PSD854F3A-15UI View Datasheet(PDF) - STMicroelectronics
Part Name
Description
Manufacturer
PSD854F3A-15UI Datasheet PDF : 128 Pages
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PSD8XXFX
I/O ports
Table 23. Port configuration registers (PCR)t
Register name
Port
Control
A,B
Direction
Drive Select(1)
A,B,C,D
A,B,C,D
1. See Table 27 for Drive register bit definition.
MCU access
WRITE/READ
WRITE/READ
WRITE/READ
Table 24.
Port Pin Direction Control, Output Enable P.T. not defined
Direction register bit
Port Pin mode
0
Input
1
Output
Table 25. Port Pin Direction Control, Output Enable P.T. defined
Direction register Bit
Output Enable P.T.
Port Pin mode
0
0
Input
0
1
Output
1
0
Output
1
1
Output
Table 26.
Bit 7
0
Port Direction assignment example
Bit 6
Bit 5
Bit 4
Bit 3
0
0
0
0
Bit 2
1
Bit 1
1
Bit 0
1
Table 27.
Drive
register
Port A
Port B
Port C
Drive register pin assignment
Bit 7
Bit 6
Bit 5
Bit 4
Open
Drain
Open
Drain
Open
Drain
Open
Drain
Open
Drain
Open
Drain
Open
Drain
Open
Drain
Open
Drain
Open
Drain
Open
Drain
Open
Drain
Port D
NA(1)
NA(1)
NA(1)
NA(1)
1. NA = Not Applicable.
Bit 3
Slew
Rate
Slew
Rate
Open
Drain
NA(1)
Bit 2
Slew
Rate
Slew
Rate
Open
Drain
Slew
Rate
Bit 1
Slew
Rate
Slew
Rate
Open
Drain
Slew
Rate
Bit 0
Slew
Rate
Slew
Rate
Open
Drain
Slew
Rate
Doc ID 7833 Rev 7
73/128
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