ISP

MINI51 48 pin

UART:
TX: P0.0 pin37
RX: P0.1 pin38

SPI:
CLK: P0.7   pin32
MISO: P0.6  pin33
MOSI: PC0.5 pin34
SS0: P0.4   pin35


I2C:
SDA: P3.4 pin9
SCK: P3.5 pin10