參數(shù)資料
型號(hào)： BQ4802LYDWR
廠商： TEXAS INSTRUMENTS INC
元件分類： XO, clock
英文描述： 1 TIMER(S), REAL TIME CLOCK, PDSO28
封裝： GREEN, PLASTIC, SOIC-28
文件頁數(shù)： 21/24頁
文件大?。?/td> 481K
代理商： BQ4802LYDWR
bq4802Y
bq4802LY
SLUS464C – AUGUST 2000 – REVISED JUNE 2002
www.ti.com
6
Terminal Functions (Continued)
TERMINAL
I/O
DESCRIPTION
NAME
NO.
I/O
DESCRIPTION
WDI
23
I
WDIis a three-level input. If WDI remains either high or low for longer than the watchdog time-out period (1.5-s default),
WDO goes low. WDO remains low until the next transition at WDI. Leaving WDI unconnected disables the watchdog
function. WDI connects to an internal voltage divider between VOUT and VSS, which sets it to mid-supply when left
unconnected.
WDO
4
WDO goes low if WDI remains either high or low longer than the watchdog time-out period. WDO returns high on the
next transition at WDI. WDO remains high if WDI is unconnected.
WE
27
WE provides the write control for the RTC memory locations.
X1
2(1)
Crystal connection
X2
3(1)
y
FUNCTIONAL BLOCK DIAGRAM
Figure 3 is a block diagram of the bq4802Y/bq4802LY. The following sections describe the bq4802Y/bq4802LY
functional operation including clock interface, data-retention modes, power-on reset timing, watchdog timer
activation, and interrupt generation.
Figure 3. Block Diagram
Time-
Base
Oscillator
X1
X2
÷8
÷64
16:1 MUX
4
Control/Status
Registers
Clock/Calendar
Update
Interrupt
Generator
INT
Watchdog
Transition
Detector
WDO
Power-Fail
Control, Battery
Switchover and
Reset Circuits
VOUT
RST
CEOUT
VCC
BC
CEIN
WDI
Clock/Calendarand
Alarm Registers
User Buffer
(16 Bytes)
P Bus
Interface
CS
OE
WE
A0 – A3
DQ0 – DQ7
相關(guān)PDF資料
PDF描述
BU-61743F3-292Z 2 CHANNEL(S), 1M bps, MIL-STD-1553 CONTROLLER, CQFP72
BU-61743F3-362Y 2 CHANNEL(S), 1M bps, MIL-STD-1553 CONTROLLER, CQFP72
BU-61743F3-420Q 2 CHANNEL(S), 1M bps, MIL-STD-1553 CONTROLLER, CQFP72
BU-61743F3-450L 2 CHANNEL(S), 1M bps, MIL-STD-1553 CONTROLLER, CQFP72
BU-61743F3-472Z 2 CHANNEL(S), 1M bps, MIL-STD-1553 CONTROLLER, CQFP72
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
BQ4802LYDWRG4 功能描述:實(shí)時(shí)時(shí)鐘 Parallel RTC RoHS:否 制造商:Microchip Technology 功能:Clock, Calendar. Alarm RTC 總線接口:I2C 日期格式:DW:DM:M:Y 時(shí)間格式:HH:MM:SS RTC 存儲(chǔ)容量:64 B 電源電壓-最大:5.5 V 電源電壓-最小:1.8 V 最大工作溫度:+ 85 C 最小工作溫度: 安裝風(fēng)格:Through Hole 封裝 / 箱體:PDIP-8 封裝:Tube
BQ4802LYPW 功能描述:實(shí)時(shí)時(shí)鐘 Parallel RTC RoHS:否 制造商:Microchip Technology 功能:Clock, Calendar. Alarm RTC 總線接口:I2C 日期格式:DW:DM:M:Y 時(shí)間格式:HH:MM:SS RTC 存儲(chǔ)容量:64 B 電源電壓-最大:5.5 V 電源電壓-最小:1.8 V 最大工作溫度:+ 85 C 最小工作溫度: 安裝風(fēng)格:Through Hole 封裝 / 箱體:PDIP-8 封裝:Tube
BQ4802LYPWG4 功能描述:實(shí)時(shí)時(shí)鐘 Parallel RTC RoHS:否 制造商:Microchip Technology 功能:Clock, Calendar. Alarm RTC 總線接口:I2C 日期格式:DW:DM:M:Y 時(shí)間格式:HH:MM:SS RTC 存儲(chǔ)容量:64 B 電源電壓-最大:5.5 V 電源電壓-最小:1.8 V 最大工作溫度:+ 85 C 最小工作溫度: 安裝風(fēng)格:Through Hole 封裝 / 箱體:PDIP-8 封裝:Tube
BQ4802LYPWR 功能描述:實(shí)時(shí)時(shí)鐘 Parallel RTC RoHS:否 制造商:Microchip Technology 功能:Clock, Calendar. Alarm RTC 總線接口:I2C 日期格式:DW:DM:M:Y 時(shí)間格式:HH:MM:SS RTC 存儲(chǔ)容量:64 B 電源電壓-最大:5.5 V 電源電壓-最小:1.8 V 最大工作溫度:+ 85 C 最小工作溫度: 安裝風(fēng)格:Through Hole 封裝 / 箱體:PDIP-8 封裝:Tube
BQ4802LYPWRG4 功能描述:實(shí)時(shí)時(shí)鐘 Parallel RTC RoHS:否 制造商:Microchip Technology 功能:Clock, Calendar. Alarm RTC 總線接口:I2C 日期格式:DW:DM:M:Y 時(shí)間格式:HH:MM:SS RTC 存儲(chǔ)容量:64 B 電源電壓-最大:5.5 V 電源電壓-最小:1.8 V 最大工作溫度:+ 85 C 最小工作溫度: 安裝風(fēng)格:Through Hole 封裝 / 箱體:PDIP-8 封裝:Tube
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