MC68181 Datasheet, PDF (40/119 Pages) Freescale Semiconductor, Inc – Advance Information ROAMING FLEX chip SIGNAL PROCESSOR

MC68181
Freescale Semiconductor, Inc.
FLEX Message Word Definitions
message, the message is interrupted (stopped) on the last full character boundary in
the last code word in the fragment. Any unused bits follow the rule just stated. The
final fragment follows the above rules except when the last character is all 1s or all 0s
and it exactly fills the last code word. In this case, an additional word must be sent of
opposite polarity of all 1s or all 0s to signify the position of the last character, thus
allowing that last character to be an all 1s or an all 0s character pattern.
Note: This is always the case when a binary message ends in the last bit of the last
word.
MESSAGE HEADER
A message header is designated by setting the H bit to 1. This is a displayable tag
associated with a transparent non-displayable data message. The tag and the
associated message are complete in themselves. The pager associates the header
message with the data file based on the two having the same message number and
being sent in sequence (header first followed by data file).
Alphanumeric Message
The following tables describe the bit format of the alphanumeric messages. The 7-bit
characters of the message are designated as lower case letters a, b, c, d, etc.
Alphanumeric messages can be sent as fragments. The service provider has the
option of dividing the message into several pieces and sending the separate pieces at
any time within a given time period.
Table A-7 Vector type V = 101 First Only Fragment
Message
Word
i₀
i₁
i₂
i₃
i₄
i₅
i₆
i₇
i₈
i₉
i₁₀ i₁₁ i₁₂ i₁₃ i₁₄ i₁₅ i₁₆ i₁₇ i₁₈ i₁₉ i₂₀
1st
K₀ K₁ K₂ K₃ K₄ K₅ K₆ K₇ K₈ K₉ C₀ F₀ F₁ N₀ N₁ N₂ N₃ N₄ N₅ R₀ M₀
2nd
S₀ S₁ S₂ S₃ S₄ S₅ S₆ a₀ a₁ a₂ a₃ a₄ a₅ a₆ b₀ b₁ b₂ b₃ b₄ b₅ b₆
3rd
c₀ c₁ c₂ c₃ c₄ c₅ c₆ d₀ d₁ d₂ d₃ d₄ d₅ d₆ e₀ e₁ e₂ e₃ e₄ e₅ e₆
4th
f₀ f₁ f₂ f₃ f₄ f₅ f₆ g₀ g₁ g₂ g₃ g₄ g₅ g₆ h₀ h₁ h₂ h₃ h₄ h₅ h₆
5th
i₀ i₁ i₂ i₃ i₄ i₅ i₆ j₀ j₁ j₂ j₃ j₄ j₅ j₆ k₀ k₁ k₂ k₃ k₄ k₅ k₆
...
nth
iiiiiiiiiiiiiiiiiiiii
A-12
MC68181 Technical Data Sheet
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