參數(shù)資料
型號(hào): 12CE673
廠商: Microchip Technology Inc.
英文描述: HookUp/Lead Wire; Conductor Size AWG:18; No. Strands x Strand Size:65 x 36; Jacket Color:Black; Conductor Material:Copper; Jacket Material:Rubber; Leaded Process Compatible:Yes; Number of Conductors:1; Outer Diameter:0.144" RoHS Compliant: Yes
中文描述: 8引腳,8位CMOS微控制器與A / D轉(zhuǎn)換器和EEPROM數(shù)據(jù)存儲(chǔ)器
文件頁(yè)數(shù): 28/116頁(yè)
文件大?。?/td> 671K
代理商: 12CE673
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PIC12CE67X
DS40181B-page 28
Preliminary
1998 Microchip Technology Inc.
FIGURE 6-1:
DATA TRANSFER SEQUENCE ON THE SERIAL BUS
FIGURE 6-2:
ACKNOWLEDGE TIMING
(A)
(B)
(C)
(D)
(A)
(C)
SCL
SDA
START
CONDITION
ADDRESS OR
ACKNOWLEDGE
VALID
DATA
ALLOWED
TO CHANGE
STOP
CONDITION
SCL
9
8
7
6
5
4
3
2
1
1
2
3
Transmitter must release the SDA line at this point
allowing the Receiver to pull the SDA line low to
acknowledge the previous eight bits of data.
Receiver must release the SDA line at this point
so the Transmitter can continue sending data.
Data from transmitter
Data from transmitter
SDA
Acknowledge
Bit
6.2
Device Addressing
After generating a START condition, the processor
transmits a control byte consisting of a EEPROM
address and a Read/Write bit that indicates what type
of operation is to be performed. The EEPROM address
consists of a 4-bit device code (1010) followed by three
don't care bits.
The last bit of the control byte determines the operation
to be performed. When set to a one a read operation is
selected, and when set to a zero a write operation is
selected. (Figure 6-3). The bus is monitored for its cor-
responding EEPROM address all the time. It generates
an acknowledge bit if the EEPROM address was true
and it is not in a programming mode.
FIGURE 6-3:
CONTROL BYTE FORMAT
1
0
1
0
X
X
X
S
ACK
R/W
Device Select
Bits
Don’t Care
Bits
EEPROM Address
Acknowledge Bit
Start Bit
Read/Write Bit
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