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ST62E28C Datenblatt(PDF) 6 Page - STMicroelectronics

Teilenummer ST62E28C
Bauteilbeschribung  8-BIT MCUs WITH A/D CONVERTER, AUTO-RELOAD TIMER, UART, OSG, SAFE RESET AND 28-PIN PACKAGE
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Hersteller  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

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ST62T28C/E28C
1.2 PIN DESCRIPTIONS
VDD and VSS. Power is supplied to the MCU via
these two pins. VDD is the power connection and
VSS is the ground connection.
OSCin and OSCout. These pins are internally
connected to the on-chip oscillator circuit. A quartz
crystal, a ceramic resonator or an external clock
signal can be connected between these two pins.
The OSCin pin is the input pin, the OSCout pin is
the output pin.
RESET. The active-low RESET pin is used to re-
start the microcontroller.
TEST/V
PP. The TEST must be held at VSS for nor-
mal operation. If TEST pin is connected to a
+12.5V level during the reset phase, the EPROM/
OTP programming Mode is entered.
NMI. The NMI pin provides the capability for asyn-
chronous interruption, by applying an external non
maskable interrupt to the MCU. The NMI input is
falling edge sensitive with Schmitt trigger charac-
teristics. The user can select as option the availa-
bility of an on-chip pull-up at this pin.
PA0-PA5. These 6 lines are organised as one I/O
port (A). Each line may be configured under soft-
ware control as inputs with or without internal pull-
up resistors, input with interrupt generation and
pull-up resistor, open-drain or push-pull outputs.
PA2/ARTIMout and PA3/ARTIMin can be used re-
spectively as output and input pins for the embed-
ded 8-bit Auto-Reload Timer.
In addition, PA0-PA5 can sink 20mA for direct LED
or TRIAC drive.
PB4...PB6. These 3 lines are organised as one I/O
port (B). Each line may be configured under soft-
ware control as inputs with or without internal pull-
up resistors, input with interrupt generation and
pull-up resistor, open-drain or push-pull outputs,
analog inputs for the A/D converter.
PC4-PC7. These 4 lines are organised as one I/O
port (C). Each line may be configured under soft-
ware control as input with or without internal pull-
up resistor, input with interrupt generation and
pull-up resistor, open-drain or push-pull output.
PC4 and PC5 can also be used as analog input for
the A/D converter, while PC6 and PC7 can sink
20mA for direct LED or TRIAC drive.
PD1...PD7. These 7 lines are organised as one I/O
port (portD). Each line may be configured under
software control as input with or without internal
pull-up resistor, input with interrupt generation and
pull-up resistor, analog input open-drain or push-
pull output. In addition, the pins PD5/TXD1 and
PD4/RXD1 can be used as UART output (PD5/
TXD1) or UART input (PD4/RXD1). The pins PD3/
Sout, PD2/Sin and PD3/Scl can also be used re-
spectively as data out, data in and clock pins for
the on-chip SPI.
TIMER. This is the TIMER 1 I/O pin. In input mode,
it is connected to the prescaler and acts as ex-
ternal timer clock or as control gate for the internal
timer clock. In output mode, the TIMER pin outputs
the data bit when a time-out occurs.The user can
select as option the availability of an on-chip pull-
up at this pin.
Figure 2. ST62T28C/E28C Pin Configuration
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
VDD
TIMER
OSCin
OSCout
NMI
TEST/VPP
(1)
RESET
PC7*
PC6*
Ain/PC5
VSS
PA0*
PA1*
PA2*/ARTIMout
PA3*/ARTIMin
PD3/Ain/Sout
PD4/Ain/RXD1
PD5/Ain/TXD1
PD6/Ain
PD7/Ain
28
27
26
25
24
23
22
21
Ain/PC4
Ain/PB6
Ain/PB5
Ain/PB4
PA4*
PA5*
PD1/Ain/Scl
PD2/Ain/Sin
(1) V
PP
on EPROM/OTP only
VR01804B
(*) 20 mA Sink
6


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