ks8701 Samsung Semiconductor, Inc., ks8701 Datasheet - Page 52

• Manufacturer Part Number: ks8701
• Description: Flextm Roaming Decoder Ii
• Manufacturer: Samsung Semiconductor, Inc.

KS8701
STATUS PACKET
sent to the host whenever the KS8701 is polled and has no other data to send. The KS8701 can also prompt the
host to read the Status Packet due to events for which the KS8701 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 KS8701 will
prompt the host to read a Status Packet if the...
Table 28: Status Packet Bit Assignments
The Status Packet contains various types of information that the host may require. The Status Packet will be
FIV:
f:
SM:
LB:
Byte 3
Byte 2
Byte 1
Byte 0
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).
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 KS8701 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 KS8701 goes into asynchronous mode. This bit is initialized to 0 when the KS8701 is
reset and when the KS8701 is turned off by clearing the ON bit in the Control Packet.
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.
set this bit when the first synchronization words are received. It will clear this bit when the KS8701 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 KS8701 is
reset and when it is turned off by clearing the ON bit in the Control Packet
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 KS8701 is turned on by setting the ON bit
in the Control Packet.
Current frame number. This value is updated every frame regardless of whether the KS8701 needs to
Low Battery. Set to the value last read from the LOBAT pin. The host controls when the LOBAT pin is
Synchronous Mode. This bit is set when the KS8701 is synchronous to the system. The KS8701 will
Bit 7
SMU
FIV
SM
0
Bit 6
LBU
LB
f
1
6
Bit 5
FLEX
1
f
x
x
5
TM
Roaming Decoder II
Bit 4
MT
f
1
x
4
Bit 3
c
f
1
x
3
3
Decoder-to-Host Packet Descriptions
Bit 2
EOF
c
f
1
2
2
Bit 1
EA
c
f
1
1
1
Bit 0
BOE
C
1
f
0
0
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