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参数资料
| 型号： | RTC6581 |
| 元件分类： | 时钟/数据恢复及定时提取 |
| 英文描述： | REAL TIME CLOCK, PDIP24 |
| 封装： | DIP-24 |
| 文件页数： | 10/35页 |
| 文件大小： | 591K |
| 代理商： | RTC6581 |
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EPSON
EPSON ELECTRONICS AMERICA, INC.
RTC-658X/RTC-659X
n Functions
1. Power - Down/Power - Up Considerations
When a suitable back-up voltage is supplied to the VBAT pin, the Real Time Clock module will continue to operate and all of
the RAM, time, calendar, alarm, and extended alarm memory locations will remain non-volatile regardless of the voltage
level of VDD. When the voltage level applied to the VDD input is greater than VENABLE, the module becomes accessible
within 200 ms provided that the oscillator and countdown chain have been programmed to be running. This time period
allows the module to stabilize after power is applied. When VDD falls below VENABLE, the chip select inputs, RTC (CS) or
XALM, are forced to an inactive state regardless of the state of the pin signals. This puts the module into a write-protected
mode in which all inputs are ignored and alt outputs are in a high impedance state. Furthermore, when VDD falls below
VSWITCH, the module is switched over to a battery power source or VBAT so that power is not interrupted to time keeping
and non-volatile RAM functions.
2. Address Map
The registers of the device appear in two distinct address ranges. One set of registers is active when RTC (CS) is
asserted low and represents the real time clock. The second set of registers is active when XALM is asserted low and
represents the extended alarm. (RTC-6591/6593/6597 only)
(1) RTC Address Map: The address map of the RTC module is shown in the following.
The address consists of 114 bytes of general purpose RAM, 10 bytes of RTC/calendar information, and 4 bytes of
status and control information.
Registers C and D are Read Only (Status information)
- Bit 7 of Register A is Read Only
Bit 7 of the "Seconds" byte (00) is Read Only
(2) Extended alarm Address Map: (RTC-6591/6593/6597 only)
The address map of the extended alarm is shown in the following. The address consists of six bytes of full alarm
information and two bytes of control and status information.
Address Map Real-time-clock
0
1
2
00
13
14 bytes
00H
0DH
3
4
5
6
7
8
9
Seconds
Seconds Alarm
Minutes
Minutes Alarm
Hours
Hours Alarm
Day of the Week
Day of the Month
Month
Year
10
11
12
13
Register A
Register B
Register C
Register D
14
127
114 bytes
0EH
7FH
127
General Purpose Ram
Address Map Extended Alarm (RTC-6591/6593/6597 only)
0
1
2
3
4
5
Extended Seconds Alarm
Extended Minute Alarm
Extended Hours Alarm
Extended Day of the Week Alarm
Extended Day of the Month Alarm
Extended Month Alarm
00
07
8 bytes
00H
07H
6
7
Register 6
Register 7
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相关代理商/技术参数 |
参数描述 |
|---|---|
| RTC-6583 | 制造商:未知厂家 制造商全称:未知厂家 功能描述:Real-Time Clock |
| RTC-6587 | 制造商:未知厂家 制造商全称:未知厂家 功能描述:Real-Time Clock |
| RTC-6593 | 制造商:EPSON 制造商全称:EPSON 功能描述:REAL TIME CLOCK MODULE FOR PC/AT |
| RTC-6597 | 制造商:未知厂家 制造商全称:未知厂家 功能描述:Real-Time Clock |
| RTC6601 | 制造商:Richwave 功能描述:SP3T SWITCH, DFN 2x2-8L |
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