EKTF6708 datasheet(27/158 Pages) EMC

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eKTF6708

8-Bit Microcontroller

IC Product Specification (V1.2) 03.12.2020

 17

(This specification is subject to change without prior notice)

CPU mode switch

IRC

Frequency

POR/LVR

Waiting time before CPU starting to work

PERCS = 1

PERCS = 0

Green -> Normal

4M, 8M

16ms + WSTO + 8/32 clocks

(main frequency)

WSTO + (8/32) clocks@4M&8M

WSTO + 32 clocks@12M&16M

(main frequency)

12M, 16M

Idle -> Normal

4M, 8M, 12M,

16M

WSTO + 3 clocks

(sub frequency 32KHz)

Sleep -> Normal

WSTO + 6 clocks

(sub frequency 32KHz)

Idle -> Green

32KHz

16ms + WSTO + 3 clocks

(sub frequency)

WSTO + 3 clocks

(sub frequency 32KHz)

Sleep -> Green

WSTO + 6 clocks

(sub frequency 32KHz)

WSTO: Waiting time of Start-to-Oscillation

Bit 5 (PERCS): Periphery Clock Source for Green and Idle modes.

0: Periphery Clock Source is Fs. Fm will be Stop into Green and Idle modes.

(default)

1: Periphery Clock Source is Fm. Fm will be oscillation into Green and Idle

modes.

Bits 4,2: Not used, set to “0” all the time

Bit 3 (FMSF): Fm Stable Flag bit.

0: Indicate that the frequency is unstable.

1: Indicate that the frequency has stabilized.

Bits 1~0 (RCM1~RCM0): Internal RC mode selection bits

*Default value corresponding code option Word1 RCM1~RCM0

*RCM1

*RCM0

Frequency (MHz)

6.1.10 Bank 0 RF: EIESCR (External Interrupt Edge Select Control

Bit 7

Bit 6

Bit 5

Bit 4

Bit 3

Bit 2

Bit 1

Bit 0

EIES1

EIES0

R/W

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