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DS28DG02: 2Kb SPI EEPROM with PIO, RTC, Reset, Battery Monitor, and Watchdog
PIN DESCRIPTION
NAME
X1
X2
PIN
TSSOP28 TQFN36
1 33
2 34
FUNCTION
32.768kHz Crystal Connection 1 or 32.768kHz Input from TCXO
32.768kHz Crystal Connection 2
RSTZ
3
36
Open-Drain Output Pin (Active Low) for V CC power-fail reset,
watchdog alarm, and Manual Reset Input . See Multifunction
Control/Setup Register description for more information.
WDI
4
2
Watchdog Input Pin (Active High) . See Multifunction Control/Setup
Register description at address 134h for more information.
Open-Drain Output Pin (Active Low) for (user-choice) watchdog
WDOZ
5
3
alarm. See Multifunction Control/Setup Register description for more
information.
WPZ
PIO0
PIO4
PIO8
GND
PIO10
PIO6
PIO2
V CC
PIO3
PIO7
PIO11
PIO9
PIO5
PIO1
6
7
8
9
10, 19
11
12
13
14, 15
16
17
18
20
21
22
4
5
6
7
9, 19
10
11
12
13, 15
16
17
18
21
22
23
Hardware Write-Protect Input Pin (Active Low) . See the SPI Interface
description for more information.
PIO Line #0
PIO Line #4
PIO Line #8
Ground Supply
PIO Line #10
PIO Line #6
PIO Line #2
Power Supply Input
PIO Line #3
PIO Line #7
PIO Line #11
PIO Line #9
PIO Line #5
PIO Line #1
Open-Drain Output Pin (Active Low) for RTC, battery monitor, and
ALMZ
23
24
(user-choice) watchdog alarms. See the Multifunction Control/Setup
Register description for more information.
SO
SI
SCK
CSZ
V BAT
24
25
26
27
28
25
26
28
30
31
SPI Serial Data Output (tristate)
SPI Serial Data Input
SPI Serial Clock Input
Chip Select Input (Active Low)
Backup Battery Supply for RTC and RSTZ support.
1, 8, 14,
N.C.
—
20, 27,
No Connection
29, 32, 35
GND
EP
EP
Exposed Paddle. Solder evenly to the board’s ground plane for proper
operation. See Application Note 3273 for additional information.
OVERVIEW
The DS28DG02 features 2Kb of EEPROM, 12 bidirectional PIO channels, an RTC with calendar and alarm
function, a watchdog timer, two voltage monitors with precision trip points, and three alarm/reset outputs. Each
DS28DG02 has its own unique registration number, which serves as identification of the product the device is
embedded in. All these resources are accessed through a serial SPI interface, as shown in the block diagram in
Figure 1. The SPI interface automatically adjusts to SPI modes (0,0) and (1,1). The V CC trip point, which controls
the power-fail reset output (RSTZ pin), is set at the factory. The user can set the battery monitor threshold and the
watchdog time-out through software. The RTC uses the common BCD format for time, calendar and day of the
week. The device can be programmed to generate an RTC alarm every second, minute, hour, or day and once a
week or once a month at a user-defined time. RTC, watchdog, and battery alarm can be individually enabled.
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相关代理商/技术参数
DS28DG02EVKIT 功能描述:存储器 IC 开发工具 RoHS:否 制造商:STMicroelectronics 产品:Reference Boards 工具用于评估:M24LR64-R 存储容量:64 kbit 存储类型:EEPROM 工作电源电压:1.8 V to 5.5 V
DS28DG02G-3C+ 功能描述:电可擦除可编程只读存储器 2Kb SPI 电可擦除可编程只读存储器 w/PIO RTC/Rst/Bat Mtr/Wtdg RoHS:否 制造商:Atmel 存储容量:2 Kbit 组织:256 B x 8 数据保留:100 yr 最大时钟频率:1000 KHz 最大工作电流:6 uA 工作电源电压:1.7 V to 5.5 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:SOIC-8
DS28DG02G-3C+T 功能描述:电可擦除可编程只读存储器 2Kb SPI 电可擦除可编程只读存储器 w/PIO RTC/Rst/Bat Mtr/Wtdg RoHS:否 制造商:Atmel 存储容量:2 Kbit 组织:256 B x 8 数据保留:100 yr 最大时钟频率:1000 KHz 最大工作电流:6 uA 工作电源电压:1.7 V to 5.5 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:SOIC-8
DS28E01-100 制造商:MAXIM 制造商全称:Maxim Integrated Products 功能描述:带SHA-1引擎保护的1K位1-Wire EEPROM
DS28E01-100_12 制造商:MAXIM 制造商全称:Maxim Integrated Products 功能描述:1Kb Protected 1-Wire EEPROM with SHA-1 Engine
DS28E01-100+ 功能描述:电可擦除可编程只读存储器 RoHS:否 制造商:Atmel 存储容量:2 Kbit 组织:256 B x 8 数据保留:100 yr 最大时钟频率:1000 KHz 最大工作电流:6 uA 工作电源电压:1.7 V to 5.5 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:SOIC-8
DS28E01G-100+R 制造商:DALLAS 制造商全称:Dallas Semiconductor 功能描述:1K-Bit Protected 1-Wire EEPROM with SHA-1 Engine
DS28E01G-100+T 制造商:DALLAS 制造商全称:Dallas Semiconductor 功能描述:1K-Bit Protected 1-Wire EEPROM with SHA-1 Engine