EKTF6708 datasheet(41/158 Pages) EMC

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eKTF6708

8-Bit Microcontroller

IC Product Specification (V1.2) 03.12.2020

 31

(This specification is subject to change without prior notice)

Bits 7~0 (TC1DB7~TC1DB0): Data Buffer B of 8 bit Timer/Counter 1

NOTE

When Timer/Counter x is used as PWM mode, the duty value stored at register

TCxDB must be less than or equal to the period value stored at register TCxDA. i.e.,

duty

≦ period. And then the PWM waveform is generated. If duty value is greater than

period value, the PWM output waveform will be kept at high voltage levels.

The period value set by users is extra plus 1 in inner circuit.

For example:

The period value is set as 0x4F, the circuit actually processes 0x50 period length.

The period value is set as 0xFF, the circuit actually processes 0x100 period length.

6.1.35 Bank 0 R28 ~ R2F: (Reserved)

6.1.36 Bank 0 R30: I2CCR1 (I2C Status and Control Register 1)

Bit 7

Bit 6

Bit 5

Bit 4

Bit 3

Bit 2

Bit 1

Bit 0

Strobe/Pend

IMS

ISS

STOP

SAR_EMPTY

ACK

FULL

EMPTY

R/W

Bit 7 (Strobe/Pend): In Master mode, it is used as strobe signal to control I

2C circuit in

sending SCL clock. Automatically reset after receiving or

transmitting handshake signal (ACK or NACK). In Slave mode, it is

used as pending signal. User should clear it after writing data into

Tx buffer or taking data from Rx buffer to inform Slave I

2C circuit to

release SCL signal.

Bit 6 (IMS):

2C Master/Slave mode select bit

0: Slave (Default)

1: Master

Bit 5 (ISS):

2C C Fast/Standard mode select bit (if Fm is 4 MHz and

I2CTS1~0<0,0>)

0: Standard mode (100K bit/s)

1: Fast mode (400K bit/s)

Bit 4 (STOP):

In Master mode, if STOP=1 and R/nW=1, then MCU must return

nACK signal to Slave device before sending STOP signal. If

STOP=1 and R/nW=0, then MCU sends STOP signal after receiving

an ACK signal. MCU resets when it sends STOP signal to Slave

device.

In Slave mode, if STOP=1 and R/nW=0, then MCU must return

nACK signal to Master device.

Bit 3 (SAR_EMPTY): Set when MCU transmits 1 byte data from I

2C Slave Address

writes 1 byte data to I

2C Slave Address Register.

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