ST72321B STMICROELECTRONICS [STMicroelectronics], ST72321B Datasheet - Page 13

• Manufacturer Part Number: ST72321B
• Description: 64/44-pin 8-bit MCU with 32 to 60K Flash/ROM, ADC, five timers, SPI, SCI, I2C interface
• Manufacturer: STMICROELECTRONICS [STMicroelectronics]

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 46. and
ISTICS
3. OSC1 and OSC2 pins connect a crystal/ceramic resonator, or an external source to the on-chip oscil-
lator; see
more details.
4. On the chip, each I/O port may have up to 8 pads:
– Pads that are not bonded to external pins are forced by hardware in input pull-up configuration after re-
5.
6.
pins to ground.
48 33
49 34 17 PA4 (HS)
50 35
51 36 18 PA6 (HS)/SDAI
52 37 19 PA7 (HS)/SCLI
53 38 20 V
54 39 21 RESET
55
56
57 40 22 V
58 41 23 OSC2
59 42 24 OSC1
60 43 25 V
61 44 26 PE0/TDO
62
63
64
set. The configuration of these pads must be kept at reset state to avoid added current consumption.
Pin n°
Pull-up always activated on PE2 see limitation
It is mandatory to connect all available V
1
-
-
-
-
for more details.
27 PE1/RDI
-
-
-
-
-
-
Section 1 DESCRIPTION
V
PA5 (HS)
EVD
TLI
PE2
PE3
SS_1
PP
SS_2
DD_2
/ ICCSEL
Pin Name
3)
3)
I/O C
I/O C
I/O C
I/O C
I/O C
I/O C
I/O
I/O C
I/O C
I/O C
S
S
S
I
I
I
and
C
Level
T
T
T
T
T
T
T
T
T
T
Section 12.5 CLOCK AND TIMING CHARACTERISTICS
HS
HS
HS
HS
DD
X
X
X
X
X
X
X
and V
X
X
X
X
X
X
Section
Input
REF
X
Port
pins to the supply voltage and all V
15.1.8.
Section 12.8 I/O PORT PIN CHARACTER-
X
Output
X
X
T
T
X
X
X
5)
X
X
X
X
X
X
5)
function
External voltage detector
Digital Ground Voltage
Port A4
Port A5
Port A6
Port A7
Must be tied low. In flash program-
ming mode, this pin acts as the pro-
gramming voltage input V
Section 12.9.2
voltage must not be applied to ROM
devices
Top priority non maskable interrupt.
Top level interrupt input pin
Digital Ground Voltage
Resonator oscillator inverter output
External clock input or Resonator os-
cillator inverter input
Digital Main Supply Voltage
Port E0
Port E1
Port E2
Port E3
reset)
(after
Main
SCI Transmit Data Out
SCI Receive Data In
I
I
2
2
C Data
C Clock
Alternate function
for more details. High
1)
1)
SS
PP
and V
. See
13/187
SSA
DD
for