st62t65b STMicroelectronics, st62t65b Datasheet - Page 6

• Manufacturer Part Number: st62t65b
• Description: 8-bit Otp/eprom Mcus With A/d Converter, Auto-reload Timer, Eeprom And Spi
• Manufacturer: STMicroelectronics

ST62T55B ST62T65B/E65B
1.2 PIN DESCRIPTIONS
V
these two pins. V
V
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
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.It is provided with an on-chip
pullup resistor and Schmitt trigger characteristics.
PA0-PA7. These 8 lines are organized as one I/O
port (A). Each line may be configured under soft-
ware control as inputs with or without internal pull-
up resistors, interrupt generating inputs with pull-
up resistors, open-drain or push-pull outputs, ana-
log inputs for the A/D converter.
PB0-PB5. These 6 lines are organized as one I/O
port (B). Each line may be configured under soft-
ware control as inputs with or without internal pull-
up resistors, interrupt generating inputs with pull-
up resistors, open-drain or push-pull outputs.
PB0-PB5 can also sink 20mA for direct LED
driving.
PB6/ARTIMin, PB7/ARTIMout . These pins are ei-
ther Port B I/O bits or the Input and Output pins of
the AR TIMER. To be used as timer input function
6/74
6
DD
SS
is the ground connection.
and V
PP
. The TEST must be held at V
SS
. Power is supplied to the MCU via
DD
is the power connection and
SS
for nor-
PB6 has to be programmed as input with or with-
out pull-up. A dedicated bit in the AR TIMER Mode
Control Register sets PB7 as timer output function.
PB6-PB7 can also sink 20mA for direct LED driv-
ing.
PC0-PC4. These 5 lines are organized as one I/O
port (C). Each line may be configured under soft-
ware control as input with or without internal pull-
up resistor, interrupt generating input with pull-up
resistor, analog input for the A/D converter, open-
drain or push-pull output.
PC1 can also be used as Timer I/O bit while
PC2-PC4 can also be used as respectively Data
in, Data out and Clock I/O pins for the on-chip SPI
to carry the synchronous serial I/O signals.
Figure 2. ST62T55B, T65B, E65B Pin
ARTIMout/PB7
ARTIMin/PB6
V
Ain / PA0
PP
Ain/PA1
Ain/PA2
/TEST
Configuration
PB0
PB1
PB2
PB3
PB4
PB5
V
V
DD
SS
1
2
3
4
5
6
7
8
9
10
11
12
13
14
28
27
26
25
24
23
22
21
20
19
18
17
16
15
PC0/Ain
PC1/TIM1/Ain
PC2/Sin/Ain
PC3/Sout/Ain
PC4/Sck/Ain
NMI
RESET
OSCout
OSCin
PA7/Ain
PA6/Ain
PA5/Ain
PA4/Ain
PA3/Ain