ST72321R6 STMicroelectronics, ST72321R6 Datasheet - Page 47

• Manufacturer Part Number: ST72321R6
• Description: 8-BIT MCU WITH NESTED INTERRUPTS, FLASH,10-BIT ADC, FIVE TIMERS, SPI, SCI, I2C INTERFACE
• Manufacturer: STMicroelectronics

Specifications of ST72321R6

• Hdflash Endurance: 100 cycles, data retention
• Clock Sources: crystal/ceramic resonator oscillators, internal RC oscillator, clock security system and bypass for external clock
• Four Power Saving Modes: Halt, Active-Halt,Wait and Slow
• Main Clock Controller With: Real time base, Beep and Clock-out capabilities
• Two 16-bit Timers With: 2 input captures, 2 output compares, external clock input on one timer, PWM and pulse generator modes
• 8-bit Pwm Auto-reload Timer With: 2 input captures, 4 PWM outputs, output compare and time base interrupt, external clock with event detector

I/O PORTS (Cont’d)
Figure 30. I/O Port General Block Diagram
Table 10. I/O Port Mode Options
Legend: NI - not implemented
Input
Output
REGISTER
ACCESS
SOURCE (ei
EXTERNAL
INTERRUPT
DDR SEL
Off - implemented not activated
On - implemented and activated
OR SEL
DR SEL
Floating with/without Interrupt
Pull-up with/without Interrupt
Push-pull
Open Drain (logic level)
True Open Drain
DDR
Configuration Mode
DR
OR
x
)
ALTERNATE
OUTPUT
ALTERNATE
ENABLE
If implemented
1
0
1
0
Pull-Up
Off
On
Off
NI
Note: The diode to V
true open drain pads. A local protection between
the pad and V
vice against positive stress.
N-BUFFER
ST72321Rx ST72321ARx ST72321Jx
PULL-UP
CONDITION
P-Buffer
Off
On
Off
NI
SS
SCHMITT
TRIGGER
CMOS
is implemented to protect the de-
V
DD
DD
NI (see note)
to V
is not implemented in the
On
DD
P-BUFFER
(see table below)
V
Diodes
DD
DIODES
(see table below)
PULL-UP
(see table below)
ALTERNATE
ANALOG
INPUT
to V
INPUT
PAD
On
SS
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