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参数资料
| 型号： | DS12CR887 |
| 英文描述： | RTC with Constant-Voltage Trickle Charger |
| 中文描述： | 带有恒压涓流充电器的RTC |
| 文件页数： | 9/22页 |
| 文件大小： | 1093K |
| 代理商： | DS12CR887 |
D
RTC with Constant-Voltage Trickle Charger
_____________________________________________________________________
9
POWER
CONTROL
AND
TRICKLE
CHARGER
V
BACKUP
OSC
BUS
INTERFACE
V
CC
X1
X2
DS12R887/
DS12CR887
ONLY
DS12R887/
DS12CR887
ONLY
RESET
CS
DS
AS
R/W
MOT
AD0–AD7
DIVIDE
BY 8
DIVIDE
BY 64
DIVIDE
BY 64
16:1 MUX
SQUARE-
WAVE
GENERATOR
IRQ
GENERATOR
REGISTERS A, B, C, D
CLOCK/CALENDAR AND
ALARM REGISTERS
USER RAM
114 BYTES
CLOCK/CALENDAR
UPDATE LOGIC
IRQ
SQW
BUFFERED CLOCK/
CALENDAR AND ALARM
REGISTERS
GND
RLCR
DS12R885
Functional Diagram
Pin Description
PIN
EDIP
SO
BGA
NAME
FUNCTION
1
1
C5
MOT
Motorola or Intel Bus Timing Selector. This pin selects one of two bus types. When
connected to V
CC
, Motorola bus timing is selected. When connected to GND or left
disconnected, Intel bus timing is selected. The pin has an internal pulldown resistor.
2
—
—
X1
3
—
—
X2
Connections for Standard 32.768kHz Quartz Crystal. The internal oscillator circuitry is
designed for operation with a crystal having a 12.5pF specified load capacitance (C
L
). Pin
X1 is the input to the oscillator and can optionally be connected to an external 32.768kHz
oscillator. The output of the internal oscillator, pin X2, is floated if an external oscillator is
connected to pin X1.
4–11
4–11
F4, D4,
F3, D3,
F2, D2,
F1, D1
AD0–
AD7
Multiplexed, Bidirectional Address/Data Bus. The addresses are presented during the first
portion of the bus cycle and latched into the DS12R885 by the falling edge of AS. Write
data is latched by the falling edge of DS (Motorola timing) or the rising edge of R/
W
(Intel
timing). In a read cycle, the DS12R885 outputs data during the latter portion of DS (DS and
R/
W
high for Motorola timing, DS low and R/
W
high for Intel timing). The read cycle is
terminated and the bus returns to a high-impedance state as DS transitions low in the case
of Motorola timing or as DS transitions high in the case of Intel timing.
相关PDF资料 |
PDF描述 |
|---|---|
| DS12CR887-33 | RTC with Constant-Voltage Trickle Charger |
| DS12CR887-5 | RTC with Constant-Voltage Trickle Charger |
| DS12CR885 | RTC with Constant-Voltage Trickle Charger |
| DS12CR887 | RTC with Constant-Voltage Trickle Charger |
| DS12CR887-33 | RTC with Constant-Voltage Trickle Charger |
相关代理商/技术参数 |
参数描述 |
|---|---|
| DS12CR887-33 | 功能描述:实时时钟 RoHS:否 制造商:Microchip Technology 功能:Clock, Calendar. Alarm RTC 总线接口:I2C 日期格式:DW:DM:M:Y 时间格式:HH:MM:SS RTC 存储容量:64 B 电源电压-最大:5.5 V 电源电压-最小:1.8 V 最大工作温度:+ 85 C 最小工作温度: 安装风格:Through Hole 封装 / 箱体:PDIP-8 封装:Tube |
| DS12CR887-33+ | 功能描述:实时时钟 RTC w/Constant V Trickle Charger RoHS:否 制造商:Microchip Technology 功能:Clock, Calendar. Alarm RTC 总线接口:I2C 日期格式:DW:DM:M:Y 时间格式:HH:MM:SS RTC 存储容量:64 B 电源电压-最大:5.5 V 电源电压-最小:1.8 V 最大工作温度:+ 85 C 最小工作温度: 安装风格:Through Hole 封装 / 箱体:PDIP-8 封装:Tube |
| DS12CR887-5 | 功能描述:实时时钟 RoHS:否 制造商:Microchip Technology 功能:Clock, Calendar. Alarm RTC 总线接口:I2C 日期格式:DW:DM:M:Y 时间格式:HH:MM:SS RTC 存储容量:64 B 电源电压-最大:5.5 V 电源电压-最小:1.8 V 最大工作温度:+ 85 C 最小工作温度: 安装风格:Through Hole 封装 / 箱体:PDIP-8 封装:Tube |
| DS12CR887-5+ | 功能描述:实时时钟 RTC w/Constant V Trickle Charger RoHS:否 制造商:Microchip Technology 功能:Clock, Calendar. Alarm RTC 总线接口:I2C 日期格式:DW:DM:M:Y 时间格式:HH:MM:SS RTC 存储容量:64 B 电源电压-最大:5.5 V 电源电压-最小:1.8 V 最大工作温度:+ 85 C 最小工作温度: 安装风格:Through Hole 封装 / 箱体:PDIP-8 封装:Tube |
| DS12R885-33 | 制造商:Maxim Integrated Products 功能描述:REAL TIME CLOCK MULTIPLEXED 114BYTE - Bulk |
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