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PSD813F2 Datasheet

  • PSD813F2

  • FLASH IN-SYSTEM PROGRAMMABLE (ISP) PERIPHERALS FOR 8-BIT MCU...

  • 1180.57KB

  • STMicroelectronics   STMicroelectronics

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PSD8XX Family
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.
The
PSD835G2
Functional
Blocks
(cont.)
Table 16. Port Operating Modes
Port Mode
MCU I/O
PLD I/O
McellA Outputs
McellB Outputs
Additional Ext. CS Outputs
PLD Inputs
Address Out
Yes
No
No
Yes
No
No
Yes
No
Yes
No
No
No
Yes
Yes
No
No
No
No
Yes
No
No
No
No
No
Yes
(A7-0)
No
No
Yes
Yes
Yes
(A7-0)
No
No
No
No
Yes
(A7-0)
or
(A15-8)
No
No
No
No
Port A
Yes
Port B
Yes
Port C
Yes
Port D
Yes
Port E
Yes
Port F
Yes
Port G
Yes
Address In
Data Port
Peripheral I/O
JTAG ISP
Yes
No
No
No
Yes
No
No
No
Yes
No
No
No
Yes
No
No
No
No
No
No
Yes*
Yes
Yes
Yes
No
*
Can be multiplexed with other I/O functions.
54

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