參數(shù)資料
型號: MTA85811S-04I/SS
元件分類: 微控制器/微處理器
英文描述: 8-BIT, OTPROM, 4 MHz, RISC MICROCONTROLLER, PDSO20
封裝: 0.209 INCH, PLASTIC, SSOP-20
文件頁數(shù): 49/72頁
文件大?。?/td> 760K
代理商: MTA85811S-04I/SS
1995 Microchip Technology Inc.
DS40115C-page 53
MTA85XXX
17.1.6
SLAVE ADDRESS
The
24LC01B/02B
(EEPROM)
are
software-
compatible with older devices such as the 24C01A,
24C02A, 24LC01, and the 24LC02. A single 24LC02B
can be used in place of two 24LC01’s, for example,
without any modifications to software. The "chip select"
portion of the control byte is a don't care.
After generating a START condition, the bus master
transmits the slave address consisting of a 4-bit device
code (1010) for the EEPROM, followed by three don't
care bits.
The eighth bit of slave address determines if the master
device wants to read or write to the EEPROM
(Figure 17-3).
The EEPROM monitors the bus for its corresponding
slave
address
all
the
time.
It
generates
an
acknowledge bit if the slave address was true and it is
not in a programming mode.
FIGURE 17-2: EEPROM CONTROL CODES
FIGURE 17-3: CONTROL BYTE
ALLOCATION
Operation
Control
Code
Chip
Select
R/W
Read
1010
xxx
1
Write
1010
xxx
0
1X
X
0
1
0
SLAVE ADDRESS
START
READ/WRITE
A
R/W
X = don’t care
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