PSD954F3V-A-90U View Datasheet(PDF) - STMicroelectronics
Part Name
Description
Manufacturer
PSD954F3V-A-90U Datasheet PDF : 94 Pages
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Preliminary Information
PSD9XX Family
Table 5.
PSD9XX
Pin
Descriptions
(cont.)
Pin Name Pin* Type
(PLCC)
Description
CNTL2
49 I This pin can be used to input the PSEN (Program Select
Enable) signal from any MCU that uses this signal for code
exclusively. If your MCU does not output a Program Select
Enable signal, this port can be used as a generic input. This
port is connected to the PLDs.
Reset
48 I Active low reset input. Resets I/O Ports and some of the
configuration registers. Must be active at power up.
PA0
29 I/O These pins make up Port A. These port pins are configurable
PA1
28
and can have the following functions:
PA2
27
PA3
25
PA4
24
PA5
23
PA6
22
PA7
21
1. MCU I/O — write to or read from a standard output or
input port.
2. General Purpose PLD outputs.
3. Inputs to the PLDs.
4. Latched address outputs (see Table 6).
5. Address inputs. For example, PA0-3 could be used for
A[0:3] when using an 80C51XA in burst mode.
6. As the data bus inputs D[0:7] for non-multiplexed
address/data bus MCUs.
7. D0/A16-D3/A19 in M37702M2 mode.
Note: PA0-3 can only output CMOS signals with an option
for high slew rate. However, PA4-7 can be configured as
CMOS or Open Drain Outputs.
PB0
7 I/O These pins make up Port B. These port pins are configurable
PB1
6
and can have the following functions:
PB2
5
PB3
4
PB4
3
PB5
2
PB6
52
PB7
51
1. MCU I/O — write to or read from a standard output or
input port.
2. General Purpose PLD outputs.
3. Inputs to the PLDs.
4. Latched address outputs (see Table 6).
Note: PB0-3 can only output CMOS signals with an option
for high slew rate. However, PB4-7 can be configured as
CMOS or Open Drain Outputs.
PC0
20 I/O PC0 pin of Port C. This port pin can be configured to have
the following functions:
1. MCU I/O — write to or read from a standard output or
input port.
2. Input to the PLDs.
3. TMS Input for the JTAG Interface.
This pin can be configured as a CMOS or Open Drain output.
PC1
19 I/O PC1 pin of Port C. This port pin can be configured to have
the following functions:
1. MCU I/O — write to or read from a standard output or
input port.
2. Input to the PLDs.
3. TCK Input for the JTAG Interface.
This pin can be configured as a CMOS or Open Drain output.
11
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