- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄385765 > R2023T (Ricoh Co., Ltd.) 2-wire Serial Interface Real Time Clock IC PDF資料下載
參數(shù)資料
| 型號(hào)： | R2023T |
| 廠商： | Ricoh Co., Ltd. |
| 英文描述： | 2-wire Serial Interface Real Time Clock IC |
| 中文描述： | 2線串行接口實(shí)時(shí)時(shí)鐘芯片 |
| 文件頁數(shù)： | 36/50頁 |
| 文件大?。?/td> | 512K |
| 代理商： | R2023T |
第1頁第2頁第3頁第4頁第5頁第6頁第7頁第8頁第9頁第10頁第11頁第12頁第13頁第14頁第15頁第16頁第17頁第18頁第19頁第20頁第21頁第22頁第23頁第24頁第25頁第26頁第27頁第28頁第29頁第30頁第31頁第32頁第33頁第34頁第35頁當(dāng)前第36頁第37頁第38頁第39頁第40頁第41頁第42頁第43頁第44頁第45頁第46頁第47頁第48頁第49頁第50頁
R2023K/T
Power-on Reset, Oscillation Halt Sensing, and Supply Voltage
Monitoring
PON,
XST
, and VDET
36
The power-on reset circuit is configured to reset control register1, 2, and clock adjustment register when VDD
power up from 0v. The oscillation halt sensing circuit is configured to record a halt on oscillation by 32.768-kHz
clock pulses. The supply voltage monitoring circuit is configured to record a drop in supply voltage below a
threshold voltage of 1.6 or 1.3V.
Each function has a monitor bit. I.e. the PON bit is for the power-on reset circuit, and
XST
bit is for the
oscillation halt sensing circuit, and VDET is for the supply voltage monitoring circuit. PON and VDET bits are
activated to “H”. However,
XST
bit is activated to “L”. The PON and VDET accept only the writing of 0, but
XST
accepts the writing of 0 and 1. The PON bit is set to 1, when VDD power-up from 0V, but VDET is set to 0,
and
XST
is indefinite.
The functions of these three monitor bits are shown in the table below.
PON
Function
Monitoring for the
power-on reset function
oscillation halt sensing
function
Address
D4 in Address Fh
D5 in Address Fh
Activated
High
Low
When VDD
power up from 0v
accept the writing
0 only
Both 0 and 1
The relationship between the PON,
XST
, and VDET is shown in the table below.
PON
XST
VDET
Conditions of supply voltage and
oscillation
0
0
0
Halt on oscillation, but no drop in
VDD supply voltage below threshold
voltage
0
0
1
Halt on oscillation and drop in VDD
supply voltage below threshold
voltage, but no drop to 0V
0
1
0
No drop in VDD supply voltage
below threshold voltage and no halt
in oscillation
0
1
1
Drop in VDD supply voltage below
threshold voltage and no halt on
oscillation
1
*
*
Drop in supply voltage to 0v
XST
VDET
Monitoring for the
a drop in supply voltage
below a threshold
voltage of 1.6 or 1.3V
D6 in Address Fh
High
0
1
Indefinite
0 only
Condition of oscillator, and
back-up status
Halt on oscillation cause of
condensation etc.
Halt on oscillation cause of drop in
back-up battery voltage
Normal condition
No halt on oscillation, but drop in
back-up battery voltage
Power-up from 0v,
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| R2023T-E2 | 2-wire Serial Interface Real Time Clock IC |
| R2025D | High precision I2C-Bus Real-Time Clock Module |
| R2025S | High precision I2C-Bus Real-Time Clock Module |
| R5326Z003B | Automatic Mode Shift 2ch 150mA LDO |
| R5326Z004A | Automatic Mode Shift 2ch 150mA LDO |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| R2023T-E2 | 制造商:RICOH 制造商全稱:RICOH electronics devices division 功能描述:2-wire Serial Interface Real Time Clock IC |
| R2-0257-02 | 制造商:Southco 功能描述: |
| R2-0259-02 | 制造商:Southco 功能描述: |
| R2025D | 制造商:RICOH 制造商全稱:RICOH electronics devices division 功能描述:High precision I2C-Bus Real-Time Clock Module |
| R2025S | 制造商:RICOH 制造商全稱:RICOH electronics devices division 功能描述:High precision I2C-Bus Real-Time Clock Module |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。