PCD5008 datasheet(32/64 Pages) PHILIPS

32 / 64 page

1998 Jun 17

Philips Semiconductors

Product speciﬁcation

FLEX

™ Pager Decoder

PCD5008

8.6.7

CONFIGURATION OF ASSIGNED FRAMES AND PAGER

COLLAPSE

(ID = 20H TO 27H)

The assigned frame and collapse value determine the

frames in which the decoding device typically looks for

messages (other system factors can cause the decoding

device to look in other frames in addition to the typical

frames).

The PCD5008 must be configured explicitly to receive all

required frames by setting the associated assigned

frame (AF) bits. For each enabled CAPCODE these are

the base frame and the associated frames implied by the

pager collapse value. For example if the PCD5008 has

one enabled address and it is assigned to base frame 3

with a collapse value of 4, the AF bits for

frames 3, 19, 35, 51, 67, 83, 99 and 115 should be set

and the AF bits for all other frames should be cleared.

There are 8 frame assignment packets each capable of

assigning a range of 16 consecutive frame numbers.

f: frame range, see Table 29 for location in the frame

assignment packet and Table 28 for the AFs and values.

The value determines which 16 frames out of a range

of 128 correspond to the 16 AF bits in the packet. At least

one of these bits must have been set when the PCD5008

is turned on by setting the ON bit in the control packet.

Value after reset = 0.

AF: assigned frame (Table 29). If a bit is set, the PCD5008

decodes the associated FLEX

™ frame and scans its

contents for enabled addresses. Value after reset = 0.

Table 28 Frame assignment ranges

8.6.8

CONFIGURATION OF ASSIGNED PHASE

The assigned phase is required only for single-phase

devices. It determines the phase (A, B, C, or D) in which

the messages are received. For details of phase

calculation see Section 8.6.5. For details of programming

the assigned phase see Section 8.4.7.

AF15

AF0

frame 127

frame 112

frame 111

frame 96

frame 95

frame 80

frame 79

frame 64

frame 63

frame 48

frame 47

frame 32

frame 31

frame 16

frame 15

frame 0

Table 29 Frame assignment packet bit assignments

BYTE

BIT 7

BIT 6

BIT 5

BIT 4

BIT 3

BIT 2

BIT 1

BIT 0

300100

200000000

1AF15

AF14

AF13

AF12

AF11

AF10

AF9

AF8

0AF7

AF6

AF5

AF4

AF3

AF2

AF1

AF0

PCD5008 Datasheet(PDF) 32 Page - NXP Semiconductors

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