FM8PC71AMAEP datasheet(33/73 Pages) FEELING

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FM8PC71AM

This datasheet contains new product information. Feeling Technology reserves the rights to modify the product specification without notice.

No liability is assumed as a result of the use of this product. No rights under any patent accompany the sales of the product.

P.33

R1.1.004, Aug 7, 2017

FM8PC71AM

遠翔科技

Feeling Technology

[C-N2S]

: Normal mode into Slow mode condition.

First, the firmware needs to switch CPU clock, the CPU clock will be from FIRC/FOSC to FSIRC.

Next, set LVDIS (Reg.12h.5) bit to 1

Example code:

BSR

CLKCFG, SELCLK2_B

// set Fsel = FSIRC (SELCLK=3’b101)

BCR

CLKCFG, SELCLK1_B

BSR

CLKCFG, SELCLK0_B

BSR

CLKCFG, CLKSW_B

// switch CPU clock

NOP

BSR

PCON, LVDIS_B

[C-S2N]

: Slow mode into normal mode condition.

When the firmware switches CPU clock from FSIRC to FIRC/FOSC and sets LVDIS (Reg.12h.5) bit to 0.

Example code:

BCR

PCON, LVDIS_B

BCR

CLKCFG, CLKSW_B

// switch CPU clock

[C-N2G]

: Normal mode into Green mode condition.

Green mode is sort into two types. Their difference is one disables all LVD36, LVD24, LVD20 and

internal high IRC, and another not.

Example code for enabling all low voltage detect and internal high IRC:

BSR

PCON,GREEN_MD_B

//set GREEN_MD bit to 1

NOP

Example code for disabling all low voltage detect and internal high IRC :

MOVIA

0b01100000

//set GREEN_MD and LVDIS bit to 1 at the same time

MOVAR PCON

NOP

[C-G2N]

: Green mode into normal mode condition.

(1) PA,PB wakeup interrupt.

(2) external Reset occurs.

(3) WDT time out wakeup. (PC=0000h or PC=PC+1)

(4) PWM timers time out interrupt using T0CK/T1CK.

[C-S2G]

: Slow mode into Green mode condition.

Slow mode only can be changed into the Green mode that disable all low voltage detect, because Slow

mode always disable low voltage detect. Set GREEN_MD (Reg.12h.6) bit to 1 and enter Green mode.

Example:

BSR

PCON, GREEN_MD_B

NOP

[C-G2S]

: Green mode into Slow mode condition.

(1)

PA,PB wakeup interrupt.

(2)

LVR or external Reset occurs.

(3)

WDT time out wakeup. (PC=0000h or PC=PC+1)

(4)

PWM timers time out interrupt using T0CK/T1CK.

FM8PC71AMAEP Datasheet(PDF) 33 Page - Feeling Technology Corp.

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