PCD5002USLASH10 datasheet(14/48 Pages) PHILIPS

14 / 48 page

1997 Jun 24

Philips Semiconductors

Product speciﬁcation

Advanced POCSAG and APOC-1 Paging

Decoder

PCD5002

Table 5

Call header format

Table 6

Call header bit identiﬁcation

Note

1. The DF bit in the call header is set:

a) When the sync word of the batch in which the (beginning of the) call was received, did not match the standard

POCSAG or a user-programmed sync word. The sync word identifier (bits S3 to S1) will then be made 0.

b) When any codeword of a previous call received in the same batch was uncorrectable.

Table 7

Message data format

Table 8

Message data bit identiﬁcation

Table 9

Call terminator format

BYTE NUMBER

BIT 7

(MSB)

BIT 6

BIT 5

BIT 4

BIT 3

BIT 2

BIT 1

BIT 0

(LSB)

E3E2E1

BITS (MSB to LSB)

IDENTIFICATION

S3 to S1

identiﬁer number of sync word for current batch (7 = standard POCSAG)

R3 to R1

identifier number of user address (RIC)

data fail mode indication (1 = data fail mode); note 1

F0 and F1

function bits of received address codeword (bits 20 and 21)

E3 to E1

detected error type; see Table 11; E3 = 0 in a concatenated call header

BYTE NUMBER

BIT 7

(MSB)

BIT 6

BIT 5

BIT 4

BIT 3

BIT 2

BIT 1

BIT 0

(LSB)

M2M3M4M5M6M7M8M9

M10

M11

M12

M13

M14

M15

M16

M17

M18

M19

M20

M21

BITS (MSB to LSB)

IDENTIFICATION

M2 to M21

message codeword data bits

E3 to E1

detected error type; see Table 11

message codeword flag

BYTE NUMBER

BIT 7

(MSB)

BIT 6

BIT 5

BIT 4

BIT 3

BIT 2

BIT 1

BIT 0

(LSB)

FTS3S2S1

XXXX

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