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參數(shù)資料
| 型號： | ISL12028IB27Z-T |
| 廠商： | Intersil |
| 文件頁數(shù)： | 13/29頁 |
| 文件大?。?/td> | 0K |
| 描述： | IC RTC/CALENDAR EEPROM 14-SOIC |
| 產(chǎn)品培訓(xùn)模塊： | Solutions for Industrial Control Applications |
| 標(biāo)準(zhǔn)包裝： | 1 |
| 類型： | 時鐘/日歷 |
| 特點(diǎn)： | 警報器，閏年，監(jiān)控器，監(jiān)視計時器 |
| 時間格式： | HH:MM:SS（12/24 小時） |
| 數(shù)據(jù)格式： | YY-MM-DD-dd |
| 接口： | I²C，2 線串口 |
| 電源電壓： | 2.7 V ~ 5.5 V |
| 電壓 - 電源，電池： | 1.8 V ~ 5.5 V |
| 工作溫度： | -40°C ~ 85°C |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 14-SOIC（0.154"，3.90mm 寬） |
| 供應(yīng)商設(shè)備封裝： | 14-SOICN |
| 包裝： | 標(biāo)準(zhǔn)包裝 |
| 其它名稱： | ISL12028IB27Z-TDKR |
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20
FN8233.9
November 30, 2010
Afterwards, the address counter would point to location 6 on
the page that was just written. If the master supplies more
than the maximum bytes in a page, then the previously
loaded data is over-written by the new data, one byte at a
time (refer to Figure 22).The master terminates the Data
Byte loading by issuing a stop condition, which causes the
ISL12028 to begin the non-volatile write cycle. As with the
byte write operation, all inputs are disabled until completion
of the internal write cycle. Refer to Figure 21 for the address,
acknowledge, and data transfer sequence.
STOPS AND WRITE MODES
Stop conditions that terminate write operations must be sent
by the master after sending at least 1 full data byte and it’s
associated ACK signal. If a stop is issued in the middle of a
data byte, or before 1 full data byte + ACK is sent, then the
ISL12028 resets itself without performing the write. The
contents of the array are not affected.
.
ACKNOWLEDGE POLLING
Disabling of the inputs during non-volatile write cycles can
be used to take advantage of the typical 5mS write cycle
time. Once the stop condition is issued to indicate the end of
the master’s byte load operation, the ISL12028 initiates the
internal non-volatile write cycle. Acknowledge polling can
begin immediately. To do this, the master issues a start
condition followed by the Memory Array Slave Address Byte
for a write or read operation (AEh or AFh). If the ISL12028 is
still busy with the non-volatile write cycle then no ACK will be
returned. When the ISL12028 has completed the write
operation, an ACK is returned and the host can proceed with
the read or write operation. Refer to the flow chart in
Figure 24. Note: Do not use the CCR Slave byte (DEh or
DFh) for Acknowledge Polling.
Read Operations
There are three basic read operations: Current Address
Read, Random Read, and Sequential Read.
Current Address Read
Internally the ISL12028 contains an address counter that
maintains the address of the last word read incremented by
one. Therefore, if the last read was to address n, the next read
operation would access data from address n + 1. On power-up,
S
T
A
R
T
S
T
O
P
SLAVE
ADDRESS
WORD
ADDRESS 1
DATA
A
C
K
A
C
K
A
C
K
SDA BUS
SIGNALS FROM
THE SLAVE
SIGNALS FROM
THE MASTER
0
A
C
K
WORD
ADDRESS 0
1
00 0 0 0 0 0
FIGURE 20. BYTE WRITE SEQUENCE
WORD
ADDRESS 0
S
T
A
R
T
S
T
O
P
SLAVE
ADDRESS
WORD
ADDRESS 1
DATA
(n)
A
C
K
A
C
K
A
C
K
SDA BUS
SIGNALS FROM
THE SLAVE
SIGNALS FROM
THE MASTER
0
DATA
(1)
A
C
K
1
≤ n ≤ 16 fOR EEPROM ARRAY
1
≤ n ≤ 8 FOR CCR
1
00 0 0 0 0 0
FIGURE 21. PAGE WRITE SEQUENCE
ADDRESS
10
6 BYTES
15
6 BYTES
ADDRESS = 5
ADDRESS POINTER ENDS
FIGURE 22. WRITING 12 BYTES TO A 16-BYTE MEMORY PAGE STARTING AT ADDRESS 10
AT ADDR = 5
ISL12028, ISL12028A
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| ISL12028IB30AZ | 功能描述:實(shí)時時鐘 REAL TIME CLKRTC W/ EPROM 3 09VSET 14 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 時間格式:HH:MM:SS RTC 存儲容量: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 |
| ISL12028IB30AZ-T | 功能描述:實(shí)時時鐘 REAL TIME CLKRTC W/ EPROM 3 09VSET 14 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 時間格式:HH:MM:SS RTC 存儲容量: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 |
| ISL12028IBAZ | 功能描述:實(shí)時時鐘 REAL TIME CLKRTC W/ EPROM 4 64VSET 14 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 時間格式:HH:MM:SS RTC 存儲容量: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 |
| ISL12028IBAZ-T | 功能描述:實(shí)時時鐘 REAL TIME CLKRTC W/ EPROM 4 64VSET 14 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 時間格式:HH:MM:SS RTC 存儲容量: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 |
| ISL12028IBZ | 功能描述:實(shí)時時鐘 REAL TIME CLKRTC W/ EPROM IN 14LD 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 時間格式:HH:MM:SS RTC 存儲容量: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 |
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