PSB7238 SIEMENS [Siemens Semiconductor Group], PSB7238 Datasheet - Page 109

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

General Purpose I/O Data Direction Register
Value after reset: 00
IIOD(3-0)
General Purpose I/O Data Register
Value after reset: 00
IIOR(3-0)
General Purpose I/O Strobe Register
Value after reset: 00
IIOS(3-1)
IIOS0
Semiconductor Group
I/O Line Direction
0
1
I/O Line Data
In a write access to GPR the value will stored in the GPR. For those
ports which are configured as output the value is driven on the
corresponding pin GPx. As a consequence, GPR can be initialized even
before the coressponding pin is configured as output.
A read access to GPR will return the current status on the pin GPx,
independent of whether the pin GPx is configured as input or output.
I/O Strobe Select
0
1
I/O Strobe Mode
0
1
If strobed operation is disabled, the input pins are sampled
continuously.
If strobed is selected, input pins are latched during GP0 = 0. The latch
is closed when GP0 = 1
H
H
H
Pin GPx is input
Pin GPx is output
input pin GPx is not strobed
input pin GPx performes strobed operation
strobe mode is disabled. GP0 is used as general I/O pin
strobe mode is selected (only valid if GP0 is configured as input).
109
Read/Write
Read/Write
Read/Write
Register Description
Data Sheet 1998-07-01
Address 2031
Address 2032
Address 2033
PSB 7238
H
H
H