PSB7238 SIEMENS [Siemens Semiconductor Group], PSB7238 Datasheet - Page 79

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

and written:
– via the Parallel Host Interface by using two registers (Conf/Cont Reg Address Register
For writing a configuration/control register (addresses 2000
the data register the data byte to be written and in the address register the write
command:
where A(5:0) gives the offset of the register to be written. This causes an RACC
(Register Access) interrupt status to the DSP. The DSP software transfers the data byte
to the requested address 2000
address 40
of the address register). By sensing the state of bit RDY the host is able to start a new
access to address and data registers when the DSP is ready.
For reading a configuration/control register (addresses 2000
in the address register the read command:
where A(5:0) gives the offset of the register to be read. This causes a RACC (Register
Access) interrupt status to the DSP. The DSP software transfers the contents of the
requested address 2000
4.5
Registers in the memory mapped (DSP X-data RAM) area from 2000
4.5.1
Semiconductor Group
at address 40
Bit 7
Bit 7
0
1
H
Programming Indirectly Accessible Registers
Programming via Parallel Host Interface
(see also Section 3.3.2)
/3040
0
0
H
/3040
H
) to ‘1’ again (which was set to ‘0’ by hardware at the time of writing
H
H
and Conf/Control Reg Data Register at address 41
A5
A5
+ A(5:0) into the data register and writes the RDY bit to ‘1’.
H
+ A(5:0) and writes the RDY bit (least significant bit of
A4
A4
79
A3
A3
A2
A2
H
- 203F
H
- 203F
Data Sheet 1998-07-01
H
Functional Blocks
H
), the host writes in
H
A1
A1
upwards are read
), the host writes
H
PSB 7238
/3041
Bit 0
Bit 0
A0
A0
H
)