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参数资料
| 型号： | RTC-62423B-0 |
| 厂商： | EPSON TOYOCOM CORP |
| 元件分类： | 时钟/数据恢复及定时提取 |
| 英文描述： | REAL TIME CLOCK, PDSO24 |
| 封装： | SOP-24 |
| 文件页数： | 9/24页 |
| 文件大小： | 195K |
| 代理商： | RTC-62423B-0 |
RTC - 62421 / 62423
Page - 14
MQ152-05
2. Read /write of S1 to W registers
Use one of the procedures shown below to access registers other than the control registers (CD, CE, and CF) while the RTC is
operating. Note that the control registers can be accessed regardless of the status of the BUSY bit.
Read or write when the HOLD bit is used
NO
YES
HOLD bit
← 1
HOLD bit
← 0
Read the BUSY bit
BUSY bit = 0?
From previous process
Read required digit data or
set the time
HOLD bit
← 0
To next process
Timer (*1)
(*1) Within the RTC, the BUSY bit returns
to 0 when the HOLD bit becomes 0.
However, the status of the HOLD bit is
sampled at a frequency of approxi-
mately 16 kHz to determine whether
the BUSY bit should be cleared, so if
the period during which the HOLD bit
is 0 is extremely short, the clearing of
the BUSY bit could be delayed. To
prevent this, make sure that the period
during which the HOLD bit is 0 is
maintained for about 61 s, as shown
on the right.
10
T
≈ 61 s
10
Status of HOLD bit
Read when the HOLD bit is not used (1)
A = B?
NO
YES
From previous process
Read the required digit data
(1st time)
←
Store the read data (A
data)
Read the required digit data
(2nd time)
←
Store the read data (B
data)
To next process
This operation involves reading the same digit twice and
comparing the read values. This is to avoid the problem of reading
unstable data that would occur if the data was read while the RTC
was incrementing the count.
相关PDF资料 |
PDF描述 |
|---|---|
| RTC-72421A | 0 TIMER(S), REAL TIME CLOCK, PDIP18 |
| RTC-72421B | 0 TIMER(S), REAL TIME CLOCK, PDIP18 |
| RTC-72423A-0 | 0 TIMER(S), REAL TIME CLOCK, PDSO24 |
| RTC-72423B-0 | REAL TIME CLOCK, PDSO24 |
| RTC-72423A-0 | 0 TIMER(S), REAL TIME CLOCK, PDSO24 |
相关代理商/技术参数 |
参数描述 |
|---|---|
| RTC63421 | 制造商:未知厂家 制造商全称:未知厂家 功能描述:4-bit MULTIFUNCTIONAL REAL TIME CLOCK MODULE |
| RTC-63421 | 制造商:未知厂家 制造商全称:未知厂家 功能描述:4-bit MULTIFUNCTIONAL REAL TIME CLOCK MODULE |
| RTC-63421A | 制造商:未知厂家 制造商全称:未知厂家 功能描述:Real-Time Clock |
| RTC-63421B | 功能描述:IC RTC SER +-50PPM 18-DIP RoHS:否 类别:集成电路 (IC) >> 时钟/计时 - 实时时钟 系列:- 产品培训模块:Obsolescence Mitigation Program 标准包装:1 系列:- 类型:时钟/日历 特点:警报器，闰年，SRAM 存储容量:- 时间格式:HH:MM:SS（12/24 小时） 数据格式:YY-MM-DD-dd 接口:SPI 电源电压:2 V ~ 5.5 V 电压 - 电源，电池:- 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:8-WDFN 裸露焊盘 供应商设备封装:8-TDFN EP 包装:管件 |
| RTC-63421M | 制造商:未知厂家 制造商全称:未知厂家 功能描述:4-bit MULTIFUNCTIONAL REAL TIME CLOCK MODULE |
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