PSB21473FV13XT Infineon Technologies, PSB21473FV13XT Datasheet - Page 148

• Manufacturer Part Number: PSB21473FV13XT
• Manufacturer: Infineon Technologies

Specifications of PSB21473FV13XT

• Operating Supply Voltage (typ): 3.3V
• Operating Supply Voltage (min): 3.135V
• Operating Supply Voltage (max): 3.6V
• Operating Temp Range: 0C to 70C
• Operating Temperature Classification: Commercial
• Mounting: Surface Mount
• Pin Count: 144
• Lead Free Status / RoHS Status: Compliant

Data Sheet
9.5.1
During external bus cycles that use segmentation (ie. an address space above
64 KByte) a number of Port 4 pins may output the segment address lines. The number
of pins that is used for segment address output determines the external address space
which is directly accessible. The other pins of Port 4 (if any) may be used for general
purpose I/O. If segment address lines are selected, the alternate function of Port 4 may
be necessary to access eg. external memory directly after reset. For this reason Port 4
will be switched to its alternate function automatically.
The number of segment address lines is selected via PORT0 during reset. The selected
value can be read from bitfield SALSEL in register RP0H (read only) eg. in order to check
the configuration during run time.
Table 9-3 summarizes the alternate functions of Port 4 depending on the number of
selected segment address lines (coded via bitfield SALSEL).
•
Table 9-3
Port 4 Pin
P4.0
P4.1
P4.2
P4.3
P4.4
P4.5
Figure 9-9
Port 4
Alternate Function
General Purpose
Input/Output
Alternate Functions of PORT4
Std. Function
SALSEL=01 64 KB
Gen. purpose I/O
Gen. purpose I/O
Gen. purpose I/O
Gen. purpose I/O
Gen. purpose I/O
Gen. purpose I/O
Alternate Functions of Port 4
Port 4 I/O and Alternate Functions
-
-
-
-
-
-
-
-
-
P4.5
P4.4
P4.3
P4.2
P4.1
P4.0
Altern. Function
SALSEL=11 256KB
Seg. Address A16
Seg. Address A17
Gen. purpose I/O
Gen. purpose I/O
Gen. purpose I/O
Gen. purpose I/O
148
-
-
-
-
-
-
-
-
-
A21
A20
A19
A18
A17
A16
Altern. Function
SALSEL=00
Seg. Address A16
Seg. Address A17
Seg. Address A18
Seg. Address A19
Gen. purpose I/O
Gen. purpose I/O
1 MB
Altern. Function
SALSEL=10
Seg. Address A16
Seg. Address A17
Seg. Address A18
Seg. Address A19
Seg. Address A20
Seg. Address A21
Parallel Ports
PSB 21473
2003-03-31
INCA-D
4 MB