EKTF6708 datasheet(25/158 Pages) EMC

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eKTF6708

8-Bit Microcontroller

IC Product Specification (V1.2) 03.12.2020

 15

(This specification is subject to change without prior notice)

For SUB, SUBB, DEC, DECA, NEG instructions

0: Borrow occurs.

1: No borrow occurs.

For RLC, RRC, RLCA, RRCA instructions

The Carry flag is used as a link between the least significant bit (LSB) and the most

significant bit (MSB).

6.1.5 R4: RSR (RAM Select Register)

Bit 7

Bit 6

Bit 5

Bit 4

Bit 3

Bit 2

Bit 1

Bit 0

RSR7

RSR6

RSR5

RSR4

RSR3

RSR2

RSR1

RSR0

R/W

Bits 7~0 (RSR7~RSR0): These bits are used to select registers (Address 00 ~ FF) in

indirect addressing mode. For more details, refer to the table on Data Memory

Configuration in Section 6.1.3, R2: PCL (Program Counter Low).

6.1.6 Bank 0 R5 ~ R7: (Port 5 ~ Port 7)

R5, R6, and R7 are I/O data registers.

6.1.7 Bank 0 R8 ~ RA: (Reserved)

6.1.8 Bank 0 RB~RD: (IOCR5 ~ IOCR7)

These registers are used to control the I/O port direction. They are both

readable and writable.

0: Set the relative I/O pin as output

1: Set the relative I/O pin into high impedance

6.1.9 Bank 0 RE: OMCR (Operating Mode Control Register)

Bit 7

Bit 6

Bit 5

Bit 4

Bit 3

Bit 2

Bit 1

Bit 0

CPUS

IDLE

PERCS

FMSF

RCM1

RCM0

R/W

Bit 7 (CPUS): CPU Oscillator Source Select.

0: Fs: sub-oscillator

1: Fm: main-oscillator (default)

When CPUS=0, the CPU oscillator select sub-oscillator and the main oscillator

is stopped.

Bit 6 (IDLE): Idle Mode Enable Bit. This bit will decide SLEP instruction which mode to go.

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