mc68181 Freescale Semiconductor, Inc, mc68181 Datasheet - Page 50

• Manufacturer Part Number: mc68181
• Description: Signal Processor
• Manufacturer: Freescale Semiconductor, Inc

MC68181
FLEX Message Word Definitions
FLEX Local Time And Date
A-22
MONTH/DAY/YEAR
SECOND/MINUTE/HOUR
The FLEX protocol allows for systems to transmit time information in its Block
Information Field. When a system provider supports local time transmissions, the
system provider is required, at a minimum, to transmit at least one time related block
information word in each phase transmitted in frame 0, cycle 0. The time transmitted
is the local time for the transmitted time zone and refers to the actual time at the
leading edge of the first bit of Sync 1 of Frame 0 of the current cycle. The information
carried in the s bits of the block information word depend on the value of the f bits of
the block information word. The following sections describe the bit definitions of the
time related block information words.
Table A-17 Second/Minute/Hour Block Information Word Definition
Table A-16 Month/Day/Year Block Information Word Definition
f
010
Note:
2
f
Note:
f
2
1
f
001
f
1
0
f
0
S = Second field—This represents a coarse value of the seconds
field. These bits represent the seconds in eighth of a minute (7.5
second) increments. 000 through 111 (binary) correspond to 0
through 52.5 seconds, respectively
M = Minute field—000000 through 111011 (binary) correspond to 0
through 59, respectively
H = Hour field—00000 through 10111 (binary) correspond to 0
through 23, respectively.
s
S
m = Month field—0001 through 1100 (binary) correspond to
January through December, respectively
d = Day field—00001 through 11111 (binary) correspond to 1
through 31, respectively
Y = Year field—This represents the year with modulo arithmetic.
00000 through 11111 (binary) representing 1994 through 2025,
2026 through 2057, etc.
13
5
s
m
13
3
s
S
MC68181 Technical Data Sheet
Freescale Semiconductor, Inc.
12
4
s
m
12
For More Information On This Product,
2
s
S
11
3
s
m
11
1
s
M
10
s
m
5
10
0
s
M
Go to: www.freescale.com
9
s
d
4
9
4
s
M
8
s
d
3
8
3
s
M
7
s
d
2
7
2
s
M
6
s
d
1
6
1
s
M
5
s
d
0
5
0
s
H
4
4
s
Y
4
4
s
H
3
s
Y
3
3
3
s
H
2
s
Y
2
2
2
s
H
1
s
Y
1
1
1
s
H
0
s
Y
0
0
0
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