PSB7238 SIEMENS [Siemens Semiconductor Group], PSB7238 Datasheet - Page 118

• Manufacturer Part Number: PSB7238
• Description: Joint Audio Decoder-Encoder - Multimode
• Manufacturer: SIEMENS [Siemens Semiconductor Group]

Semiconductor Group
Mode Register
MODE
TMO
RAC
XAC
TLP
ERFS
ETFS
Enable RFS generation
Transparent Mode
A ‘1’ selects the transparent non-HDLC mode, where no HDLC framing
functions are implemented. In transparent mode, data reception and
transmission is started time-slot aligned.
Receiver Active
Sets the receiver in an active state, where the receiver goes into the hunt
mode
Note: In transparent mode, when RAC is set to ‘1’, storage of bytes in the
Transmitter Active
When ‘1’, the HDLC transmitter transmits on the line and in the time-slot
assigned to it (interframe time-fill if no data is available). When XAC = 0, the
time-slot assigned to the transmitter is in high impedance.
Note: In transparent mode, when XAC is set to ‘1’, transmission of bytes
Test Loop
When ‘1’, output of the HDLC controller is connected to input (i.e. what is
transmitted is simultaneously received). The loop is transparent.
Only valid when RFIN = 0 (RFS pulses internally generated) and used if
RCONT bit in RFS mode register is ‘1’.
When RCONT = 1, an ERFS value of ‘1’ enables the generation of RFS
pulses of one bit duration and spaced RPRD + 1 (1, …, 32) 16-bit words
from each other. Pulses are generated indefinitely until ERFS is set to ‘0’
again.
Enable TFS generation
Only valid when TFIN = 0 (TFS pulses internally generated) and used if
TCONT bit in TFS mode register is ‘1’.
When TCONT = 1, an ETFS value of ‘1’ enables the generation of TFS
pulses of one bit duration and spaced TPRD + 1 (1, …, 32) 16-bit words
from each other. Pulses are generated indefinitely until ETFS is set to ‘0’
again.
TMO
Bit 7
1)
receive FIFO starts time-slot aligned.
from the transmit FIFO starts time-slot aligned.
(see Page 127).
RAC
XAC
MODE
118
TLP
Read/Write
Register Description
Data Sheet 1998-07-01
Address 22
ERFS
PSB 7238
ETFS
Bit 0
H