MC68181 Datasheet, PDF (51/119 Pages) Freescale Semiconductor, Inc – Advance Information ROAMING FLEX chip SIGNAL PROCESSOR

Freescale Semiconductor, Inc.
MC68181
FLEX Message Word Definitions
ACCURATE SECONDS/DAYLIGHT SAVINGS TIME/TIME ZONE
Table A-18 System Message Block Information Word Definition
f₂f₁f₀ s₁₃ s₁₂ s₁₁ s₁₀ s₉ s₈ s₇ s₆ s₅ s₄ s₃ s₂ s₁ s₀
Description
101 S₂ S₁ S₀ x L₀ z₄ z₃ z₂ z₁ z₀ 0 1 0 X System Message¹
Note:
1. When the s₃ s₂ s₁ s₀ field is set to 0100 or 0101, the other s₄ through s₁₃ are defined as
above. The system messages with the s₃ s₂ s₁ s₀ field set to some other value do not contain
time related information.
2. S = Accurate Seconds—This field provides a more accurate seconds reference and can be
used to adjust the seconds to within 1 second. This field represents how much time should
be added to the coarse seconds in sixty-fourth of a minute increments.
L = Daylight Savings Time—When this bit is set, the time being transmitted is local
standard time. When it is clear, the time being transmitted is Daylight Savings Time.
z = Time Zone—These bits indicate the time zone for which the time is being transmitted.
The offset from GMT is the offset for local standard time. The following table describes the
values for z.
z₄z₃z₂z₁z₀
00000
00001
00010
00011
00100
00101
00110
00111
01000
01001
01010
Time Zone
GMT
GMT + 0100
GMT + 0200
GMT + 0300
GMT + 0400
GMT + 0500
GMT + 0600
GMT + 0700
GMT + 0800
GMT + 0900
GMT + 1000
Table A-19 Time Zone Values
z₄z₃z₂z₁z_{0 Time Zone}
z₄z₃z₂z₁z₀
01011
01100
01101
01110
01111
10000
10001
10010
10011
10100
10101
GMT + 1100
GMT + 1200
GMT + 0330
GMT + 0430
GMT + 0530
RESERVED
GMT + 0545
GMT + 0630
GMT + 0930
GMT – 0330
GMT – 1100
10110
10111
11000
11001
11010
11011
11100
11101
11110
11111
Time Zone
GMT – 1000
GMT – 0900
GMT – 0800
GMT – 0700
GMT – 0600
GMT – 0500
GMT – 0400
GMT – 0300
GMT – 0200
GMT – 0100
MOTOROLA
MC68181 Technical Data Sheet
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Go to: www.freescale.com
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