st52t430 STMicroelectronics, st52t430 Datasheet - Page 12

• Manufacturer Part Number: st52t430
• Description: 8-bit Intelligent Controller Unit Icu Three Timer/pwms, Adc, Sci
• Manufacturer: STMicroelectronics

1.3 Pin Description
V
noise disturbances, the power supply of the digital
part is kept separate from the power supply of the
analog part.
V
V
V
Converter.
GNDA. Analog V
Converter. Must be tied to V
V
(12.5V 5%, in programming phase) and MODE
s e l e c t o r . D u r i n g t h e P r o g r a m m in g p h a s e
(programming), V
Working phase V
OSCin and OSCout. These pins are internally
connected with the on-chip oscillator circuit. A
quartz crystal or a ceramic resonator can be
connected between these two pins in order to allow
the correct operations of ST52x430 with various
stability/cost trade-off. An external clock signal can
be applied to OSCin, in this case OSCout must be
floating.
RESET. This signal is used to restart ST52x430 at
the beginning of its program. It also allows one to
select the program mode for EPROM.
Ain0-Ain8. These 8 lines are connected to the
input of the analog multiplexer. They allow the
12/88
DD
DD.
SS
PP
DDA
. Digital circuit ground.
, V
. Main Power Supply for internal EPROM
Main Power Supply Voltage (5V 10%).
. An alog V
SS
, V
DDA
, GNDA, V
PP
DD
PP
SS
must be equal to V
must be set at 12V. In the
o f the Ana lo g to Digital
of the Analog to Digital
PP
SS .
. In order to avoid
SS
.
a c q u i s it i o n o f 8 a n a lo g i n p u t . D u r i n g t h e
Programming phase, Ain0, Ain1, Ain2 and Ain3 are
used to manage EPROM operation.
PA0-PA7, PB0-PB7, PC0-PC7. These lines are
organized as I/O port. Each pin can be configured
as input or output. PA7/PB7 are tied to the same
output. During Programming phase PA port is used
for EPROM read/write data.
T0RES, T0CLK, T0STRT. These pins are related
with the internal Programmable Timer/PWM 0.
This Timer can be reset externally by using
T0RES. In Working Mode, T0RES resets the
address counter of the Timer. T0RES is active at
low level.
The Timer 0 Clock can be the internal clock or can
be supplied externally by using pin T0CLK.
An external Start/Stop signal can be used to
control the Timer through T0STRT pin.
T0OUT, T1OUT, T2OUT. The TIMER/PWM
T0OUT, T1OUT, T2OUT. The TIMER/PWM
complementary outputs are available on these
pins.
Tx. Serial data output of SCI transmitter block
Rx. Serial data input of the SCI receiver block.
TEST. During the Programming and Working
phase it must be set to Vss.
outputs are available on these pins.