Cannot set TWI clock under 30khz

[legianrd]

Hi, I need to establish TWI communication under 5khz, but when I set values under 30khz in TWI_Init() routine the real clock I can read with logic analyzer is around 100kHz. Setting values over 30khz to 400khz the clock readed is the same I set.

I'm using Atmega32 with 16Mhz xtal. I need some help.

Please, can anyone help me?

[legianrd]

Solved.

Instead of using TWI_Init() function I've used the following equation from Atmega32 datasheet

SCLclock = CPU_FREQ/16+ 2(TWBR)*4^TWPS

So, setting registers value as TWBR=0x72 and TWSR=0xFB I've got a 1095Hz SCL clock.