參數(shù)資料
型號(hào)： KS8701
廠商： SAMSUNG SEMICONDUCTOR CO. LTD.
英文描述： FLEXTM Roaming Decoder II
中文描述： FLEXTM漫游解碼器二
文件頁(yè)數(shù)： 13/73頁(yè)
文件大小： 434K
代理商： KS8701
SPI Packets
KS8701
12
FLEX
TM
Roaming Decoder II
PACKET COMMUNICATION INITIATED BY THE FLEX DECODER IC
Refer to figure 7 on page 12. When the KS8701 has a packet for the host to read, the following occurs:
1.
2.
3.
4. The host de-selects the KS8701 by driving the
SS
pin high (optional).
The KS8701 drives the
READY
pin low.
If the KS8701 is not already selected, the host selects the KS8701 by driving the
SS
pin low.
The host receives (and sends) a 32-bit packet.
Figure 7: Typical Multiple Packet Communications Initiated by the FLEX decoder IC
When the host is reading a packet from the KS8701, it must send a valid packet to the KS8701. If the host has
no data to send, it is suggested that the host send a Checksum Packet with all of the data bits set to 0 in order to
avoid disabling the KS8701. See
“
Checksum Packet
”
on page 16 for more details on enabling and disabling the
KS8701.
The following figure illustrates that it is not necessary to de-select the KS8701 between packets then the
packets are initiated by the KS8701.
Figure 8: Multiple Packet Communications Initiated by the FLEX decoder IC with No De-select
D1
D31
D1 D0
D31
D31
D31
D31
D31
D1
D1
D1
D1
D0
D0
D0
D0
D0
SS
READY
SCK
MOSI
MISO
High impedance state
$
%
"
#
SS
D31
D1 D0
D31
D31
D31
D31
D31
D1
D1
D1
D1
D1
D0
D0
D0
D0
D0
READY
SCK
MOSI
MISO
High-impedance state
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