ST92195B STMicroelectronics, ST92195B Datasheet - Page 10

• Manufacturer Part Number: ST92195B
• Description: 32-64k Rom Hcmos Mcu With On-screen-display And Teletext Data Slicer
• Manufacturer: STMicroelectronics

ST92195B - GENERAL DESCRIPTION
1.2.2 I/O Port Styles
Legend:
AF= Alternate Function, BID = Bidirectional, OD = Open Drain
PP = Push-Pull, TTL = TTL Standard Input Levels
How to Read this Table
To configure the I/O ports, use the information in
this table and the Port Bit Configuration Table in
the I/O Ports Chapter of the datasheet.
Port Style= the hardware characteristics fixed for
each port line.
Inputs:
– If port style = Standard I/O, either TTL or CMOS
– If port style = Schmitt trigger, selecting CMOS or
Weak Pull-Up = This column indicates if a weak
pull-up is present or not.
10/22
P4.5
P4.6
P4.7
P5.0
P5.1
P0[7:0]
P2[5,4,3,2]
P2[1,0]
P3.7
P3[6,5,4]
P4[7:0]
P5[1:0]
input level can be selected by software.
TTL input by software has no effect, the input will
always be Schmitt Trigger.
Name
Port
Pins
All ports useable
for general pur-
pose I/O (input,
output or bidi-
rectional)
Purpose I/O
General
Weak Pull-Up
yes
no
no
no
no
no
no
TQFP64 SDIP56
45
46
47
14
13
Pin No.
Schmitt trigger
Standard I/O
Standard I/O
Standard I/O
Standard I/O
Standard I/O
Standard I/O
Port Style
47
48
49
20
19
PWM5
PWM6
EXTRG
PWM7
STOUT
INT2
SCK
SDO
SDI
– If WPU = yes, then the WPU can be enabled/dis-
– If WPU = no, then enabling the WPU by software
Alternate Functions (AF) = More than one AF
cannot be assigned to an external pin at the same
time:
An alternate function can be selected as follows.
AF Inputs:
– AF is selected implicitly by enabling the corre-
BID / OD / TTL
BID / OD / TTL
BID / OD / TTL
BID / OD / TTL
BID / OD / TTL
BID / OD / TTL
Reset Values
AF / PP / TTL
able by software
has no effect
sponding peripheral. Exception to this are ADC
analog inputs which must be explicitly selected
as AF by software.
O
O
O
O
O
O
I
I
I
PWM Output 5
PWM Output 6
A/D Converter External Trigger Input
PWM Output 7
Standard Timer Output
External Interrupt 2
SPI Serial Clock
SPI Serial Data Out
SPI Serial Data In
Alternate Functions