ZPSD313V-B-20UI View Datasheet(PDF) - STMicroelectronics
Part Name
Description
Manufacturer
ZPSD313V-B-20UI Datasheet PDF : 85 Pages
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PSD3XX Family
10.
I/O Port
Functions
(cont.)
10.4 Port C (PC0-PC2)
Each pin of Port C (Figure 7) can be configured as an input to PAD A and PAD B, or as an
output from PAD B. As inputs, the pins are referenced as A16-A18. Although the pins are
given this reference, they can be used for any address or logic input. [For example, A8-A10
could be connected to those pins to improve the resolution (boundaries) of CS0-CS7 to 256
bytes.] How they are defined in the PSDsoft design file determines:
• Whether they are address or logic inputs
• Whether the input is transparent or latched by the trailing edge of ALE/AS.
Notes:
1) If the inputs are addresses, they are routed to PAD A and PAD B, and can be used in
any or all PAD equations.
2) A logic input is routed to PAD B and can be used for Boolean equations that are
implemented in any or all of the CS0-CS10 PAD B outputs.
Alternately, PC0-PC2 can become CS8-CS10 outputs, respectively, providing the user with
t(s) more external chip-select PAD outputs. Each of the signals (CS8-CS10) is comprised of
one product term.
duc Figure 7. Port C (PC0-PC2) Pin Structure
lete Pro uct(s) From PAD
- Obso te Prod A16/A17/A18
uct(s) Obsole To PAD
CS8 / CS9 / C S10
Latched Address
Input
QD
En
Logic Input
Address In or
Chip Select Out
D
E
M
ALE
U
X
Port C I/O1
(PC0 / P C1/PC2)
Input or Output
Set by PSDsoft 2
PSDsoft 2
Prod t(s) - NOTES: 1. Port C pins can be individually configured as inputs or outputs, but not both. Pins can be individually
te c configured as address or logic and latched or transparent, except for the 3X1 devices, which must be
le u set to all address or all logic.
d 2. PSDsoft sets this configuration prior to run-time based on your PSDsoft design file.
bso Pro 10.5 ALE/AS Input Pin
O teThe ALE/AS pin may be used as a generic logic input signal to the PADs if a
Obsole non-multiplexed MCU configuration is chosen in PSDsoft.
20
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