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PCF5083H/F2 数据表(PDF) 53 Page - NXP Semiconductors |
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PCF5083H/F2 数据表(HTML) 53 Page - NXP Semiconductors |
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53 / 136 page ![]() 1996 Oct 29 53 Philips Semiconductors Objective specification GSM signal processing IC PCF5083 9.1.5.3 Format of uplink data frames The uplink data frame format is described in Table 43. Each word consists of four fields; these are described in Table 41. Table 41 Field descriptions Table 42 Classification of the 16-bit samples Note 1. The external terminal adaptor may insert at any position an arbitrary number of fill words with CMD = 11111. Table 43 Uplink data frame format Notes 1. X = don’t care. FIELD DESCRIPTION DATA This field contains the data bytes of user data block and control data block. Only words with CMD = 00001 contain valid data fields (see Table 42). CMD This field classifies the 16-bit samples as described in the Table 42. SYNC, INFO In uplink direction, these fields are without meaning. CMD FIELD DESCRIPTION 76543 00001 The data field contains a valid data byte belonging to either a user or a control data block. 00010 The data field contains auxiliary control information that may be used by the terminal adaptor for synchronization purposes; note 1. 11111 Indicates that the data field contains invalid data, which should be ignored. Other combinations Reserved for future expansion. Not used by the DSP. OFFSET DATA FIELD(1) CMD FIELD INFO FIELD SYNC FIELD DESCRIPTION 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 0 X 1 1 1 1 1 X X X User data block; this block contains modified CCITT frame in accordance with “GSM Rec. 05.03”. It is used as input data for the channel encoder. LU is the block length Valid range: 0 ≤ LU ≤ 33 X 1 1111 X X X LU 00001 X X X U[0] 0 0 0 0 1 X X X U[1] 0 0 0 0 1 X X X U(LU − 2) 00001 X X X U(LU − 1) 00001 X X X LC 0 0 0 0 1 X X X Control data block; the first byte LC is the block length. LC may also be zero. This block is forwarded to the System Controller. Valid range: 0 ≤ LC ≤ 10. C[0] 0 0 0 0 1 X X X C[1] 0 0 0 0 1 X X X C(LC − 2) 00001 X X X C(LC − 1) 00001 X X X 159 X 1 1 1 1 1 X X X |
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