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参数资料
| 型号： | DS1216D |
| 厂商： | DALLAS SEMICONDUCTOR |
| 元件分类： | Timer or RTC |
| 英文描述： | 0 TIMER(S), REAL TIME CLOCK, DMA32 |
| 封装： | 0.600 INCH, DIP-32 |
| 文件页数： | 6/13页 |
| 文件大小： | 123K |
| 代理商： | DS1216D |
DS1216
2 of 13
PIN DESCRIPTION FOR DS1216D AND DS1216H
All pins pass through except 22 and 32.
Pin 1
RST
-
RESET
Pin 13
DQ0 -
Data Input/Output
Pin 16
GND -
Ground
Pin 22
CE
-
Conditioned Chip Enable
Pin 24
OE
-
Output Enable
Pin 29
WE
-
Write Enable
Pin 32
VCC
-
Switched VCC for 32-pin RAM
( DS1216D only)
(Pin 30 Vcc
-
Switched Vcc for 28-Pin RAM)
DESCRIPTION
The DS1216 SmartWatch/RAM Sockets are 600-mil wide DIP sockets with a built–in CMOS watch
function, a nonvolatile RAM controller circuit, and an embedded lithium energy source. The sockets
provide a NV RAM solution for memory sized from 2k x8 to 512k x8 with package sizes from 26 pin to
32 pins. When a socket is mated with a CMOS SRAM, it provides a complete solution to problems
associated with memory volatility and uses a common energy source to maintain time and date. A key
feature of the SmartWatch is that the watch function remains transparent to the RAM. The SmartWatch
monitors VCC for an out–of–tolerance condition. When such a condition occurs, an internal lithium energy
source is automatically switched on and write protection is unconditionally enabled to prevent loss of
watch and RAM data.
Using the SmartWatch saves PC board space since the combination of SmartWatch and the mated RAM
take up no more area than the memory alone. The SmartWatch uses the Vcc, Data I/O 0, CE , OE , and
WE for RAM and watch control. All other pins are passed straight through to the socket receptacle.
The SmartWatch provides timekeeping information including hundredths of seconds, seconds, minutes,
hours, day, date, month, and year information. The date at the end of the month is automatically adjusted
for months with less than 31 days, including correction for leap years. The SmartWatch operates in either
24–hour or 12–hour format with an AM/PM indicator.
OPERATION
Communication with the SmartWatch is established by pattern recognition on a serial bit stream of 64 bits
which must be matched by executing 64 consecutive write cycles containing the proper data on DQ0. All
accesses which occur prior to recognition of the 64–bit pattern are directed to memory.
After recognition is established, the next 64 read or write cycles either extract or update data in the
SmartWatch, and memory access is inhibited.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
32
31
30 (Vcc D)
29
28
27
26
25
24
23
22
21
20
19
18
17
VCC
WE
OE
CE
GND
DQ0
RST
32-Pin Intelligent Socket
相关PDF资料 |
PDF描述 |
|---|---|
| DS1216B | 0 TIMER(S), REAL TIME CLOCK, DMA28 |
| DS1216H | 0 TIMER(S), REAL TIME CLOCK, DMA32 |
| DS1216C | 0 TIMER(S), REAL TIME CLOCK, DMA28 |
| DS1216E | 0 TIMER(S), REAL TIME CLOCK, DIP28 |
| DS1225Y-200 | 8K X 8 NON-VOLATILE SRAM MODULE, 200 ns, PDIP28 |
相关代理商/技术参数 |
参数描述 |
|---|---|
| DS1216E | 功能描述:存储器控制器 SmartWatch ROM RoHS:否 制造商:Maxim Integrated |
| DS1216F | 功能描述:IC SMART/ROM 3V 64/256/1M 32DIP RoHS:否 类别:集成电路 (IC) >> 存储器 - 控制器 系列:- 标准包装:45 系列:- 控制器类型:静态 RAM（SRAM） 电源电压:4.5 V ~ 5.5 V 工作温度:0°C ~ 70°C 封装/外壳:16-SOIC（0.295"，7.50mm 宽） 供应商设备封装:16-SOIC W 包装:管件 |
| DS1216F-3 | 功能描述:IC SMART/ROM 3V 64/256/1M 32DIP RoHS:否 类别:集成电路 (IC) >> 存储器 - 控制器 系列:- 标准包装:45 系列:- 控制器类型:静态 RAM（SRAM） 电源电压:4.5 V ~ 5.5 V 工作温度:0°C ~ 70°C 封装/外壳:16-SOIC（0.295"，7.50mm 宽） 供应商设备封装:16-SOIC W 包装:管件 |
| DS1216H | 功能描述:存储器控制器 SmartWatch RAM RoHS:否 制造商:Maxim Integrated |
| DS1216MP000 | 制造商:Thomas & Betts 功能描述:100A,PLG,2P3W,MG,216,208V |
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