Looks like instruction takes 2 clock cycle to execute. So 1T means iHRC/2. With 16Mhz crystal cpu is executing 8Mips. Based on appnote PMC-APN008 http://www.padauk.com.tw//upload/ApplicationNote/APN008_PMS150B_PMS154_user_guide_v003_EN.pdf.
Looks like instruction takes 2 clock cycle to execute. So 1T means iHRC/2. With 16Mhz crystal cpu is executing 8Mips.
Based on appnote PMC-APN008 http://www.padauk.com.tw//upload/ApplicationNote/APN008_PMS150B_PMS154_user_guide_v003_EN.pdf.