![[PukiWiki]](image/bc_logo.png "[PukiWiki]"){kind=logo}
This is a manual for BC-ANT-SERIAL. BC-ANT-SERIAL is a ANT-Serial bridge module. This document mainly describes the hardware specifications of BC-ANT-SERIAL.
BC-ANT-SERIAL (hereafter “module”) is a bridge module between ANT and Serial communications. This module is capable of handling ANT wireless sensor network protocol running on 2.4 GHz ISM band. To use the module, a data communication network is easily built on 2.4GHz ISM band.
This module has been passed the radio equipment classification and technical standards tests, it has received a radio equipment conformity certification from the Japanese authority. Each device has own certification number label on the back side of the module. If the certification number label is modified, removed, and replaced, the certification will be void. After the certification is received, the modifications of the antenna, high-frequency circuit and other hardware are considered as illegal, and the status of radio equipment conformity certification will be revoked.
Using TTL (1.9 ~ 3.6V single-end) level RS-232C interface, this module can be connected to microcomputers for embedded systems and PCs. (this assumes that both embedded systems and PCs are capable of handling RS-232C interface.)
Connecting a TTL (single-end) microcomputer, a cable is connected to J2 terminal (20-pin). For the pin assignments of this terminal, please look at a table below.
| Minimum | Standard | Maximum | Unit | |
| Supply voltage(VDD) | 1.9 | 3.0 | 3.6 | V |
| H level input voltage | 0.7 x VDD | VDD | V | |
| L level input voltage | VSS(GND) | 0.3 x VDD | V | |
| H level output voltage | VDD - 0.3 | VDD | V | |
| L level output voltage | VSS(GND) | 0.3 | V |
J2 pin-assign table
No Signal Name No Signal Name 1 RESET 2 GND 3 BR2 4 GND 5 SLEEP 6 GND 7 BR1 8 GND 9 BR3 10 GND 11 SUSPEND 12 GND 13 RXD 14 NC 15 TXD 16 NC 17 RTS 18 NC 19 VDD 20 GND
Serial connection communicate by 8bit length, no parity, 1bit stop-bit-length, and hardware flow. Its communication speed are determined by the configurations BR1, BR2, and BR3 pins. The table below shows the relationships between various pin configurations and communication speeds.
BR3 BR2 BR1 Speed 0 0 0 4800 0 1 0 19200 0 0 1 38400 0 1 1 50000 1 0 0 1200 1 1 0 2400 1 0 1 9600 1 1 1 57600
Caution) At 57600bps, the internal chip cannot catch up the communication speed, cannot process, and may fail to execute some commands. 19200bps or lower communication speeds are highly recommended.
This is an example of DIY communication cable
To use RS-232C interface, 1608 size jumper resistors are required at patterns of R18, R19, and R20. The locations of these patterns are shown below.
Please configure the pins at J2 terminal as shown in the table below.
Table of Pin Assignment at J2
No Signal Name Jumper Resistor 1-2 RESET Not Required 3-4 BR2 (See the table below) 5-6 SLEEP Required 7-8 BR1 (See the table below) 9-10 BR3 (See the table below) 11-12 SUSPEND Not Required 13-14 RXD Not Required 15-16 TXD Not Required 17-18 RTS Not Required 19-20 VDD 19: 3.3V, 20:GND
Number 19 pin and Number 20 pin are connected to the external power supply. The range of voltage at the external power supply is between 3.0 and 3.3V. Number 19 pin is for the positive pole, and Number 20 pin is connected to the negative pole.
Serial connection communicate by 8bit length, no parity, 1bit stop-bit-length, and hardware flow. Its communication speed is configured by the combinations of BR1, BR2, and BR3 pins at jumper. The combinations of pins are shown below.
BR3(9-10) BR2(3-4) BR1(7-8) Speed Yes Yes Yes 4800 Yes No Yes 19200 Yes Yes No 38400 Yes No No 50000 No Yes Yes 1200 No No Yes 2400 No Yes No 9600 No No No 57600 Caution) At 57600bps, the internal chip cannot catch up the communication speed, cannot process, and may fail to execute some commands. 19200bps or lower communication speeds are highly recommended.
RS-232C terminal (9-pin), which is widely used with PCs, should be connected by a commonly available cable (straight type) at electric stores.
- This module has already received a radio equipment conformity certification from the Japanese authority.
- The modifications of this module are not permitted. If it has done, its certification is void, and the use of this module in the public is regarded as illegal. This module gets warmer more than adequate, or it does not operate correctly, please turn off the module.
- Schematic
BC-ANT-SERIAL_sch.pdf
- Parts Placement
- Parts List
