ST62T28CM6 View Datasheet(PDF) - STMicroelectronics

Part Name

Description

Manufacturer

ST62T28CM6

8-BIT MCUs WITH A/D CONVERTER, AUTO-RELOAD TIMER, UART, OSG, SAFE RESET AND 28-PIN PACKAGE

STMicroelectronics 

ST62T28C/E28C

INTERRUPTS (Cont’d)

Interrupt Polarity Register (IPR)

Address: DAh — Read/Write

7

generates interrupt on rising edge. At reset, IPR is

cleared and all port interrupts are not inverted (e.g.

Port C generates interrupts on falling edges).

0

Bit 7 - Bit 4 = Unused.

-

-

-

- PortD PortC PortA PortB Bit 3 = Port D Interrupt Polarity.

In conjunction with I/O register ESB bit, the polarity

of I/O pins triggered interrupts can be selected by

setting accordingly the Interrupt Polarity Register

(IPR). If a bit in IPR is set to one the corresponding

port interrupt is inverted (e.g. IPR bit 2 = A; port C

Bit 2 = Port C Interrupt Polarity.

Bit 1= Port A Interrupt Polarity.

Bit 0 = Port B Interrupt Polarity.

Tables 11. I/O Interrupts selections according to IPR, IOR programming

GEN

1

1

1

1

1

1

1

1

0

IPR3

0

0

0

0

1

1

1

1

X

IPR0

0

0

1

1

0

0

1

1

X

IOR5

0

1

0

1

0

1

0

1

X

Port B occurrence

falling edge

rising edge

rising edge

falling edge

falling edge

rising edge

rising edge

falling edge

Disabled

Port D occurrence

falling edge

rising edge

falling edge

rising edge

rising edge

falling edge

rising edge

falling edge

Disabled

Interrupt

source

2

GEN

1

1

1

1

0

IPR1

0

0

1

1

X

IOR6

0

1

0

1

X

Port A occurrence

falling edge

low level

rising edge

high level

Disabled

Interrupt

source

1

IPR2

0

1

Port C occurrence

falling edge

rising edge

Interrupt source

0

30/84

30

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