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参数资料
| 型号： | DS32C35-33#T&R |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 11/22页 |
| 文件大小： | 0K |
| 描述： | IC RTC ACCURATE I2C 3.3V 20-SOIC |
| 产品变化通告： | Product Discontinuation 28/Nov/2011 |
| 标准包装： | 1,000 |
| 类型： | 时钟/日历 |
| 特点： | 警报器，FRAM，闰年，方波输出，TCXO/晶体 |
| 存储容量： | 8KB |
| 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 ~ 3.63 V |
| 电压 - 电源，电池： | 2.3 V ~ 3.6 V |
| 工作温度： | 0°C ~ 70°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 W |
| 包装： | 带卷 (TR) |
2) Slave transmitter mode (DS32B35/DS32C35 read
mode): The first byte is received and handled as in
the slave receiver mode. However, in this mode, the
direction bit indicates that the transfer direction is
reversed. The device transmits serial data on SDA
while the serial clock is input on SCL. START and
STOP conditions are recognized as the beginning
and end of a serial transfer (see Figure 4). The slave
address byte is the first byte received after the mas-
ter generates the START condition. The slave
address byte contains one of the 7-bit device
addresses. The slave address is 1101000 for the
RTC. For the DS32B35 FRAM, the first four bits are
1010, and the next three bits select one of eight
blocks of data (see Table 2). Each slave address is
followed by the direction bit (R/W), which is one for a
read. After receiving and decoding the slave address
byte, the device outputs an acknowledge on the SDA
line. The device then begins to transmit data starting
with the register address pointed to by the register
pointer. If the register pointer is not written to before
the initiation of a read mode, the first address that is
read is the last one stored in the register pointer. The
device must receive a "not acknowledge" to end a
read. The register pointer can be set prior to a data
read by initiating a slave receiver mode sequence,
with no data bytes transmitted after the register
address data.
DS32B35/DS32C35
Accurate I2C RTC with Integrated
TCXO/Crystal/FRAM
____________________________________________________________________
19
...
A
XXXXXXXX
A
1101000
S
0
XXXXXXXX
A
XXXXXXXX
A
XXXXXXXX
A
P
<SLAVE ADDRESS> <R/W>
<WORD ADDRESS (n)>
<DATA (n)>
<DATA (n + 1)>
<DATA (n + X)
S - START
A - ACKNOWLEDGE
P - STOP
R/W - READ/WRITE OR DIRECTION BIT ADDRESS = D0h
DATA TRANSFERRED
(X + 1 BYTES + ACKNOWLEDGE)
MASTER TO SLAVE
SLAVE TO MASTER
Figure 3. Data Write—RTC Slave Receiver Mode
...
A
XXXXXXXX
A
1101000
S
1
XXXXXXXX
A
XXXXXXXX
A
XXXXXXXX
A
P
<SLAVE ADDRESS> <R/W>
<DATA (n)>
<DATA (n + 1)>
<DATA (n + 2)>
<DATA (n + X)>
S - START
A - ACKNOWLEDGE
P - STOP
A - NOT ACKNOWLEDGE
R/W - READ/WRITE OR DIRECTION BIT ADDRESS = D1h
DATA TRANSFERRED
(X + 1 BYTES + ACKNOWLEDGE)
NOTE: LAST DATA BYTE IS FOLLOWED BY A NOT ACKNOWLEDGE (A) SIGNAL.
MASTER TO SLAVE
SLAVE TO MASTER
Figure 4. Data Read—RTC Slave Transmitter Mode
A
A7A6A5A4A3A2A1A0
A
1010A10A9A8
S
0
XXXXXXXX
A
XXXXXXXX
A
XXXXXXXX
A
P
<SLAVE ADDRESS> <R/W> <WORD ADDRESS (n)>
<DATA (n + 1)
<DATA (n + 2)>
<DATA (n + X)>
S - START
A - ACKNOWLEDGE
P - STOP
R/W - READ/WRITE BIT
DATA TRANSFERRED
(X + 1 BYTES + ACKNOWLEDGE)
...
MASTER TO SLAVE
SLAVE TO MASTER
Figure 5. Data Write—DS32B35 FRAM Slave Receiver Mode
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