Datasheet > 微控制器和处理器 > 计时器或实时时钟> X1240V8I

X1240V8I

更新时间： 2024-01-12 11:48:38

品牌	Logo	应用领域
XICOR		计时器或实时时钟微控制器和处理器外围集成电路光电二极管可编程只读存储器电动程控只读存储器电可擦编程只读存储器
页数	文件大小	规格书
19页	78K
描述
Real Time Clock/Calendar with EEPROM

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技术参数
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X1240V8I 技术参数

是否Rohs认证：	不符合	生命周期：	Transferred
包装说明：	PLASTIC, TSSOP-8	Reach Compliance Code：	unknown
风险等级：	5.8	Is Samacsys：	N
最大时钟频率：	0.032 MHz	信息访问方法：	I2C
中断能力：	N	JESD-30 代码：	R-PDSO-G8
JESD-609代码：	e0	长度：	4.4 mm
端子数量：	8	计时器数量：
最高工作温度：	85 °C	最低工作温度：	-40 °C
封装主体材料：	PLASTIC/EPOXY	封装代码：	TSSOP
封装等效代码：	TSSOP8,.25	封装形状：	RECTANGULAR
封装形式：	SMALL OUTLINE, THIN PROFILE, SHRINK PITCH	电源：	3 V
认证状态：	Not Qualified	座面最大高度：	1.2 mm
子类别：	Timer or RTC	最大供电电压：	3.6 V
最小供电电压：	2.7 V	标称供电电压：	3 V
表面贴装：	YES	技术：	CMOS
温度等级：	INDUSTRIAL	端子面层：	Tin/Lead (Sn/Pb)
端子形式：	GULL WING	端子节距：	0.65 mm
端子位置：	DUAL	最短时间：	SECONDS
易失性：	NO	宽度：	3 mm
uPs/uCs/外围集成电路类型：	TIMER, REAL TIME CLOCK	Base Number Matches：	1

X1240V8I 数据手册

X1240

the clock on the ACK bit prior to RTC data output) into

a separate latch to avoid time changes during the read

operation. The clock continues to run.

The CCR is divided into 3 sections. These are:

1. Control (2 bytes)

2. Real Time Clock (8 bytes)

3. Status (1 byte)

Writing to the Real Time Clock

The time and date may be set by writing to the RTC

registers. To avoid changing the current time by an

uncompleted write operation, the current time value is

loaded into a seperate buffer at the falling edge of the

clock on the ACK bit before the RTC data input bytes,

the clock continues to run. The new serial input data

replaces the values in the buffer. This new RTC value

is loaded back into the RTC Register by a stop bit at

the end of a valid write sequence. An invalid write

operation aborts the time update procedure and the

contents of the buffer are discarded. After a valid write

operation the RTC will reflect the newly loaded data

beginning with the first “one second” clock cycle after

the stop bit. The RTC continues to update the time

while an RTC register write is in progress and the RTC

continues to run during any nonvolatile write sequences.

A single byte may be written to the RTC without affect-

ing the other bytes.

Sections 1) and 2) are nonvolatile and Section 3) is

volatile. Each register is read and written through buff-

ers. The non-volatile portion (or the counter portion of

the RTC) is updated only if RWEL is set and only after

a valid write operation and stop bit. A sequential read or

page write operation provides access to the contents

of only one section of the CCR per operation. Access

to another section requires a new operation. Contin-

ued reads or writes, once reaching the end of a sec-

tion, will wrap around to the start of the section. A read

or page write can begin at any address in the CCR.

Section 3) is a volatile register. It is not necessary to set

the RWEL bit prior to writing the status register. Section 3)

supports a single byte read or write only. Continued reads

or writes from this section terminates the operation.

The state of the CCR can be read by performing a ran-

dom read at any address in the CCR at any time. This

returns the contents of that register location. Additional

registers are read by performing a sequential read.

The read instruction latches all Clock registers into a

buffer, so an update of the clock does not change the

time being read. A sequential read of the CCR will not

result in the output of data from the memory array. At

the end of a read, the master supplies a stop condition

to end the operation and free the bus. After a read of

the CCR, the address remains at the previous address

+1 so the user can execute a current address read of

the CCR and continue reading the next Register.

CLOCK/CONTROL REGISTERS (CCR)

The Control/Clock Registers are located in an area

logically separated from the array and are only acces-

sible following a slave byte of “1101111x” and reads or

writes to addresses [0000h:003Fh].

CCR access

The contents of the CCR can be modified by performing

a byte or a page write operation directly to any address in

the CCR. Prior to writing to the CCR (except the status

set using a two step process (See section “Writing to

the Clock/Control Registers.”)

1 234 5 6 7...19

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与X1240V8I相关器件

型号	品牌	描述	获取价格	数据表
X1241S8	RENESAS	0 TIMER(S), REAL TIME CLOCK, PDSO8, PLASTIC, SOIC-8	获取价格
X1241S8-2.7	RENESAS	0 TIMER(S), REAL TIME CLOCK, PDSO8, PLASTIC, SOIC-8	获取价格
X1241S8-2.7A	RENESAS	0 TIMER(S), REAL TIME CLOCK, PDSO8, PLASTIC, SOIC-8	获取价格
X1241S8-4.5A	RENESAS	0 TIMER(S), REAL TIME CLOCK, PDSO8, PLASTIC, SOIC-8	获取价格
X1241S8I	RENESAS	0 TIMER(S), REAL TIME CLOCK, PDSO8, PLASTIC, SOIC-8	获取价格
X1241S8I-2.7	RENESAS	0 TIMER(S), REAL TIME CLOCK, PDSO8, PLASTIC, SOIC-8	获取价格

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