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HT82K75REW Datasheet(PDF) 60 Page - Holtek Semiconductor Inc |
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HT82K75REW Datasheet(HTML) 60 Page - Holtek Semiconductor Inc |
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60 / 103 page  HT82M75REW/HT82K75REW Rev. 1.00 60 June 11, 2010 RF Transceiver Interrupt Configuration The RF Transceiver issues a hardware interrupt at the internally connected interrupt signal line named INT to the MCU host. There are two related registers that need to be set correctly. All the interrupts are masked (disabled) by default. The interrupt mask should be removed by setting SREG0x32 in advance. The interrupt is by default sent to the MCU host as a falling edge signal after mask removed. The polarity can be configured by LREG0x211. The interrupt status can be read from SREG0x31 when it is triggered. Registers associated with Interrupt Configuration Addr. File Name Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0 Value on POR 0x31 ISRSTS r WAKEIF r r RXIF r r TXNIF 0000 0000 0x32 INTMSK r WAKEMSK r r RXMSK r r TXNMSK 1111 1111 0x211 IRQCTRL r r r r r r IRQPOL r 0000 0000 RF Transceiver External Power Amplifier Configuration To enable the Power Amplifier (P.A.), users can set LREG0x22F [2:0] value to 0x001B. This register setting integrates the P.A. enable and the RF Switch Control (TX branch, RX branch) by utilizing GPIO0, GPIO1 and GPIO2. If the RF Transceiver is in TX mode, the GPIO0 (external P.A. enable) and GPIO1 (TX branch enable) will be pulled HIGH, and GPIO2 (RX branch enable) will be pulled LOW. If the RF Transceiver is in RX mode, the GPIO0 and GPIO1 will be pulled LOW, and GPIO2 will be pulled HIGH. The status of GPIO pins are automatically changed corresponding to TX/RX mode of the RF Transceiver. · TX mode: [GPIO0, GPIO1, GPIO2] = [HIGH, HIGH, LOW] · RX mode: [GPIO0, GPIO1, GPIO2] = [LOW, HIGH, HIGH] Registers associated with External Power Amplifier Configuration Addr. File Name Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0 Value on POR 0x22F TESTMODE MSPI r r r r TESTMODE2 TESTMODE1 TESTMODE0 0010 1000 RF Transceiver Turbo Mode Configuration The RF Transceiver provides 1M bps Turbo mode to transmit and receive data at a higher data rate. Turbo mode pro- vides an added capability for applications which require more bandwidth. The application circuits need not any modifi- cation for Turbo mode. To use the RF Transceiver in 250k and 1M bps, the following registers need to be configured as below. Address Mode Addr. Register Name Descriptions Value (hex) 250k 1M LREG 0x206 RFCTL6 RF optimized control 0x00 0xC0 LREG 0x207 RFCTL7 RF optimized control 0xE0 0xF0 SREG 0x38 BBREG0 Enable Normal/Turbo mode 0x80 0x81 SREG 0x2A SOFTRST Baseband Reset 0x02 Registers associated with External Power Amplifier Configuration Addr. File Name Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0 Value on POR 0x2A SOFTRST r r r r r r RSTBB RSTMAC 0000 0000 0x38 BBREG0 r r r r r r r TURBO 1000 0001 0x206 RFCTRL6 TXFBW1 TXFBW0 32MXCO1 32MXCO0 BATEN r r r 1111 0000 0x207 RFCTRL7 r r r RXFC2 r r r r 0000 0000 |
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