參數(shù)資料
型號(hào)： S5T8701
廠商： SAMSUNG SEMICONDUCTOR CO. LTD.
英文描述： FLEX ROAMING DECODER II
中文描述： FleX創(chuàng)建漫游解碼器二
文件頁(yè)數(shù)： 48/70頁(yè)
文件大?。?/td> 506K
代理商： S5T8701
FLEX
TM
ROAMING DECODER II
S5T8701
48
STATUS PACKET
The Status Packet contains various types of information that the host may require. The Status Packet will be sent
to the host whenever the S5T8701 is polled and has no other data to send. The S5T8701 can also prompt the
host to read the Status Packet due to events for which the S5T8701 was configured to send it (see "Configuration
Packet" on page 18 and "Control Packet" on page 21 for a detailed description of the bits). The S5T8701 will
prompt the host to read a Status Packet if the...
1.
SMU
bit in the Status Packet and the
SME
bit in the Configuration Packet are set.
2.
MT
bit in the Status Packet and the
MTE
bit in the Configuration Packet are set.
3.
EOF
bit in the Status Packet is set.
4.
LBU
bit in the Status Packet is set.
5.
EA
bit in the Status Packet is set.
6.
BOE
bit in the Status Packet is set.
The ID of the Status Packet is 127 (decimal).
Table 28: Status Packet Bit Assignments
Bit 7
0
FIV
SM
SMU
Bit 6
1
f
6
LB
LBU
Bit 5
1
f
5
x
x
Bit4
1
f
4
x
MT
Bit 3
1
f
3
c
3
x
Bit 2
1
f
2
c
2
EOF
Bit 1
1
f
1
c
1
EA
Bit 0
1
f
0
Byte 3
Byte 2
Byte 1
Byte 0
C
0
BOE
FIV:
Frame Info Valid. Set when a valid frame info word has been received since becoming synchronous
to the system and the f and c fields contain valid values. If this bit is clear, no valid frame info words
have been received since the S5T8701 became synchronous to the system. This value will change
from 0 to 1 at the end of block 0 of the frame in which the 1st frame info word was properly
received. It will be cleared when the S5T8701 goes into asynchronous mode. This bit is initialized to
0 when the S5T8701 is reset and when the S5T8701 is turned off by clearing the ON bit in the
Control Packet.
f:
Current frame number. This value is updated every frame regardless of whether the S5T8701
needs to decode the frame. This value will change to its proper value for a frame at the end of
block 0 of the frame. The value of these bits is not guaranteed when FIV is 0.
SM:
Synchronous Mode. This bit is set when the S5T8701 is synchronous to the system. The S5T8701
will set this bit when the first synchronization words are received. It will clear this bit when the
S5T8701 has not received both synchronization words in any frame for 8, 16, or 32 minutes
(depending on the number of assigned frames and the system collapse). This bit is initialized to 0
when the S5T8701 is reset and when it is turned off by clearing the ON bit in the Control Packet
LB:
Low Battery. Set to the value last read from the LOBAT pin. The host controls when the LOBAT pin
is read via the Receiver Control Packets. This bit is initialized to 0 at reset. It is also initialized to the
inverse of the LBP bit in the Configuration Packet when the S5T8701 is turned on by setting the ON
bit in the Control Packet.
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