參數(shù)資料
型號(hào)： PIC16LCE625T-04I/SS
廠商： Microchip Technology
文件頁(yè)數(shù)： 37/100頁(yè)
文件大小： 0K
描述： IC MCU CMOS 2K OTP W/EEPRM20SSOP
標(biāo)準(zhǔn)包裝： 1,600
系列： PIC® 16C
核心處理器： PIC
芯體尺寸： 8-位
速度： 4MHz
外圍設(shè)備： 欠壓檢測(cè)/復(fù)位，POR，WDT
輸入/輸出數(shù)： 13
程序存儲(chǔ)器容量： 3.5KB（2K x 14）
程序存儲(chǔ)器類(lèi)型： OTP
EEPROM 大?。?/td> 128 x 8
RAM 容量： 128 x 8
電壓 - 電源 (Vcc/Vdd)： 2.5 V ~ 5.5 V
振蕩器型： 外部
工作溫度： -40°C ~ 85°C
封裝/外殼： 20-SSOP（0.209"，5.30mm 寬）
包裝： 帶卷 (TR)
其它名稱(chēng)： PIC16LCE625T04ISS
1999 Microchip Technology Inc.
DS40182C-page 31
PIC16CE62X
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
123
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
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
10
1
0
X
SACK
R/W
Device Select
Bits
Don’t Care
Bits
EEPROM Address
Acknowledge Bit
Start Bit
Read/Write Bit
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