Datasheet

12 - PARALLEL PORTS ST10F269
72/184
(pins P3.15, P3.14 and P3.12 do not support open
drain mode).
Due to pin limitations register bit P3.14 is not
connected to an output pin.
P3 (FFC4h / E2h) SFR Reset Value: 0000h
DP3 (FFC6h / E3h) SFR Reset Value: 0000h
ODP3 (F1C6h / E3h) ESFR Reset Value: 0000h
1514131211109876543210
P3.15 - P3.13 P3.12 P3.11 P3.10 P3.9 P3.8 P3.7 P3.6 P3.5 P3.4 P3.3 P3.2 P3.1 P3.0
RW RW RW RW RW RW RW RW RW RW RW RW RW RW RW RW
P3.y Port Data Register P3 Bit y
1514131211109876543210
DP3
.15
-DP3
.13
DP3
.12
DP3
.11
DP3
.10
DP3
.9
DP3
.8
DP3
.7
DP3
.6
DP3
.5
DP3
.4
DP3
.3
DP3
.2
DP3
.1
DP3
.0
RW RW RW RW RW RW RW RW RW RW RW RW RW RW RW RW
DP3.y Port Direction Register DP3 Bit y
DP3.y = 0: Port line P3.y is an input (high-impedance)
DP3.y = 1: Port line P3.y is an output
1514131211109876543210
--ODP3
.13
-ODP3
.11
ODP3
.10
ODP3
.9
ODP3
.8
ODP3
.7
ODP3
.6
ODP3
.5
ODP3
.4
ODP3
.3
ODP3
.2
ODP3
.1
ODP3
.0
RW RW RW RW RW RW RW RW RW RW RW RW RW RW RW RW
ODP3.y Port 3 Open Drain Control Register Bit y
ODP3.y = 0: Port line P3.y output driver in push-pull mode
ODP3.y = 1: Port line P3.y output driver in open drain mode