PSB7238 SIEMENS [Siemens Semiconductor Group], PSB7238 Datasheet - Page 52
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PSB7238
Manufacturer Part Number
PSB7238
Description
Joint Audio Decoder-Encoder - Multimode
Manufacturer
SIEMENS [Siemens Semiconductor Group]
Datasheet
1.PSB7238.pdf
(190 pages)
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Semiconductor Group
The maskable interrupt status bits for controlling the transfer are:
BFUL
BEMP
or optionally:
FSC
RFS
TFS
In addition, the control bits HXA1 and HXA2 control whether the corresponding transmit
channel is loaded into the shift register from the XC1/2 register accessible from the DSP
(HXA = 0) or from the host (HXA = 1).
The block diagrams for the receive and transmit audio channels are shown in the
following Figures.
Figure 21
Receive 1,2:
DCL(/2)
FSC
RFS
SCLK
TFS
SCLK
Buffer full (RC1 or RC2).
Buffer empty (XC1 or XC2).
Frame sync interrupt (FSC).
Frame sync interrupt (RFS).
Frame sync interrupt (TFS).
SLIN
0x
10
11
2
M
U
X
Time-slot
Parameters
LMOD
Time-slot
Count
Logic
LBIT
5
Enable
BFUL
TS-Clock
52
Load*
RCx
1 to 32 bits (LBIT)
Shift Register
Host/DSP
32 bits
Data Sheet 1998-07-01
Functional Blocks
SLIN
M
U
X
00
01
10
11
2
PSB 7238
DU
DD
SR
ST
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