PCD5013 datasheet(44/76 Pages) PHILIPS

44 / 76 page

1999 Apr 12

Philips Semiconductors

Product speciﬁcation

FLEX

™ roaming decoder II

PCD5013

8.7.7

SHORT INSTRUCTION VECTOR

V: these bits are set 001 for a short instruction vector.

WN: word number of vector (2 to 87 decimal) (Table 46).

WN describes the location of the vector word in the frame.

e: error (Table 46). Set if more than 2-bit errors are

detected in the word, if the check character calculation fails

after error correction has been performed, or if the vector

value is determined to be invalid.

p: phase (Table 46). This is the phase on which the vector

was found (0 = A, 1 = B,2=Cand3=D).

i: instruction type (Tables 46 and 47). These bits define

the meaning of the d bits in this packet.

x: unused bits (Table 46). The value of these bits is not

guaranteed.

d: data bits whose definition depend on the value of the

i bits in this packet according to Table 47. Note that if this

vector is received on a long address and the e bit in this

packet is not set, the decoder sends a message packet

immediately following the vector packet. All message bits

in the message packet are unused and should be ignored.

Table 46 Short instruction vector packet bit assignments

Table 47 Short instruction vector deﬁnitions

Notes

1. Assigned temporary address index a and associated frame number f (Section 8.8.5).

2. Refer to

”FLEX

™ Protocol specification G1.9”.

BYTE

BIT 7

BIT 6

BIT 5

BIT 4

BIT 3

BIT 2

BIT 1

BIT 0

WN6

WN5

WN4

WN3

WN2

WN1

WN0

d10

0d4

d10

DESCRIPTION

000

temporary address assignment,

note 1

001

d10

system event; note 2

010

temporary address with message

sequence number; note 2

reserved

reserved for test

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