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PSD413A2 Datasheet(PDF) 78 Page - STMicroelectronics

Part # PSD413A2
Description  Low Cost Field Programmable Microcontroller Peripherals
PDF  123 Pages
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

PSD413A2 Datasheet(HTML) 78 Page - STMicroelectronics

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PSD4XX Family
75
PSD4XX Family
System
Configuration
(cont.)
Register Name
Register Function
Data In
This Register is used to read the inputs on the port pins.
Control
A
“0” sets the corresponding port pin in Address Out Mode.
A
“1” sets the pin in MCU I/O Mode.
Data Out
Holds the output data in the MCU I/O Mode.
This register is used to control the data flow in the I/O ports.
Direction
A
“0” sets the corresponding pin as an input pin.
A
“1” sets the pin as an output pin.
Open Drain
A
“0” sets the corresponding pin driver as a CMOS driver.
A
“1” sets the pin driver as an Open Drain Driver.
PLD – I/O
A read only status register; a
“1” indicates the corresponding pin
is configured as a PLD pin.
Macrocell Out
This register holds the outputs of the GPLD macrocells.
Page Register
A 4-bit register that supports paging.
1. Configures the PSD4XX SRAM to be accessed by
“PSEN” as
VM
program space (8031 design).
2. Enables the Peripheral I/O Mode of Port A.
PMMR0
Power management registers; enables the PSD4XX Power Down
PMMR1
Mode and other power saving configurations.
Table 23. Register Function



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