Hi If I select Philips 89c669 I get this The Keil µVision2 Debugger simulates the following on-chip peripherals for the Philips P89C669. CPU Clock Generation Interrupts 10S/4L (Including External) PCA Timer with Modules Port 0 Port 1 Port 2 Port 3 Port 4 (2-bit) Power Saving Modes (Idle and Power Down) Serial UART 0 (Enhanced Interface with S0STAT and Special BRG) Serial UART 1 (Enhanced Interface with S1STAT and Special BRG without T1 or T2) SPI (Serial Peripheral Interface) Timer 0 Timer 1 Timer 2 (Extended Timer 2 with PWM Mode) Watchdog Timer 669 don't have an SPI, but it have I2C Is this a BUG?? /Ingo