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鍙冩暩(sh霉)璩囨枡
鍨嬭櫉(h脿o)锛� PIC18F26K80-I/MM
寤犲晢锛� Microchip Technology
鏂囦欢闋�(y猫)鏁�(sh霉)锛� 248/351闋�(y猫)
鏂囦欢澶�?銆�?/td> 0K
鎻忚堪锛� MCU PIC 64KB FLASH 28QFN
妯�(bi膩o)婧�(zh菙n)鍖呰锛� 61
绯诲垪锛� PIC® XLP™ 18F
鏍稿績铏曠悊鍣細 PIC
鑺珨灏哄锛� 8-浣�
閫熷害锛� 64MHz
閫ｉ€氭€э細 ECAN锛孖²C锛孡IN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)浣嶏紝LVD锛孭OR锛孭WM锛學DT
杓稿叆/杓稿嚭鏁�(sh霉)锛� 24
绋嬪簭瀛樺劜(ch菙)鍣ㄥ閲忥細 64KB锛�32K x 16锛�
绋嬪簭瀛樺劜(ch菙)鍣ㄩ鍨嬶細 闁冨瓨
EEPROM 澶�?銆�?/td> 1K x 8
RAM 瀹归噺锛� 3.6K x 8
闆诲 - 闆绘簮 (Vcc/Vdd)锛� 1.8 V ~ 5.5 V
鏁�(sh霉)鎿�(j霉)杞�(zhu菐n)鎻涘櫒锛� A/D 8x12b
鎸暕鍣ㄥ瀷锛� 鍏�(n猫i)閮�
宸ヤ綔婧害锛� -40°C ~ 85°C
灏佽/澶栨锛� 28-VQFN 瑁搁湶鐒婄洡
鍖呰锛� 绠′欢
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2010-2012 Microchip Technology Inc.
DS39977F-page 321
PIC18F66K80 FAMILY
21.4.9
I2C MASTER MODE REPEATED
START CONDITION TIMING
A Repeated Start condition occurs when the RSEN bit
(SSPCON2<1>) is programmed high and the I2C logic
module is in the Idle state. When the RSEN bit is set,
the SCL pin is asserted low. When the SCL pin is
sampled low, the Baud Rate Generator is loaded with
the contents of SSPADD<5:0> and begins counting.
The SDA pin is released (brought high) for one Baud
Rate Generator count (TBRG). When the Baud Rate
Generator times out, and if SDA is sampled high, the
SCL pin will be deasserted (brought high). When SCL
is sampled high, the Baud Rate Generator is reloaded
with the contents of SSPADD<6:0> and begins
counting. SDA and SCL must be sampled high for one
TBRG. This action is then followed by assertion of the
SDA pin (SDA = 0) for one TBRG while SCL is high.
Following this, the RSEN bit (SSPCON2<1>) will be
automatically cleared and the Baud Rate Generator will
not be reloaded, leaving the SDA pin held low. As soon
as a Start condition is detected on the SDA and SCL
pins, the S bit (SSPSTAT<3>) will be set. The SSPIF bit
will not be set until the Baud Rate Generator has timed
out.
Immediately following the SSPIF bit getting set, the user
may write the SSPBUF with the 7-bit address in 7-bit
mode or the default first address in 10-bit mode. After the
first eight bits are transmitted and an ACK is received,
the user may then transmit an additional eight bits of
address (10-bit mode) or eight bits of data (7-bit mode).
21.4.9.1
WCOL Status Flag
If the user writes the SSPBUF when a Repeated Start
sequence is in progress, the WCOL is set and the
contents of the buffer are unchanged (the write doesn鈥檛
occur).
FIGURE 21-22:
REPEATED START CONDITION WAVEFORM
Note 1:
If RSEN is programmed while any other
event is in progress, it will not take effect.
2:
A bus collision during the Repeated Start
condition occurs if:
SDA is sampled low when SCL goes
from low-to-high.
SCL goes low before SDA is
asserted low. This may indicate that
another master is attempting to
transmit a data 鈥�1鈥�.
Note:
Because queueing of events is not
allowed, writing of the lower 5 bits of
SSPCON2 is disabled until the Repeated
Start condition is complete.
SDA
SCL
Sr = Repeated Start
Write to SSPCON2 occurs here:
Write to SSPBUF occurs here
on falling edge of ninth clock,
end of XMIT
At completion of Start bit,
hardware clears RSEN bit
1st bit
S bit set by hardware
TBRG
SDA = 1,
SCL (no change).
SCL = 1
and sets SSPIF
RSEN bit set by hardware
TBRG
鐩搁棞(gu膩n)PDF璩囨枡
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PIC18F26K80T-I/SO 鍔熻兘鎻忚堪:8浣嶅井鎺у埗鍣� -MCU 64KB FL 4KBRM 16MIPS 12bit ADC CTMU RoHS:鍚� 鍒堕€犲晢:Silicon Labs 鏍稿績:8051 铏曠悊鍣ㄧ郴鍒�:C8051F39x 鏁�(sh霉)鎿�(j霉)绺界窔瀵害:8 bit 鏈€澶ф檪(sh铆)閻橀牷鐜�:50 MHz 绋嬪簭瀛樺劜(ch菙)鍣ㄥぇ灏�:16 KB 鏁�(sh霉)鎿�(j霉) RAM 澶у皬:1 KB 鐗囦笂 ADC:Yes 宸ヤ綔闆绘簮闆诲:1.8 V to 3.6 V 宸ヤ綔婧害鑼冨湇:- 40 C to + 105 C 灏佽 / 绠遍珨:QFN-20 瀹夎棰�(f膿ng)鏍�:SMD/SMT
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PIC18F27J13-I/ML 鍔熻兘鎻忚堪:8浣嶅井鎺у埗鍣� -MCU 128KB Flash 4KB RAM 12MIPS nanoWatt RoHS:鍚� 鍒堕€犲晢:Silicon Labs 鏍稿績:8051 铏曠悊鍣ㄧ郴鍒�:C8051F39x 鏁�(sh霉)鎿�(j霉)绺界窔瀵害:8 bit 鏈€澶ф檪(sh铆)閻橀牷鐜�:50 MHz 绋嬪簭瀛樺劜(ch菙)鍣ㄥぇ灏�:16 KB 鏁�(sh霉)鎿�(j霉) RAM 澶у皬:1 KB 鐗囦笂 ADC:Yes 宸ヤ綔闆绘簮闆诲:1.8 V to 3.6 V 宸ヤ綔婧害鑼冨湇:- 40 C to + 105 C 灏佽 / 绠遍珨:QFN-20 瀹夎棰�(f膿ng)鏍�:SMD/SMT
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*鍨嬭櫉(h脿o) *鏁�(sh霉)閲� 寤犲晢 鎵硅櫉(h脿o) 灏佽
娣诲姞鏇村閲囪臣(g貌u)

鎴戠殑鑱�(li谩n)绯绘柟寮�

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    • 閲囪喘
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