ST72F321J ST Microelectronics, ST72F321J Datasheet - Page 10

• Manufacturer Part Number: ST72F321J
• Description: 8-BIT MCU
• Manufacturer: ST Microelectronics

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DataSheet
ST72321J
Notes:
1. In the interrupt input column, “eiX” defines the associated external interrupt vector. If the weak pull-up
column (wpu) is merged with the interrupt column (int), then the I/O configuration is pull-up interrupt input,
else the configuration is floating interrupt input.
2. In the open drain output column, “T” defines a true open drain I/O (P-Buffer and protection diode to V
are not implemented). See See “I/O PORTS” on page 44. and
ISTICS
3. OSC1 and OSC2 pins connect a crystal/ceramic resonator, an RC oscillator, or an external source to
10/179
Pin
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
n°
1
2
3
4
5
4
PC4/MISO/ICCDA-
TA
PC5/MOSI/AIN14
PC6/SCK/ICCCLK
PC7/SS/AIN15
PA3 (HS)
V
V
PA4 (HS)
PA5 (HS)
PA6 (HS)/SDAI/
PA7 (HS)/SCLI
V
RESET
V
OSC2
OSC1
V
PE0/TDO
PE1/RDI
PB0/PWM3
PB1/PWM2
PB2/PWM1
PB3/PWM0
U
DD_1
SS_1
PP
SS_2
DD_2
for more details.
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/ICCSEL
Pin Name
I/O C
I/O C
I/O C
I/O C
I/O C
I/O C
I/O C
I/O C
I/O C
I/O C
I/O C
I/O C
I/O C
I/O C
I/O C
I/O C
O
S
S
S
S
I
I
Level
T
T
T
T
T
T
T
T
T
T
T
T
T
T
T
T
HS
HS
HS
HS
HS
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X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
Input
ei2
ei2
ei2
ei0
ei2
Port
X
X
Output
X
X
X
X
X
X
X
T
T
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
Section 12.8 I/O PORT PIN CHARACTER-
function
Port C4
Port C5
Port C6
Caution: During normal operation, this pin must
be pulled-up, internally or externally, to avoid
entering ICC mode unexpectedly during a reset.
Port C7
Port A3
Digital Main Supply Voltage
Digital Ground Voltage
Port A4
Port A5
Port A6
Port A7
Must be tied low. In the flash programming
mode, this pin acts as the programming voltage
input V
High voltage must not be applied to ROM devic-
es.
Top priority non maskable interrupt.
Digital Ground Voltage
Resonator oscillator inverter output or capacitor
input for RC oscillator
External clock input or Resonator oscillator in-
verter input or resistor input for RC oscillator
Digital Main Supply Voltage
Port E0
Port E1
Port B0
Port B1
Port B2
Port B3
reset)
(after
Main
PP
. See
SPI Master In /
Slave Out Data
SPI Master Out /
Slave In Data
SPI Serial Clock
SPI Slave Select
(active low)
SCI Transmit Data Out
SCI Receive Data In
PWM Output 3
PWM Output 2
PWM Output 1
PWM Output 0
I
I
2
2
C Data
C Clock
Section 12.9.2
Alternate Function
2)
2)
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ICC Data Input
ADC Analog
Input 14
ICC Clock Output
ADC Analog
Input 15
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