Specification of RTRM08 Transceiver Module Easywave I2C - ELDAT

More documents

Recommendations

Info

Specification Index 1.01 Project No. RF-Products, Controller RTRM08 Transceiver Module Easw I 2 C Page 22 Development Production S. Schreiber 2007-08-24 The master can abort the procedure before an Easywave telegram is learned by setting the RX_MODE register to any value unequal to the LN_RQ or LN_PL value. Delete Learned Easywave Telegrams The RX_MODE register must be set to the DELLN value. The / REQ output is always inactive (high). When the DELLN value is written into RX_MODE register, the transceiver module immediately deletes the learned Easywave telegram of the channel which is specified by the RX_CHANNEL register. The transceiver module clears the appropriate bit in the bit mask of the RX_LN_CH0_7, RX_LN_CH8_15, RX_LN_CH16_23, and RX_LN_CH24_31 registers to indicate that the channel is no longer used. If the channel was not used before, the entire procedure described in this paragraph has not any effect. A master should perfom the following steps if it wants to delete a learned Easywave telegram: • Set the RX_MODE register to the PWD or PWD_RST value. This prevents the transceiver module from modifying the RX_CHANNEL register. • Set the RX_CHANNEL register appropriately. The master can determine an used channel by reading the bit mask from the RX_LN_CH0_7, RX_LN_CH8_15, RX_LN_CH16_23, and RX_LN_CH24_31 registers. • Set the RX_MODE register to the DELLN value. Transmitting of Easywave Telegrams The transceiver module has 32 built-in Easywave telegrams which it can transmit. A write access to the TX_ACK register initiates transmitting of an Easywave telegram with the channel of the TX_CHANNEL register and the button number of the TX_BUTTON register. The TX_ACK register also can be written in a single write transfer with the other mentioned registers. The transceiver module does the following: • The transceiver module switches its transceiver on and transmits a fixed count of Easywave telegrams regardless of the content of the RX_MODE register. The / REQ output and the status bits in the RX_STATUS register remain on their state. As long as the transceiver transmits, the TX_TRANSMIT-bit in the TX_STATUS register is 1. While the transceiver transmits, further writes into the TX_ACK register have not any effect. The master has to check the TX_TRANSMIT-bit in the TX_STATUS register whether it can initiate a desired transmission of a further Easywave telegram. • When the transceiver has finished transmitting of telegrams, it switches its transceiver on (receive) or off according to the RX_MODE register and continues operation as specified by the RX_MODE register. The TX_TRANSMIT-bit in the TX_STATUS register is 0 now. The yellow LED lights as long as the transceiver transmits. (The LED is drawn on Figure 1 on page 4). 7007
Specification Index 1.01 Project No. RF-Products, Controller RTRM08 Transceiver Module Easw I 2 C Page 23 Development Production S. Schreiber 2007-08-24 I 2 C-bus TX_TRANSMIT 1 0 transceiver write data: telegr. #1 transmit telegrams #1 Figure 12 Sequence when transmitting Easywave telegrams write data: telegr. #2 transmit telegrams #2 A master should perfom the following steps if it wants to transmit Easywave telegrams: • Check the TX_TRANSMIT-bit in the TX_STATUS register and wait until it is cleared. • Write the desired channel number and button number into the TX_CHANNEL and TX_BUTTON registers. • Write any value into the TX_ACK register. • Start with the first step for the next Easywave telegram. 3 Electrical Characteristics 3.1 Absolute Maximum Ratings 7007 Absolute Maximum Ratings Min Max Units Voltage V CC on VCC pin with respect to GND -0.3 5.8 V Voltage on any pin with respect to GND -0.3 V CC + 0.3 V Input clamp current and output clamp current - +/-20 mA Maximum output current by any output - +/-25 mA Ambient temperature under bias -40 85 °C Storage temperature -40 125 °C 3.2 Operating Conditions Operating Conditions Min Max Units Conditions Supply voltage V CC 2.1 5.25 V
Page 1 and 2: Specification Index 1.01 Project No
Page 21: Specification Index 1.01 Project No

Specification of RTRM08 Transceiver Module Easywave I2C - ELDAT

You also want an ePaper? Increase the reach of your titles

Delete template?

Save as template?