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參數(shù)資料
| 型號： | KT8555 |
| 廠商： | SAMSUNG SEMICONDUCTOR CO. LTD. |
| 英文描述： | TIME SLOT ASSIGNMENT CIRCUIT |
| 中文描述： | 時間槽分配電路 |
| 文件頁數(shù)： | 4/6頁 |
| 文件大?。?/td> | 96K |
| 代理商： | KT8555 |
KT8555 TIME SLOT ASSIGNMENT CIRCUIT
APPLICATION INFORMATION
OPERATING CONTROL MODE 1
The KT8555 is a control interface which requires an 8 bit serial control word. Either one of the frame sync output group,
FS
X
0 to FX
X
3 or FS
R
0 to FS
R
3, affected by the control word is defined by the two bits, X and R. Time slot selected
from 0 to 63 is specified. A frame sync output is highly active for one time slot which is equivalent to 8 cycles of BCLK.
Up to 64 time slots are allowed to form a frame. There are two operational mode. In mode 1, each channel of transmit
and receive direction has different time slot assigned. This mode can be selected by either leaving pin 9 (MODE) opened
or connecting it with V
CC.
In such a case, pin 13 is RSYC input defining the start of each receive frame while four output,
FS
R
0 to FS
R
3, are assigned with respect to RSYC. On the other hand, start of each transmit frame is defined by
XSYC input by which output FS
X
0 to FS
X
3, are assigned. XSYC and RSYC can be phase related. Channels from
0-3 are selected by the input CH0 and CH1 (refer to the table 1).
X is the first bit clocked into D
C
input
CONTROL DATA FORMAT
TABLE 1. OPERATING CONTROL MODE 1
OPERATING CONTROL MODE 2
In mode 2, all 8 frame sync outputs can be assigned with respect to XSYC input. The mode 2, selected by connecting
pin 9 (MODE) to GND, enables the KT8555 TSAC suitable for an 8-channel unidirectional controller and for a system where
both transmit and receive direction of each channel have same time slot assigned. For instance, FS
X
and FS
R
input of
1 CHIP CODEC are hard wired together. The channel assigned has its channel selected by CH0, CH1 and CH2 (refer
to table 2).
TABLE 2. OPERATING CONTROL MODE 2
X
R
T5
T4
T3
T2
T1
T0
CH1
0
0
1
1
CH0
0
1
0
1
Channel Selected
Assign to FS
X
0 and/or FS
R
0
Assign to FS
X
1 and/or FS
R
1
Assign to FS
X
2 and/or FS
R
2
Assign to FS
X
3 and/or FS
R
3
T5 T4 T3 T2 T1 T1
0 0 0 0 0 0
0 0 0 0 0 1
0 0 0 0 1 0
Time Slot
0
1
2
.
.
.
30
31
32
33
.
.
.
63
0 1 1 1 1 0
0 1 1 1 1 1
1 0 0 0 0 0
1 0 0 0 0 1
1 1 1 1 1 1
X
0
0
1
1
R
0
1
0
1
Action
Assign time slot to both selected FS
X
and FS
R
Assign time slot to selected FS
X
only
Assign time slot to selected FS
R
only
Disable both selected FS
X
and FS
R
CH2
0
0
0
0
1
1
1
1
CH1
0
0
1
1
0
0
1
1
CH0
0
1
0
1
0
1
0
1
Channel Selected
Assign to FS
X
0
Assign to FS
X
1
Assign to FS
X
2
Assign to FS
X
3
Assign to FS
R
0
Assign to FS
R
1
Assign to FS
R
2
Assign to FS
R
3
X
0
0
1
1
R
0
1
0
1
Action
Assign time slot to selected output
Assign time slot to selected output
Assign time slot to selected output
Disable both selected output
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