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<strong>NFC</strong>-B TechnologyTable 28: Bit Rates Supported by the <strong>NFC</strong> Forum Device in Listen Modeb8 b7 b6 b5 b4 b3 b2 b1 MeaningxIf b8 = 1b, then only the same bit rate divisor forboth directions is supported(D LISTEN→POLL =D POLL→LISTEN ).If b8 = 0b, then a different bit rate divisor for eachdirection is supported.x D LISTEN→POLL = 8 supported, if bit is set to 1b.x D LISTEN→POLL =4 supported, if bit is set to 1b.x D LISTEN→POLL =2 supported, if bit is set to 1b.0 RFUx D POLL→LISTEN =8 supported, if bit is set to 1b.x D POLL→LISTEN =4 supported, if bit is set to 1b.x D POLL→LISTEN =2 supported, if bit is set to 1b.0 0 0 0 0 0 0 0 The <strong>NFC</strong> Forum Device supports only a bit rateof 106 kbits/s in both directions.Requirements 51: Bit Rates Supported by the <strong>NFC</strong> Forum Device in Listen ModePoll Mode5.6.2.3 The <strong>NFC</strong> Forum Device MUSTsupport a bit rate of 106 kbits/sin both directions.The <strong>NFC</strong> Forum Device MAY supporthigher bit rates.Listen Mode5.6.2.4 In response to a SENSB_REQand ALLB_REQ with b6 ofPARAM byte set to 0b, the <strong>NFC</strong>Forum Device MUST set bits b7to b5 and b3 to b1 of theBit_Rate_Capability equal to 0b,indicating that it supports only abit rate of 106 kbits/s in bothdirections.The <strong>NFC</strong> Forum Device MAY indicatesupport for higher bit rates in response to aSENSB_REQ and ALLB_REQ with b6 ofPARAM set to 1b.Requirements 52: Poll Mode Handling of RFU Value of b4 of Bit_Rate_CapabilityListen Mode5.6.2.5 A received RFU value of b4 = 1b MUST be interpreted by the <strong>NFC</strong> ForumDevice in Poll Mode as if b7 to b1 = 0000000b (only 106 kbits/s in bothdirections).NOTEHigher bit rates will be specified in next versions of this specification.<strong>NFC</strong> <strong>Digital</strong> <strong>Protocol</strong> Page 57
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