DS_S5T8702 Datasheet, PDF (28/62 Pages) Samsung semiconductor – FEEX ALPHANUMERIC DECODER II

S5T8702
FEEX^TM ALPHANUMERIC DECODER II
FRAME ASSIGNMENT PACKETS
The FLEX protocol defines that each address of a FLEX pager is assigned a home frame and a battery cycle.
The S5T8702 must be configured so that a frame that is assigned by one or more of the addresses home frames
and battery cycles has its corresponding configuration bit set. For example, if the S5T8702 has one enabled
address and it is assigned to frame 3 with a battery cycle of 4, the AF bits for frames 3, 19, 35, 51, 67, 83, 99,
and 115 should be set and the AF bits for all other frames should be cleared.
When the S5T8702 is configured for manual collapse mode by setting the MCM bit in the Roaming Control
Packet, the S5T8702 will not apply the received system collapse to the AF bits. The host should set the AF bits
for all frames that should be decoded on all channels. For example, if frames 0 and 64 should be decoded on
one channel and frames 4, 36, 68, and 100 should be decoded on another channel, all six of the corresponding
AF bits should be set. The host can then change the receiver's carrier frequency after the S5T8702 decodes
frames 0, 36, 64, and 100.
There are 8 Frame Assignment Packets. The Packet IDs for these packets range from 32 to 39 (decimal).
Byte 3
Byte 2
Byte 1
Byte 0
Bit 7
0
0
AF₁₅
AF₇
Table 16: Frame Assignment Packet Bit Assignments
Bit 6
0
0
AF₁₄
AF₆
Bit 5
1
0
AF₁₃
AF₅
Bit 4
0
0
AF₁₂
AF₄
Bit 3
0
0
AF₁₁
AF₃
Bit 2
f₂
0
AF₁₀
AF₂
Bit 1
f₁
0
AF₉
AF₁
Bit 0
f₀
0
AF₈
AF₀
f:
Frame range. This value determines which 16 frames correspond to the 16 AF bits in the packet
according to the following table. At least one of these bits must be set when the S5T8702 is turned
on by setting the ON bit in the control packet. (value after reset=0)
f₂ f₁ f₀
000
001
010
011
100
101
110
111
AF₁₅
Frame 127
Frame 111
Frame 95
Frame 79
Frame 63
Frame 47
Frame 31
Frame 15
AF₀
Frame 112
Frame 96
Frame 80
Frame 64
Frame 48
Frame 32
Frame 16
Frame 0
AF:
Assigned Frame. If a bit is set, the S5T8702 will consider the corresponding frame to be assigned
via an address's home frame and pager collapse. (value after reset=0)
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