参数资料
| 型号： | ISL12022MAIBZ |
| 厂商： | Intersil |
| 文件页数： | 19/31页 |
| 文件大小： | 0K |
| 描述： | IC RTC/CALENDAR TEMP SNSR 20SOIC |
| 产品培训模块： | Solutions for Industrial Control Applications |
| 标准包装： | 38 |
| 类型： | 时钟/日历 |
| 特点： | 警报器，夏令时，闰年，SRAM |
| 存储容量： | 128B |
| 时间格式： | HH:MM:SS（12/24 小时） |
| 数据格式： | YY-MM-DD-dd |
| 接口： | I²C，2 线串口 |
| 电源电压： | 2.7 V ~ 5.5 V |
| 电压 - 电源，电池： | 1.8 V ~ 5.5 V |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 20-SOIC（0.295"，7.50mm 宽） |
| 供应商设备封装： | 20-SOIC |
| 包装： | 管件 |
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ISL12022MA
26
FN7575.5
September 5, 2012
An acknowledge (ACK) is a software convention used to indicate
a successful data transfer. The transmitting device, either master
or slave, releases the SDA bus after transmitting eight bits.
During the ninth clock cycle, the receiver pulls the SDA line LOW
to acknowledge the reception of the eight bits of data (see Figure
17).
The ISL12022MA responds with an ACK after recognition of a
START condition followed by a valid Identification Byte, and once
again, after successful receipt of an Address Byte. The
ISL12022MA also responds with an ACK after receiving a Data
Byte of a write operation. The master must respond with an ACK
after receiving a Data Byte of a read operation.
Device Addressing
Following a start condition, the master must output a Slave
Address Byte. The 7 MSBs are the device identifiers. These bits
are “1101111” for the RTC registers and “1010111” for the User
SRAM.
The last bit of the Slave Address Byte defines a read or write
operation to be performed. When this R/W bit is a “1”, a read
operation is selected. A “0” selects a write operation (refer to
Figure 19).
After loading the entire Slave Address Byte from the SDA bus, the
ISL12022MA compares the device identifier and device select
bits with “1101111” or “1010111”. Upon a correct compare, the
device outputs an acknowledge on the SDA line.
Following the Slave Byte is a one byte word address. The word
address is either supplied by the master device or obtained from
an internal counter. On power-up, the internal address counter is
set to address 00h, so a current address read starts at address
00h. When required, as part of a random read, the master must
supply the 1 Word Address Bytes, as shown in Figure 20.
In a random read operation, the slave byte in the “dummy write”
portion must match the slave byte in the “read” section. For a
random read of the Control/Status Registers, the slave byte must
be “1101111x” in both places.
Write Operation
A Write operation requires a START condition, followed by a valid
Identification Byte, a valid Address Byte, a Data Byte, and a STOP
condition. After each of the three bytes, the ISL12022MA
responds with an ACK. At this time, the I2C interface enters a
standby state.
FIGURE 17. ACKNOWLEDGE RESPONSE FROM RECEIVER
FIGURE 18. BYTE WRITE SEQUENCE (SLAVE ADDRESS FOR CSR SHOWN)
SDA OUTPUT FROM
TRANSMITTER
SDA OUTPUT FROM
RECEIVER
8
1
9
START
ACK
SCL FROM
MASTER
HIGH IMPEDANCE
S
T
A
R
T
S
T
O
P
IDENTIFICATION
BYTE
DATA
BYTE
A
C
K
SIGNALS FROM THE
MASTER
SIGNALS FROM
THE ISL12022MA
A
C
K
10
0
11
A
C
K
WRITE
SIGNAL AT SDA
000 0
111
ADDRESS
BYTE
FIGURE 19. SLAVE ADDRESS, WORD ADDRESS, AND DATA BYTES
SLAVE ADDRESS
BYTE
D7
D6
D5
D2
D4
D3
D1
D0
A0
A7
A2
A4
A3
A1
DATA BYTE
A6
A5
1
10
1
R/W
1
WORD ADDRESS
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| ISL12022MAIBZ-T | 功能描述:实时时钟 REAL TIME CLK ENHANC CD ESD & MOISTURESIS RoHS:否 制造商:Microchip Technology 功能:Clock, Calendar. Alarm RTC 总线接口:I2C 日期格式:DW:DM:M:Y 时间格式:HH:MM:SS RTC 存储容量:64 B 电源电压-最大:5.5 V 电源电压-最小:1.8 V 最大工作温度:+ 85 C 最小工作温度: 安装风格:Through Hole 封装 / 箱体:PDIP-8 封装:Tube |
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| ISL12022MIBZ | 功能描述:实时时钟 REAL TIME CLK & TEMP COMPENSATED CRYSTAL RoHS:否 制造商:Microchip Technology 功能:Clock, Calendar. Alarm RTC 总线接口:I2C 日期格式:DW:DM:M:Y 时间格式:HH:MM:SS RTC 存储容量:64 B 电源电压-最大:5.5 V 电源电压-最小:1.8 V 最大工作温度:+ 85 C 最小工作温度: 安装风格:Through Hole 封装 / 箱体:PDIP-8 封装:Tube |
| ISL12022MIBZ-EVAL | 功能描述:电源管理IC开发工具 ISL12022MIBZ-EVAL DEMO BRD RoHS:否 制造商:Maxim Integrated 产品:Evaluation Kits 类型:Battery Management 工具用于评估:MAX17710GB 输入电压: 输出电压:1.8 V |
| ISL12022MIBZR5421 | 功能描述:实时时钟 REAL TIME CLK W/MFK IMPROVED ESD AIR RoHS:否 制造商:Microchip Technology 功能:Clock, Calendar. Alarm RTC 总线接口:I2C 日期格式:DW:DM:M:Y 时间格式:HH:MM:SS RTC 存储容量:64 B 电源电压-最大:5.5 V 电源电压-最小:1.8 V 最大工作温度:+ 85 C 最小工作温度: 安装风格:Through Hole 封装 / 箱体:PDIP-8 封装:Tube |
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