ST62T32BQ6 STMicroelectronics, ST62T32BQ6 Datasheet - Page 36
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ST62T32BQ6
Manufacturer Part Number
ST62T32BQ6
Description
8-bit Microcontrollers - MCU OTP EPROM 8K SPI/UAR
Manufacturer
STMicroelectronics
Datasheet
1.ST62T32BQ6.pdf
(83 pages)
Specifications of ST62T32BQ6
Core
ST6
Data Bus Width
8 bit
Maximum Clock Frequency
8 MHz
Program Memory Size
7948 B
Data Ram Size
192 B
On-chip Adc
Yes
Package / Case
PQFP-52
Mounting Style
SMD/SMT
A/d Bit Size
8 bit
A/d Channels Available
21
Interface Type
SPI, UART
Maximum Operating Temperature
+ 85 C
Minimum Operating Temperature
- 40 C
Number Of Programmable I/os
30
Number Of Timers
2
Program Memory Type
EPROM
Factory Pack Quantity
84
Supply Voltage - Max
5 V
Supply Voltage - Min
4.5 V
ST62T32B ST62E32B
4 ON-CHIP PERIPHERALS
4.1 I/O PORTS
The MCU features Input/Output lines which may
be individually programmed as any of the following
input or output configurations:
– Input without pull-up or interrupt
– Input with pull-up and interrupt
– Input with pull-up, but without interrupt
– Analog input
– Push-pull output
– Open drain output
The lines are organised as bytewise Ports.
Each port is associated with 3 registers in Data
space. Each bit of these registers is associated
with a particular line (for instance, bits 0 of Port A
Data, Direction and Option registers are associat-
ed with the PA0 line of Port A).
The DATA registers (DRx), are used to read the
voltage level values of the lines which have been
configured as inputs, or to write the logic value of
the signal to be output on the lines configured as
outputs. The port data registers can be read to get
the effective logic levels of the pins, but they can
Figure 22. I/O Port Block Diagram
36/83
S
IN
REGISTER
S
CONTROLS
SHIFT
OUT
TO INTERRUPT
TO ADC
RESET
DIRECTION
REGISTER
REGISTER
REGISTER
OPTION
DATA
DATA
be also written by user software, in conjunction
with the related option registers, to select the dif-
ferent input mode options.
Single-bit operations on I/O registers are possible
but care is necessary because reading in input
mode is done from I/O pins while writing will direct-
ly affect the Port data register causing an unde-
sired change of the input configuration.
The Data Direction registers (DDRx) allow the
data direction (input or output) of each pin to be
set.
The Option registers (ORx) are used to select the
different port options available both in input and in
output mode.
All I/O registers can be read or written to just as
any other RAM location in Data space, so no extra
RAM cells are needed for port data storage and
manipulation. During MCU initialization, all I/O reg-
isters are cleared and the input mode with pull-ups
and no interrupt generation is selected for all the
pins, thus avoiding pin conflicts.
V
DD
V
DD
INPUT/OUTPUT
VA00413