RAK15004 WisBlock FRAM Module Datasheet
Overview
Figure 1: RAK15004 WisBlock FRAM ModuleDescription
RAK15004 is a WisBlock FRAM Storage Module based on MB85RC512T 512 kbit (64k x 8) from FUJITSU. It is a very high endurance nonvolatile memory storage chip that provides a write/read count of 10,000,000,000,000 per byte. It can be interfaced via I2C and support High-Speed Mode at 3.4 MHz.
Features
-
Sensor specifications
- Chipset: FUJITSU MB85RC512T
- Voltage supply: 3.3 V
- Operating current: 15 μA ~ 0.71 mA
- 65536 words × 8 bits
- High Reliability:
- Read/write endurance: 10,000,000,000,000 / byte
- Data retention: 10 years (+ 85° C) & 95 years (+ 55° C)
- I2C digital interface and supports High Speed Mode at 3.4 Mhz
- Operating temperature: -40° C ~ 85° C
-
Module size
- 10 x 10 mm
Specifications
Overview
Mounting
Figure 1 shows the mounting mechanism of the RAK15004 module on a WisBlock Base board. The RAK15004 module can be mounted on slots: A, C, D, E, and F.
Figure 1: RAK15004 WisBlock FRAM module mountingHardware
The hardware specification is categorized into five parts. It shows the chipset of the module and discusses the pinouts, and their corresponding functions and diagrams. It also covers the electrical and mechanical parameters, including the tabular data of the functionalities and standard values of the RAK15004 WisBlock FRAM Module.
Chipset
| Vendor | Part Number |
|---|---|
| FUJITSU | MB85RC512T |
Figure 2 shows MB85RC512T the device addressing, which A1 and A2 were pulled up to high level. The device address is 1010110 (0x56).
Figure 1: MB85RC512T device addressingPin Definition
The RAK15004 WisBlock FRAM Module comprises a standard WisBlock connector. The WisBlock connector allows the RAK15004 module to be mounted to a WisBlock Base board. The pin order of the connector and the pinout definition is shown in Figure 3.
Figure 1: RAK15004 pinout diagram- Only I2C related pin, 3V3_S, and GND are connected to WisBlock connector.
- 3V3_S voltage output from the WisBlock Base that powers the RAK15004 module can be controlled by the WisBlock Core via
WB_IO2 (WisBlock IO2 pin). This makes the module ideal for low-power IoT projects since the WisBlock Core can be disconnected from the RAK15004 module power.
Electrical Characteristics
| Symbol | Description | Min. | Nom. | Max. | Unit |
|---|---|---|---|---|---|
| VDD | Power Supply Voltage | - | 3.3 | - | V |
| Istb | Standby Current | - | - | 15 | uA |
| Icc | Supply Current (Read & Write) | - | - | 710 | uA |
Mechanical Characteristics
Board Dimensions
Figure 4 shows the dimensions and the mechanic drawing of the RAK15004 module.
Figure 1: RAK15004 mechanical dimensionsWisBlock Connector PCB Layout
Figure 1: WisBlock Connector PCB footprint and recommendationsSchematic Diagram
Figure 6 shows the schematic of the RAK15004 FRAM module. The default I2C address of the FRAM module is 0x56.
Figure 1: RAK15004 schematic diagram
