参数资料
型号: DS1374U-33+T&R
厂商: Maxim Integrated Products
文件页数: 6/18页
文件大小: 0K
描述: IC RTC I2C W/CHARGER 10-USOP
产品培训模块: Lead (SnPb) Finish for COTS
Obsolescence Mitigation Program
标准包装: 3,000
类型: 二进制计数器
特点: 警报器,方波输出,涓流充电器,监视计时器
时间格式: 二进制
数据格式: 二进制
接口: I²C,2 线串口
电源电压: 2.97 V ~ 5.5 V
电压 - 电源,电池: 1.3 V ~ 5.5 V
工作温度: -40°C ~ 85°C
安装类型: 表面贴装
封装/外壳: 10-TFSOP,10-MSOP(0.118",3.00mm 宽)
供应商设备封装: 10-µMAX
包装: 带卷 (TR)
DS1374
I2C, 32-Bit Binary Counter Watchdog RTC with
Trickle Charger and Reset Input/Output
14
____________________________________________________________________
I2C Serial Data Bus
The DS1374 supports the I2C bus protocol. A device
that sends data onto the bus is defined as a transmitter
and a device receiving data is a receiver. The device
that controls the message is called a master. The
devices that are controlled by the master are slaves. A
master device that generates the serial clock (SCL),
controls the bus access, and generates the START and
STOP conditions must control the bus. The DS1374
operates as a slave on the I2C bus. Connections to the
bus are made through the open-drain I/O lines SDA
and SCL. A standard mode (100kHz max clock rate)
and a fast mode (400kHz max clock rate) are defined
within the bus specifications. The DS1374 works in both
modes.
The following bus protocol has been defined (Figure 8):
Data transfer can be initiated only when the bus is
not busy.
During data transfer, the data line must remain sta-
ble whenever the clock line is high. Changes in the
data line while the clock line is high can be interpret-
ed as control signals.
STOP
CONDITION
OR REPEATED
START
CONDITION
REPEATED IF MORE BYTES
ARE TRANSFERED
ACK
START
CONDITION
ACK
ACKNOWLEDGEMENT
SIGNAL FROM RECEIVER
ACKNOWLEDGEMENT
SIGNAL FROM RECEIVER
SLAVE ADDRESS
MSB
SCL
SDA
R/W
DIRECTION
BIT
12
6
7
8
9
1
2
8
9
3–7
Figure 8. I2C Data Transfer Overview
BIT 7
TCS3
1 OF 16 SELECT
NOTE: ONLY 1010b
ENABLES CHARGER
1 OF 2
SELECT
VCC
VBACKUP
R1
250
Ω
TCS0-3 = TRICKLE CHARGER SELECT
DS0-1 = DIODE SELECT
TOUT0-1 = RESISTOR SELECT
R2
2k
Ω
R3
4k
Ω
1 OF 3
SELECT
BIT 6
TCS2
BIT 5
TCS1
BIT 4
TCS0
BIT 3
DS1
BIT 2
DS0
BIT 1
ROUT1
BIT 0
ROUT0
Figure 7. Programmable Trickle Charger
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