PSD4134F-C-15J View Datasheet(PDF) - STMicroelectronics
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Description
Manufacturer
PSD4134F-C-15J Datasheet PDF : 110 Pages
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PSD8XX Family
The
PSD835G2
Functional
Blocks
(cont.)
PSD835G2
9.4.2 Port Operating Modes
The I/O Ports have several modes of operation. Some modes can be defined using
PSDsoft, some by the microcontroller writing to the 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, Address Input, Peripheral I/O and MCU Reset modes 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 16 summarizes which modes are available on each port. Table 17 shows how and
where the different modes are configured. Each of the port operating modes are described
in the following subsections.
Table 16. Port Operating Modes
Port Mode
Port A Port B
MCU I/O
Yes
Yes
PLD I/O
McellA Outputs
Yes
No
McellB Outputs
No
Yes
Additional Ext. CS Outputs No
No
PLD Inputs
Yes
Yes
Address Out
No
No
Address In
Yes
Yes
Data Port
No
No
Peripheral I/O
No
No
JTAG ISP
No
No
*Can be multiplexed with other I/O functions.
Port C
Yes
No
No
Yes
Yes
No
Yes
No
No
No
Port D
Yes
No
No
No
Yes
No
Yes
No
No
No
Port E
Yes
No
No
No
No
Yes
(A7-0)
No
No
No
Yes*
Port F
Yes
No
No
Yes
Yes
Yes
(A7-0)
Yes
Yes
Yes
No
Port G
Yes
No
No
No
No
Yes
(A7-0)
or
(A15-8)
No
No
No
No
54
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