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| 鍨嬭櫉锛� | PIC16F877A-I/L |
| 寤犲晢锛� | Microchip Technology |
| 鏂囦欢闋佹暩(sh霉)锛� | 231/234闋� |
| 鏂囦欢澶�?銆�?/td> | 0K |
| 鎻忚堪锛� | IC MCU FLASH 8KX14 EE 44PLCC |
| 鐢�(ch菐n)鍝佸煿瑷撴ā濉婏細 | Asynchronous Stimulus 8-bit PIC® Microcontroller Portfolio |
| 妯欐簴鍖呰锛� | 27 |
| 绯诲垪锛� | PIC® 16F |
| 鏍稿績铏曠悊鍣細 | PIC |
| 鑺珨灏哄锛� | 8-浣� |
| 閫熷害锛� | 20MHz |
| 閫ｉ€氭€э細 | I²C锛孲PI锛孶ART/USART |
| 澶栧湇瑷倷锛� | 娆犲妾㈡脯/寰╀綅锛孭OR锛孭WM锛學DT |
| 杓稿叆/杓稿嚭鏁�(sh霉)锛� | 33 |
| 绋嬪簭瀛樺劜鍣ㄥ閲忥細 | 14KB锛�8K x 14锛� |
| 绋嬪簭瀛樺劜鍣ㄩ鍨嬶細 | 闁冨瓨 |
| EEPROM 澶�?銆�?/td> | 256 x 8 |
| RAM 瀹归噺锛� | 368 x 8 |
| 闆诲 - 闆绘簮 (Vcc/Vdd)锛� | 4 V ~ 5.5 V |
| 鏁�(sh霉)鎿�(j霉)杞�(zhu菐n)鎻涘櫒锛� | A/D 8x10b |
| 鎸暕鍣ㄥ瀷锛� | 澶栭儴 |
| 宸ヤ綔婧害锛� | -40°C ~ 85°C |
| 灏佽/澶栨锛� | 44-LCC锛圝 褰㈠紩绶氾級 |
| 鍖呰锛� | 绠′欢 |
| 鐢�(ch菐n)鍝佺洰閷勯爜闈細 | 641 (CN2011-ZH PDF) |
| 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 |
| 鍏跺畠鍚嶇ū锛� | PIC16F877AI/L |
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PIC16F87XA
DS39582B-page 94
2003 Microchip Technology Inc.
9.4.5
GENERAL CALL ADDRESS
SUPPORT
The addressing procedure for the I2C bus is such that
the first byte after the Start condition usually determines
which device will be the slave addressed by the master.
The exception is the general call address which can
address all devices. When this address is used, all
devices should, in theory, respond with an Acknowledge.
The general call address is one of eight addresses
reserved for specific purposes by the I2C protocol. It
consists of all 鈥�0鈥檚 with R/W = 0.
The general call address is recognized when the Gen-
eral Call Enable bit (GCEN) is enabled (SSPCON2<7>
set). Following a Start bit detect, 8 bits are shifted into
the SSPSR and the address is compared against the
SSPADD. It is also compared to the general call
address and fixed in hardware.
If the general call address matches, the SSPSR is
transferred to the SSPBUF, the BF flag bit is set (eighth
bit) and on the falling edge of the ninth bit (ACK bit), the
SSPIF interrupt flag bit is set.
When the interrupt is serviced, the source for the inter-
rupt can be checked by reading the contents of the
SSPBUF. The value can be used to determine if the
address was device specific or a general call address.
In 10-bit mode, the SSPADD is required to be updated
for the second half of the address to match and the UA
bit is set (SSPSTAT<1>). If the general call address is
sampled when the GCEN bit is set, while the slave is
configured in 10-bit Address mode, then the second
half of the address is not necessary, the UA bit will not
be set and the slave will begin receiving data after the
Acknowledge (Figure 9-15).
FIGURE 9-15:
SLAVE MODE GENERAL CALL ADDRESS SEQUENCE
(7 OR 10-BIT ADDRESS MODE)
SDA
SCL
S
SSPIF
BF (SSPSTAT<0>)
SSPOV (SSPCON<6>)
Cleared in software
SSPBUF is read
R/W = 0
ACK
General Call Address
Address is compared to general call address.
GCEN (SSPCON2<7>)
Receiving Data
ACK
12
3
4
5
6
7
8
9
1
2
3
4
5
67
8
9
D7
D6
D5
D4
D3
D2
D1
D0
After ACK, set interrupt.
鈥�0鈥�
鈥�1鈥�
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鐩搁棞浠ｇ悊鍟�/鎶€琛撳弮鏁�(sh霉) |
鍙冩暩(sh霉)鎻忚堪 |
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| PIC16F877AIP | 鍒堕€犲晢:Microchip Technology Inc 鍔熻兘鎻忚堪: |
| PIC16F877AIPT | 鍒堕€犲晢:Microchip Technology Inc 鍔熻兘鎻忚堪: |
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