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參數(shù)資料
| 型號： | X9520 |
| 英文描述： | Triple DCP, POR, 2 kbit EEPROM Memory, Dual Voltage Monitors(3個DCP,上電復(fù)位,2k位串行EEPROM,分別的雙電壓監(jiān)控器端電壓-1.0~+15V) |
| 中文描述： | 三氯酚，葡萄牙，2千比特EEPROM存儲器，雙電壓監(jiān)視器（3個副處長，上電復(fù)位和2K位串行EEPROM中，分別的雙電壓監(jiān)控器端電壓-1.0?15V的） |
| 文件頁數(shù)： | 10/34頁 |
| 文件大小： | 210K |
| 代理商： | X9520 |
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REV 1.3 4/13/04
Characteristics subject to change without notice.
10 of 34
www.xicor.com
X9520
– Preliminary Information
finally, the master issues a STOP condition. The Data
Byte read in this operation, corresponds to the “wiper
position” (value of the WCR) of the DCP pointed to by bits
P1 and P0.
It should be noted that when reading out the data byte for
DCP0 (64 Tap), the upper two most significant bits are
“unknown” bits. For DCP1 (100 Tap), the upper most sig-
nificant bit is an “unknown”. For DCP2 (256 Tap) however,
all bits of the data byte are relevant (See Figure 10).
2 kbit EEPROM ARRAY
Operations on the 2 kbit EEPROM Array, consist of either
1, 2 or 3 byte command sequences. All operations on the
EEPROM must begin with the Device Type Identifier of
the Slave Address set to 1010000. A Read or Write to the
EEPROM is selected by setting the LSB of the Slave
Address to the appropriate value R/W (Read = “1”,
Write=”0”).
In some cases when performing a Read or Write to the
EEPROM, an Address Byte may also need to be speci-
fied. This Address Byte can contain the values 00h to
FFh.
EEPROM Byte Write
In order to perform an EEPROM Byte Write operation to
the EEPROM array, the Write Enable Latch (WEL) bit of
the CONSTAT Register must first be set (See “BL1, BL0:
Block Lock protection bits - (Nonvolatile)” on page 13.)
For a write operation, the X9520 requires the Slave
Address Byte and an Address Byte. This gives the master
access to any one of the words in the array. After receipt
of the Address Byte, the X9520 responds with an
ACKNOWLEDGE, and awaits the next eight bits of data.
After receiving the 8 bits of the Data Byte, it again
responds with an ACKNOWLEDGE. The master then ter-
minates the transfer by generating a STOP condition, at
which time the X9520 begins the internal write cycle to
the nonvolatile memory (See Figure 11). During this inter-
nal write cycle, the X9520 inputs are disabled, so it does
not respond to any requests from the master. The SDA
output is at high impedance. A write to a region of
EEPROM memory which has been protected with the
Block-Lock feature (See “BL1, BL0: Block Lock protection
bits - (Nonvolatile)” on page 13.), suppresses the
ACKNOWLEDGE bit after the Address Byte.
EEPROM Page Write
In order to perform an EEPROM Page Write operation to
the EEPROM array, the Write Enable Latch (WEL) bit of
the CONSTAT Register must first be set (See “BL1, BL0:
Block Lock protection bits - (Nonvolatile)” on page 13.)
The X9520 is capable of a page write operation. It is initi-
ated in the same manner as the byte write operation; but
instead of terminating the write cycle after the first data
byte is transferred, the master can transmit an unlimited
number of 8-bit bytes. After the receipt of each byte, the
X9520 responds with an ACKNOWLEDGE, and the
address is internally incremented by one. The page
address remains constant. When the counter reaches the
end of the page, it “rolls over” and goes back to ‘0’ on the
same page.
For example, if the master writes 12 bytes to the page
starting at location 11 (decimal), the first 5 bytes are writ-
ten to locations 11 through 15, while the last 7 bytes are
written to locations 0 through 6. Afterwards, the address
counter would point to location 7. If the master supplies
more than 16 bytes of data, then new data overwrites the
previous data, one byte at a time (See Figure 13).
S
t
a
r
t
S
t
o
p
Slave
Address
Address
Byte
Data
(n)
A
C
K
A
C
K
A
C
K
SDA Bus
Signals from
the Slave
Signals from
the Master
Data
(1)
A
C
K
(2 < n < 16)
Figure 12. EEPROM Page Write Operation
1 0 1 0 0 00 0
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相關(guān)代理商/技術(shù)參數(shù) |
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| X9520B20I-A | 功能描述:IC LASR CTRLR 3CHAN 5.5V 20TSSOP RoHS:是 類別:集成電路 (IC) >> PMIC - 激光驅(qū)動器 系列:- 產(chǎn)品培訓(xùn)模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標(biāo)準(zhǔn)包裝:60 系列:- 類型:激光二極管驅(qū)動器 數(shù)據(jù)速率:- 通道數(shù):4 電源電壓:3.3V 電流 - 電源:- 電流 - 調(diào)制:- 電流 - 偏置:- 工作溫度:0°C ~ 70°C 封裝/外殼:40-TQFN 裸露焊盤 供應(yīng)商設(shè)備封裝:40-TQFN EP 包裝:托盤 安裝類型:表面貼裝 |
| X9520B20I-AT1 | 功能描述:IC LASR CTRLR 3CHAN 5.5V 20TSSOP RoHS:是 類別:集成電路 (IC) >> PMIC - 激光驅(qū)動器 系列:- 產(chǎn)品培訓(xùn)模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標(biāo)準(zhǔn)包裝:60 系列:- 類型:激光二極管驅(qū)動器 數(shù)據(jù)速率:- 通道數(shù):4 電源電壓:3.3V 電流 - 電源:- 電流 - 調(diào)制:- 電流 - 偏置:- 工作溫度:0°C ~ 70°C 封裝/外殼:40-TQFN 裸露焊盤 供應(yīng)商設(shè)備封裝:40-TQFN EP 包裝:托盤 安裝類型:表面貼裝 |
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