Access Control
详情介绍
Overview
Access control systems control the access of authorized personnel into buildings and rooms. Access control systems are widely used to protect and prevent leaking of private and business information and strengthen security.
Access control comes in the form of physical security and security of communication systems such as a network. Here, we deal with physical security.
Systems that refuse access to unauthorized personnel may use PIN codes, magnetic strip cards, smart cards, fingerprints, and so on to verify the identity of a person before performing an action such as opening a door. In addition to access control, the system also possesses an interface for interacting with various access media in order to verify identity, and a screen for displaying the results.
Access control systems require an interface for various access media, an LCD controller, other necessary functions such as high current output, LAN or USB functions for interacting with external sources.
Renesas offers the SH7720 with LCD controller for display control, comprehensive peripheral functions in the form of USB function and USB host, and a built-in multimedia card interface and infrared communication module, which is ideally suited for these applications.
System Block Diagram
Recommended Products
| Block | Semiconductor device | Recommended products | Features, etc. |
|---|---|---|---|
| Main controller | MCU | SH7720 Series | SH7720 is a 32-bit RISC (reduced instruction set computer) microcontroller. It is equipped with a built-in LCD controller for display control, USB function, USB host, multimedia care interface, infrared communication module, and so on. |
| RL78/I1A Series | RL78 CPU core achieves both high computational performance and ultra low power consumption | ||
| RX210 Group | 20 MHz operation at 1.6 V, and 50 MHz operation at 5.5 V, voltage detection |
||
| 78K0/Lx3 | 8-bit All Flash MCU microcontroller: wealth of on-chip peripheral functions such as a segment LCD, reset circuit, and oscillator; low power consumption; 48 to 100 pins | ||
| R8C/Lx Series | 5 MHz operation at 1.8 V power supply voltage, 20 MHz operation at 2.7 V or more, built-in power-off mode great for low power consumption | ||
| V850ES/Jx3 | 32-bit All Flash microcontroller: wealth of on-chip peripheral functions; 100 to 144 pins | ||
| MCU peripheral | Photocoupler (standard) | PS23xx Series PS27xx Series PS28xx Series |
High isolation voltage (5kVr.m.s.), 4p-LSOP, Ta=115°C High isolation voltage (3.75kVr.m.s.), 4p-SOP, Ta=110°C High isolation voltage (2.5kVr.m.s.), 4p-SSOP, Ta=110°C |