HD6433937 Datasheet, PDF(378/521 Page) Hitachi Semiconductor – Hardware Manual

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HD6433937 Datasheet, PDF (378/521 Pages) Hitachi Semiconductor – Hardware Manual

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i: Instruction type. These bits define the meaning of the d bits in this packet.

x: Unused bits. The value of these bits is not guaranteed.

12.4.4 Message Packet

The Message Field follows the Vector Field in the FLEX protocol. It contains the message data,

checksum information, and may contain fragment numbers and message numbers.

If the error bit of a vector word is not set and the vector word indicates that there are message

words associated with the page, the message words are sent in Message Packets.

The ID of the Message Packet is the word number where the message word was received in the

frame.

Table 12-25 Message Packet Bit Assignments

Byte 3

Byte 2

Byte 1

Byte 0

Bit 7

0

e

i 15

i7

Bit 6

WN 6

p1

i 14

i6

Bit 5

WN5

p0

i 13

i5

Bit 4

WN4

i 20

i 12

i4

Bit 3

WN3

i 19

i 11

i3

Bit 2

WN 2

i 18

i 10

i2

Bit 1

WN1

i 17

i9

i1

Bit 0

WN 0

i 16

i8

i0

WN: Word number of message word (3 - 87 decimal). Describes the location of the message word

in the frame.

e: Set if more than 2 bit errors are detected in the word.

p: Phase on which the message word was found (0=a, 1=b, 2=c, 3=d)

i: These are the information bits of the message word. The definitions of these bits depend on the

vector type and which word of the message is being received.

12.4.5 Roaming Status Packet

The contents of this section apply to the FLEXâ¢ Roaming Decoder. They are not applicable to

the FLEXâ¢ Non-Roaming Decoder.

The FLEX decoder will automatically prompt the host to read a Roaming Status Packet if RSR,

MS1, MFI, MS2, MBI, MAW, NBU, NDR1 , NDR0 , or SCU is set.

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