ST72T311 ST Microelectronics, ST72T311 Datasheet - Page 28

• Manufacturer Part Number: ST72T311
• Description: 8-BIT MCU WITH 8 TO 16K OTP/EPROM
• Manufacturer: ST Microelectronics

ST72E311 ST72T311
I/O PORTS (Cont’d)
Figure 21
Table 10. Port Mode Configuration
28/100
Legend:
0 -
1 -
Floating
Pull-up
Push-pull
True Open Drain
Open Drain (logic level)
EXTERNAL
INTERRUPT
SOURCE (EIx)
ALTERNATE INPUT
present, not activated
present and activated
28
.
I/O Block Diagram
Configuratio n Mode
POLARITY
(S
SEL
EE
DR SEL
DDR SEL
OR SEL
T
DDR
LATCH
LATCH
ABLE BELOW
LATCH
OR
DR
ALTERNATE
OUTPUT
FROM
OTHER
BITS
M
U
X
)
1
0
ALTERNATE ENABLE
1
0
M
U
X
ALTERNATE
ENABLE
ALTERNATE
ENABLE
– No OR Register on some ports (see register map).
– ADC Switch on ports with analog alternate functions.
SCHMITT TRIGGER
not present
Notes:
ANALOG ENABLE
(ADC)
PULL-UP
CONDITIO N
Pull-up
CMOS
0
1
0
0
(S
EE
N
OTE BELOW
ANALOG
SWITCH
not present
P-buffer
PULL-UP
0
0
1
0
)
GND
N-BUFFER
V
(S
P-BUFFER
GND
DD
EE
(S
V
D
T
DD
IODE
EE
ABLE
not present
V
T
DD
ABLE BELOW
B
PAD
ELOW
Diode
1
1
1
1
)
)