STC12LE5616AD datasheet(138/377 Pages) STC

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9. Interrupt register related with Power down wake-up: WAKE_CLKO (Non bit-Addressable)

SFR name

Address bit

WAKE_CLKO

8FH name PCAWAKEUP RXD_PIN_IE T1_PIN_IE T0_PIN_IE

T1CKLO T0CKLO

PCAWAKEUP: When set and the associated-PCA interrupt control registers is configured correctly, the CEXn pin

of PCA function is enabled to wake up MCU from power-down state.

RXD_PIN_IE: When set and the associated-UART interrupt control registers is configured correctly, the RXD

pin (P3.0) is enabled to wake up MCU from power-down state.

T1_PIN_IE :

When set and the associated-Timer1 interrupt control registers is configured correctly, the T1 pin

(P3.5) is enabled to wake up MCU from power-down state.

T0_PIN_IE :

When set and the associated-Timer0 interrupt control registers is configured correctly, the T1 pin

(P3.4) is enabled to wake up MCU from power-down state.

T1CKLO :

When set, P3.5 is enabled to be the clock output of Timer 1. The clock rate is Timer 1overflow rate

divided by 2.

T0CKLO :

When set, P3.4 is enabled to be the clock output of Timer 0. The clock rate is Timer 0overflow rate

divided by 2.

8. Register related with SPI interrupt : SPSTAT

SPI State register: SPSTAT (Non bit-addressable)

SFR name Address

bit

SPSTAT

CDH

name

SPIF

WCOL

------

SPIF :

SPI transfer completion flag.

When a serial transfer finishes, the SPIF bit is set and an interrupt is generated if all the EADC_SPI (IE.6)

bit, ESPI bit (AUXR.3) and the EA (IE.7) bit are set. If SS is an input and is driven low when SPI is in

master mode with SSIG = 0, SPIF will also be set to signal the “mode change”.The SPIF is cleared in

software by “writing 1 to this bit”.

WCOL: SPI write collision flag.

The WCOL bit is set if the SPI data register, SPDAT, is written during a data transfer. The WCOL flag is

cleared in software by “writing 1 to this bit”.

IE: Interrupt Enable Rsgister (Bit-addressable)

SFR name Address

bit

A8H

name

EPCA_LVD EADC_SPI

ET1

EX1

ET0

EX0

EA : disables all interrupts.

If EA = 0,no interrupt will be acknowledged.

If EA = 1, each interrupt source is individually enabled or disabled by setting or clearing its enable bit.

EADC_SPI : Interrupt controller of Serial Peripheral Interface (SPI) and A/D Converter (ADC).

If EADC_SPI = 0, Disable the interrupt of Serial Peripheral Interface (SPI) and A/D Converter (ADC).

If EADC_SPI = 1, Enable the interrupt of Serial Peripheral Interface (SPI) and A/D Converter (ADC).

138

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