PSB7238 SIEMENS [Siemens Semiconductor Group], PSB7238 Datasheet - Page 90

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

Semiconductor Group
General Configuration Register
Value after reset: B0
PU
CRS
CKOEN
CKOS
ODS
CKOBR
(18-16)
Power Up
0
1
Clock Rate Select
0
1
CLKO Enable
0
1
When PU is ‘0’ and CKOEN is ‘0’, all outputs and input/outputs of the
PSB 7238 are in the high-impedance state.
Source clock for CLKO output pin
0
1
Open drain select for IOM DU and DD lines:
0
1
Most significant bits of baud rate division factor for CLKO output from
DSP clock.
H
The DSP clock is turned off. It can be started again with a DSP
interrupt.
Normal operation
This is the value of PU after a hardware reset.
Input DCL is twice the bit rate on IOM-2.
Input DCL is equal to the bit rate on IOM-2.
CLKO disabled (output high-impedance), CLKO generator
initialized and idle.
Enables generation of CLKO (value during and after reset).
Internal DSP system clock is input for divider connected to
CLKO.
CLKO outputs 7.68 MHz, may be used to clock e.g. an ISAC-S
(value during and after reset).
DD and DU are open drain (reset value).
DD and DU are push-pull.
90
Read/Write
Register Description
Data Sheet 1998-07-01
Address 2002
PSB 7238
H