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PCD5008 Datasheet(PDF) 41 Page - NXP Semiconductors |
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PCD5008 Datasheet(HTML) 41 Page - NXP Semiconductors |
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41 / 64 page  1998 Jun 17 41 Philips Semiconductors Product specification FLEX ™ Pager Decoder PCD5008 K: 10-bit fragment checksum (Tables 44 and 45). See Section 8.8.6 for a description of message checksum. C: 1-bit message continued flag (Tables 44 and 45). When this bit is set, fragments of this message are to be expected in following frames. See Section 8.8.5 for a description of message fragmentation. F: 2-bit message fragment number (Tables 44 and 45). This is a modulo 3 message fragment number which is incremented by 1 in successive message fragments. See Section 8.8.5 for a description of message fragmentation. N: message number (Tables 44 and 45). See Section 8.8.7 for a description of message numbering. M: 1-bit mail drop flag (Table 44). When this bit is set, it indicates the message is to be stored in a special area in memory and is written over existing data automatically in that memory space. R: message retrieval flag (Table 44). When this bit is set, the pager expects this message to be numbered. See Section 8.8.7 for a description of message numbering. S: 7-bit signature field (Table 44). The signature is defined to be the 1’s complement of the binary sum over the total message (all fragments). 7 bits at a time are taken (on alpha character boundary) starting with the first 7 bits directly following the signature field, a6a5a4a3a2a1a0, b6b5b4b3b2b1b0, etc. The 7 LSBs of the result are transmitted as the message signature. U, V: fragmentation control bits (Table 45). This field exists in all fragments except the first fragment. It is used to support character position tracking in each fragment when symbolic characters (character made up of 1, 2 or 3 ASCII characters) are transmitted using the alphanumeric message type. The default value is 0,0. See Section 8.8.5.1 for a description of fragment control. Table 44 Vector type V = 101 first fragment Table 45 Vector type V = 101 other fragments MESSAGE WORD i0 i1 i2 i3 i4 i5 i6 i7 i8 i9 i10 i11 i12 i13 i14 i15 i16 i17 i18 i19 i20 1st K0 K1 K2 K3 K4 K5 K6 K7 K8 K9 C0 F0 F1 N0 N1 N2 N3 N4 N5 R0 M0 2nd S0 S1 S2 S3 S4 S5 S6 a0 a1 a2 a3 a4 a5 a6 b0 b1 b2 b3 b4 b5 b6 3rd c0 c1 c2 c3 c4 c5 c6 d0 d1 d2 d3 d4 d5 d6 e0 e1 e2 e3 e4 e5 e6 4th f0 f1 f2 f3 f4 f5 f6 g0 g1 g2 g3 g4 g5 g6 h0 h1 h2 h3 h4 h5 h6 5th i0 i1 i2 i3 i4 i5 i6 j0 j1 j2 j3 j4 j5 j6 k0 k1 k2 k3 k4 k5 k6 ... nth iiiiiiiiii i iiiiiiiiii MESSAGE WORD i0 i1 i2 i3 i4 i5 i6 i7 i8 i9 i10 i11 i12 i13 i14 i15 i16 i17 i18 i19 i20 1st K0 K1 K2 K3 K4 K5 K6 K7 K8 K9 C0 F0 F1 N0 N1 N2 N3 N4 N5 U0 V0 2nd a0 a1 a2 a3 a4 a5 a6 b0 b1 b2 b3 b4 b5 b6 c0 c1 c2 c3 c4 c5 c6 3rd d0 d1 d2 d3 d4 d5 d6 e0 e1 e2 e3 e4 e5 e6 f0 f1 f2 f3 f4 f5 f6 4th g0 g1 g2 g3 g4 g5 g6 h0 h1 h2 h3 h4 h5 h6 i0 i1 i2 i3 i4 i5 i6 5th j0 j1 j2 j3 j4 j5 j6 k0 k1 k2 k3 k4 k5 k6 l0 l1 l2 l3 l4 l5 l6 ... nth iiiiiiiiii i iiiiiiiiii |
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