DS_S5T8702 Datasheet, PDF (18/62 Pages) Samsung semiconductor – FEEX ALPHANUMERIC DECODER II

S5T8702
FEEX^TM ALPHANUMERIC DECODER II
CONTROL PACKET
The Control Packet defines a number of different control bits for the S5T8702. The ID of the Control Packet is 2.
Byte 3
Byte 2
Byte 1
Byte 0
Bit 7
0
FF₇
0
0
Table 5: Control Packet Bit Assignments
Bit 6
0
FF₆
SPM
SBI
Bit 5
0
FF₅
PS₁
0
Bit 4
0
FF₄
PS₀
MTC
Bit 3
0
FF₃
0
0
Bit 2
0
FF₂
0
0
Bit 1
1
FF₁
0
EAE
Bit 0
0
FF₀
0
ON
FF:
SPM:
PS:
Force Frame 0-7. These bits enable and disable forcing the S5T8702 to look in frames 0 through 7.
When an FF bit is set, the S5T8702 will decode the corresponding frame. Unlike the AF bits in the
Frame Assignment Packets, the system collapse of a FLEX system will not affect frames assigned
using the FF bits (e.g. Where as setting AF₀ to 1 when the system collapse is 5 will cause the
S5T8702 to decode frames 0, 32, 64, and 96, setting FF₀ to 1 when the system collapse is 5 will
only cause the S5T8702 to decode frame 0.). This may be useful for acquiring transmitted time
information or channel attributes (e.g. Local ID). (value after reset =0)
Single Phase Mode. When this bit is set, the S5T8702 will decode only one phase of the transmitted
data. When this bit is clear, the S5T8702 will decode all of the phases it receives. A change to this
bit while the S5T8702 is on, will not take affect until the next block 0 of the next decoded frame.
(value after reset =0)
Phase Select. When the SPM bit is set, these bits define what phase the S5T8702 should decode
according to the following table. This value is determined by the service provider. A change to
these bits while the S5T8702 is on, will not take affect until the next block 0 of a frame.
(value after reset =0)
PS Value
PS1
PS0
0
0
0
1
1
0
Phase Decoded (based on FLEX Data Rate)
1600bps
3200bps
6400bps
a
a
a
a
a
b
a
c
c
SBI:
MTC:
Send Block Information words 2-4. When this bit is set, any errored or time related block
information words 2-4 will be sent to the host. See "Block Information Word Packet" on page34 for
a description of the words sent. (value after reset=0)
Minute Timer Clear. Setting this bit will cause the one minute timer to restart from 0.
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