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AT86RF230 Datasheet(PDF) 7 Page - ATMEL Corporation |
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AT86RF230 Datasheet(HTML) 7 Page - ATMEL Corporation |
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7 / 98 page  7 5131D-ZIGB-12/03/07 AT86RF230 4.3.2 Pull-up and Pull-down Configuration of Digital Input Pins Pulling resistors are internally connected to all digital input pins in radio transceiver state P_ON (see section 7.1.2). Table 4-4 summarizes the pull-up and pull-down configuration. Table 4-4 Pull-Up/Pull-Down Configuration of Digital Input Pins in P_ON State Pin H ≙ ≙ ≙ ≙ pull-up, L ≙ ≙ ≙ ≙ pull-down RST H SEL H SCLK L MOSI L SLP_TR L In all other radio transceiver states, no pull-up or pull-down resistors are connected to any of the digital input pins. 4.3.3 Register Description Register 0x03 (TRX_CTRL_0) The TRX_CTRL_0 register controls the drive current of the digital output pads and the CLKM clock rate. Bit 7 6 5 4 0x03 PAD_IO PAD_IO_CLKM TRX_CTRL_0 Read/Write R/W R/W R/W R/W Reset value 0 0 0 1 Bit 3 2 1 0 0x03 CLKM_SHA_SEL CLKM_CTRL TRX_CTRL_0 Read/Write R/W R/W R/W R/W Reset value 1 0 0 1 • Bit [7:6] – PAD_IO The register bits PAD_IO set the output driver current of digital output pads MISO and IRQ. Table 4-5. Digital Output Driver Strength Register Bit Value Description 0 (1) 2 mA 1 4 mA 2 6 mA PAD_IO 3 8 mA Notes: 1. Reset values of register bits are underlined characterized in the document. • Bit [5:6] – PAD_IO_CLKM The register bits PAD_IO_CLKM set the output driver current of pin CLKM. |
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