ST72521 STMICROELECTRONICS [STMicroelectronics], ST72521 Datasheet - Page 12

• Manufacturer Part Number: ST72521
• Description: 8-BIT MCU WITH NESTED INTERRUPTS, FLASH, 10-BIT ADC, FIVE TIMERS, SPI, SCI, I2C, CAN INTERFACE
• Manufacturer: STMICROELECTRONICS [STMicroelectronics]

ST72521
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,
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52
53 41 PC6/SCK/ICCCLK
54 42 PC7/SS/AIN15
55 43 PA0
56 44 PA1
57 45 PA2
58 46 PA3 (HS)
59 47 V
60 48 V
61 49 PA4 (HS)
62 50 PA5 (HS)
63 51 PA6 (HS)/SDAI
64 52 PA7 (HS)/SCLI
65 53 V
66 54 RESET
67 55 EVD
68 56 TLI
69
70
71
72
73 57 V
74 58 OSC2
75 59 OSC1
76 60 V
77 61 PE0/TDO
78 62 PE1/RDI
79 63 PE2/CANTX
80 64 PE3/CANRX
Pin n°
-
-
-
-
-
PH3
PH4
PH5
PH6
PH7
DD_1
SS_1
PP
SS_2
DD_2
/ ICCSEL
3)
3)
Pin Name
I/O T
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 T
I/O T
I/O T
I/O T
I/O
I/O C
I/O C
I/O C
I/O C
S
S
S
S
I
I
I
C
T
T
T
T
T
Level
T
T
T
T
T
T
T
T
T
T
T
T
T
T
T
T
HS
HS
HS
HS
HS
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
Input
ei0
ei0
ei0
ei0
X
Port
X
Output
X
X
X
X
X
X
X
X
X
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
function
Port H3
Port C6
Port C7
Port A0
Port A1
Port A2
Port A3
Digital Main Supply Voltage
Digital Ground Voltage
Port A4
Port A5
Port A6
Port A7
Must be tied low. In flash programming
mode, this pin acts as the programming
voltage input V
for more details. High voltage must not
be applied to ROM devices
Top priority non maskable interrupt.
External voltage detector
Top level interrupt input pin
Port H4
Port H5
Port H6
Port H7
Digital Ground Voltage
Resonator oscillator inverter output
External clock input or Resonator oscil-
lator inverter input
Digital Main Supply Voltage
Port E0
Port E1
Port E2
Port E3
reset)
(after
Main
SPI Serial
Clock
SPI Slave
Select (active
low)
SCI Transmit Data Out
SCI Receive Data In
CAN Transmit Data Output
CAN Receive Data Input
I
I
2
2
C Data
C Clock
Alternate function
PP
. See
1)
1)
Section 12.9.2
ICC Clock
Output
ADC Analog
Input 15