HT67F60 datasheet(177/242 Pages) HOLTEK

177 / 242 page

HT67F30/HT67F40/HT67F50/HT67F60

TinyPowerTM A/D Flash Type 8-Bit MCU with LCD & EEPROM

Rev. 1.50

176

March 06 , 2012

Rev. 1.50

177

March 06 , 2012

I2C Bus Data and Acknowledge Signal

The transmitted data is 8-bits wide and is transmitted after the slave device has acknowledged

receipt of its slave address. The order of serial bit transmission is the MSB first and the LSB last.

After receipt of 8-bits of data, the receiver must transmit an acknowledge signal, level "0", before it

can receive the next data byte. If the slave transmitter does not receive an acknowledge bit signal

from the master receiver, then the slave transmitter will release the SDA line to allow the master to

send a STOP signal to release the I2C Bus. The corresponding data will be stored in the SIMD

SIMD register. If setup as a receiver, the slave device must read the transmitted data from the SIMD

When the slave receiver receives the data byte, it must generate an acknowledge bit, known as

TXAK, on the 9th clock. The slave device, which is setup as a transmitter will check the RXAK bit

in the SIMC1 register to determine if it is to send another data byte, if not then it will release the

SDA line and await the receipt of a STOP signal from the master.

I2C Communication Timing Diagram

Da ta

01010

S= St ar t (1 b it )

SA =S la ve A dd re ss (7 b it s)

SR =S RW b i t ( 1 bi t)

M= Sl av e dev ic e s end a ck now l edge bi t (1 b it )

D= Da ta ( 8 bi ts )

A= AC K ( RX AK b i t f or tr ans mi tte r, T XAK b i t f or r ec ei ve r 1 bi t)

P= St op (1 b it )

SC L

St ar t

SD A

SR W

AC K

St op

SC L

SD A

Sl av e Ad dr es s

SS AS R

Note: *When a slave address is matched, the device must be placed in either

the transmit mode and then write data to the SIMD register, or in the

receive mode where it must implement a dummy read from the SIMD

HT67F60 Datasheet(PDF) 177 Page - Holtek Semiconductor Inc

HT67F60 Datasheet(HTML) 177 Page - Holtek Semiconductor Inc

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