PSD853F4VA-15UT View Datasheet(PDF) - STMicroelectronics
Part Name
Description
Manufacturer
PSD853F4VA-15UT 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
t(s) 1
Output
uc Table 25. Port Pin Direction Control, Output Enable P.T. defined
rod Direction register Bit
Output Enable P.T.
Port Pin mode
P 0
0
Input
te 0
1
Output
ole 1
0
Output
s 1
1
Output
- Ob Table 26.
t(s) Bit 7
c 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
rodu Table 27.
P Drive
teregister
ole Port A
Obs Port B
Drive register pin assignment
Bit 7
Bit 6
Bit 5
Bit 4
Open
Drain
Open
Open
Drain
Open
Open
Drain
Open
Open
Drain
Open
Bit 3
Slew
Rate
Slew
Bit 2
Slew
Rate
Slew
Bit 1
Slew
Rate
Slew
Bit 0
Slew
Rate
Slew
Drain
Drain
Drain
Drain
Rate
Rate
Rate
Rate
Port C
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)
NA(1)
Slew
Rate
Slew
Rate
Slew
Rate
1. NA = Not Applicable.
Doc ID 7833 Rev 7
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