User's Manual
Table Of Contents
- 1. Introduction
- 2. Mod. A528 Technical Specifications
- 2.1. Mod. A528 Technical Specifications Table
- 2.2. External connections
- 2.2.1. A528 Main connector pinout
- 2.2.2. A528 MAIN connector electrical characteristics
- 2.2.3. Power supply connection
- 2.2.4. General purpose I/O connections
- 2.2.5. External reset
- 2.2.6. UART connection
- 2.2.7. A528 recovery
- 2.2.8. A528 USB connector pinout
- 2.2.9. USB connector pinout electrical characteristics
- 2.2.10. Antenna port specifications
- 2.3. Reader – Tag link profiles
- 2.4. Host communication interfaces
- 2.5. A528 Firmware Upgrade
Document type: Title: Revision date: Revision:
User's Manual (MUT) Mod. A528 OEM UHF Multiregional compact reader 02/04/2008 2
2.2.6. UART connection
The RXD/TXD pins are used to communicate with the A528 board via UART port. Since
A528 RX/TX are TTL level signals, in order to connect it with a PC, a TTL/RS232
translator shall be used (please refer to the diagram below)
4.
To establish a link with the device host COM port shall be configured as follows:
1. Baud rate: 115200
2. Parity: None
3. Data bits: 8
4. Stop bits: 1
5. Flow Control: none
Fig. 2-5: Mod. A528 RS232 connection
2.2.7. A528 recovery
TST_RECOVERY pin is reserved and shall be used only to perform the microcontroller
recovery procedure during which it must be forced at high level (3.3V or 5V).
In the following diagram a manual recovery mechanism is shown: in order to perform the
A528 boot recovery the jumper JP1 shall be inserted, then A528 shall be switched on by
applying 5V supply voltage for 5s at least. After that the reader shall be switched off and
the jumper removed: at the next switch on the reader will execute the boot recovery
program.
For further details please see § 2.5.
4
A528 service board (A528ADAT) hosts both RS232 and USB full interfaces.
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