL
line is high. The master which transmits a high when
the other master transmits a low loses arbitration
(Figure 11-22), and turns off its data output stage. A
master which lost arbitration can generate clock pulses
until the end of the data byte where it lost arbitration.
When the master devices are addressing the same
device, arbitration continues into the data.
FIGURE 11-22: MULTI-MASTER
ARBITRATION
(TWO MASTERS)
Masters that also incorporate the slave function, and
have lost arbitration must immediately switch over to
slave-receiver mode. This is because the winning mas-
ter-transmitter may be addressing it.
Arbitration is not allowed between:
A repeated START condition
A STOP condition and a data bit
A repeated START condition and a STOP condi-
tion
Care needs to be taken to ensure that these conditions
do not occur.
transmitter 1 loses arbitration
DATA 1 SDA
DATA 1
DATA 2
SDA
SCL
11.2.4.2 Clock Synchronization
Clock synchronization occurs after the devices have
started
arbitration.
This
is
performed
using
a
wired-AND connection to the SCL line. A high to low
transition on the SCL line causes the concerned
devices to start counting off their low period. Once a
device clock has gone low, it will hold the SCL line low
until its SCL high state is reached. The low to high tran-
sition of this clock may not change the state of the SCL
line, if another device clock is still within its low period.
The SCL line is held low by the device with the longest
low period. Devices with shorter low periods enter a
high wait-state, until the SCL line comes high. When
the SCL line comes high, all devices start counting off
their high periods. The rst device to complete its high
period will pull the SCL line low. The SCL line high time
is determined by the device with the shortest high
period, Figure 11-23.
FIGURE 11-23: CLOCK SYNCHRONIZATION
CLK
1
CLK
2
SCL
wait
state
start counting
HIGH period
counter
reset
Applicable Devices
72 73 73A 74 74A 76 77
鐩搁棞(gu膩n)PDF璩囨枡 |
PDF鎻忚堪 |
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| 1-192447-8 | LOUVERTAC BAND SOCKET 9/16-18 |
鐩搁棞(gu膩n)浠ｇ悊鍟�/鎶€琛�(sh霉)鍙冩暩(sh霉) |
鍙冩暩(sh霉)鎻忚堪 |
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| PIC16C770-I/P | 鍒堕€犲晢:Microchip Technology Inc 鍔熻兘鎻忚堪:IC 8BIT CMOS MCU 16C770 DIP20 |
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