PSD913F1-B-90JI ST Microelectronics, PSD913F1-B-90JI Datasheet - Page 48
PSD913F1-B-90JI
Manufacturer Part Number
PSD913F1-B-90JI
Description
Flash In-System Programmable ISP Peripherals For 8-bit MCUs
Manufacturer
ST Microelectronics
Datasheet
1.PSD913F1-B-90JI.pdf
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The
PSD9XX
Functional
Blocks
(cont.)
44
PSD9XX Family
9.4.2 Port Operating Modes
The I/O Ports have several modes of operation. Some modes can be defined in
PSDsoft, some by the microcontroller writing to the Control Registers in CSIOP space, and
some by both. The modes that can only be defined using PSDsoft must be
programmed into the device and cannot be changed unless the device is reprogrammed.
The modes that can be changed by the microcontroller can be done so dynamically
at run-time. The PLD I/O, Data Port, and Address Input, are the only modes that must
be defined before programming the device. All other modes can be changed by the
microcontroller at run-time.
Table 20 summarizes which modes are available on each port. Table 23 shows how and
where the different modes are configured. Each of the port operating modes are described
in the following subsections.
Table 20. Port Operating Modes
MCU I/O
PLD Outputs
PLD Inputs
Address Out
Address In
Data Port
JTAG ISP
Port Mode
Yes
Yes
Yes
Yes (A7 – 0)
Yes
Yes (D7 – 0)
No
Port A
Yes
Yes
Yes
Yes (A7 – 0)
or A15 – 8)
Yes
No
No
Port B
Port C
Yes
No
Yes
No
Yes
No
Yes
Preliminary Information
Port D
Yes
Yes
Yes
No
Yes
No
No
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