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參數(shù)資料
| 型號(hào)： | DS1388Z-3+T&R |
| 廠商： | Maxim Integrated Products |
| 文件頁數(shù)： | 6/19頁 |
| 文件大?。?/td> | 0K |
| 描述： | IC RTC I2C W/CHARGER 8-SOIC |
| 產(chǎn)品培訓(xùn)模塊： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 標(biāo)準(zhǔn)包裝： | 2,500 |
| 類型： | 時(shí)鐘/日歷 |
| 特點(diǎn)： | EEPROM，閏年，監(jiān)控器，涓流充電器，監(jiān)視計(jì)時(shí)器 |
| 存儲(chǔ)容量： | 512B |
| 時(shí)間格式： | HH:MM:SS:hh（12/24 小時(shí)） |
| 數(shù)據(jù)格式： | YY-MM-DD-dd |
| 接口： | I²C，2 線串口 |
| 電源電壓： | 2.7 V ~ 3.3 V |
| 電壓 - 電源，電池： | 1.3 V ~ 5.5 V |
| 工作溫度： | -40°C ~ 85°C |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 8-SOIC（0.154"，3.90mm 寬） |
| 供應(yīng)商設(shè)備封裝： | 8-SOIC |
| 包裝： | 帶卷 (TR) |
I2C RTC/Supervisor with Trickle Charger
and 512 Bytes EEPROM
14
Maxim Integrated
DS1388
EEPROM
The DS1388 provides 512 bytes of EEPROM organized
into two blocks of 256 bytes. Each 256-byte block is
divided into 32 pages consisting of 8 bytes per page.
The EEPROM can be written one page at a time. Page
write operations are limited to writing bytes within a sin-
gle physical page, regardless of the number of bytes
actually being written. Physical page boundaries start at
addresses that are integer multiples of the page size (8
bytes) and end at addresses that are integer multiples
of [page size -1]. For example, page 0 contains word
addresses 00h to 07h. Similarly, page 1 contains word
addresses 08h to 0Fh. If a page write command
attempts to write across a physical page boundary, the
result is that the data wraps around to the beginning of
the current page (overwriting data previously stored
there), instead of being written to the next page as
might be expected. Therefore, it is necessary for the
application software to prevent page write operations
that would attempt to cross a page boundary.
I2C Serial Data Bus
The DS1388 supports a bidirectional I2C bus and data
transmission protocol. A device that sends data onto
the bus is defined as a transmitter and a device receiv-
ing data is defined as a receiver. The device that con-
trols the message is called a master. The devices that
are controlled by the master are slaves. The bus must
be controlled by a master device that generates the
serial clock (SCL), controls the bus access, and gener-
ates the START and STOP conditions. The DS1388
operates as a slave on the I2C bus. Connections to the
bus are made through the open-drain I/O lines SDA
and SCL. Within the bus specifications, a standard
mode (100kHz maximum clock rate) and a fast mode
(400kHz maximum clock rate) are defined. The DS1388
works in both modes.
The following bus protocol has been defined (Figure 6):
Data transfer can be initiated only when the bus is
not busy.
During data transfer, the data line must remain stable
whenever the clock line is high. Changes in the data
line while the clock line is high will be interpreted as
control signals.
Accordingly, the following bus conditions have been
defined:
Bus not busy: Both data and clock lines remain
high.
Start data transfer: A change in the state of the data
line from high to low, while the clock line is high,
defines a START condition.
Stop data transfer: A change in the state of the data
line from low to high, while the clock line is high,
defines a STOP condition.
Data valid: The state of the data line represents valid
data when, after a START condition, the data line is
stable for the duration of the high period of the clock
signal. The data on the line must be changed during
the low period of the clock signal. There is one clock
pulse per bit of data.
R1
250
Ω
R2
2k
Ω
R3
4k
Ω
VCC
VBACKUP
BIT 7
BIT 6
BIT 5
BIT 4
BIT 3
BIT 2
BIT 1
BIT 0
TCS3
TCS2
TCS1
TCS0
DS1
DS0
ROUT1
ROUT0
TRICKLE-CHARGE REGISTER (00Ah)
1 0F 16 SELECT
NOTE: ONLY 1010b ENABLES CHARGER
1 OF 2
SELECT
1 OF 3
SELECT
TCS0-3 = TRICKLE-CHARGE SELECT
DS0-1 = DIODE SELECT
ROUT0-1 = RESISTOR SELECT
Figure 5. Programmable Trickle Charger
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| DS1388Z-5 | 功能描述:實(shí)時(shí)時(shí)鐘 RoHS:否 制造商:Microchip Technology 功能:Clock, Calendar. Alarm RTC 總線接口:I2C 日期格式:DW:DM:M:Y 時(shí)間格式:HH:MM:SS RTC 存儲(chǔ)容量:64 B 電源電壓-最大:5.5 V 電源電壓-最小:1.8 V 最大工作溫度:+ 85 C 最小工作溫度: 安裝風(fēng)格:Through Hole 封裝 / 箱體:PDIP-8 封裝:Tube |
| DS1388Z-5+ | 功能描述:實(shí)時(shí)時(shí)鐘 I2C RTC/Supervisor w/Trickle Charger RoHS:否 制造商:Microchip Technology 功能:Clock, Calendar. Alarm RTC 總線接口:I2C 日期格式:DW:DM:M:Y 時(shí)間格式:HH:MM:SS RTC 存儲(chǔ)容量:64 B 電源電壓-最大:5.5 V 電源電壓-最小:1.8 V 最大工作溫度:+ 85 C 最小工作溫度: 安裝風(fēng)格:Through Hole 封裝 / 箱體:PDIP-8 封裝:Tube |
| DS1390 | 制造商:MAXIM 制造商全稱:Maxim Integrated Products 功能描述:Low-Voltage SPI/3-Wire RTCs with Trickle Charger |
| DS1390_07 | 制造商:MAXIM 制造商全稱:Maxim Integrated Products 功能描述:Low-Voltage SPI/3-Wire RTCs with Trickle Charger |
| DS1390_09 | 制造商:MAXIM 制造商全稱:Maxim Integrated Products 功能描述:Low-Voltage SPI/3-Wire RTCs with Trickle Charger |
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