CH552E - MSOP10
CH552G - SOP16
CH552T - TSSOP20
CH558T
CH558L
CH559T
CH559L
Assembled with Atmel C51ASM assembler. All files assembled with Zero warning and error. CH552 uses internal oscillator of 24MHz and doesn't require external oscillator or crystal. CH558 and CH559 operates at 48MHz internal oscillator. 2X faster than CH552 or CH554.
CH558 having internal RAM starting address different than CH559. Refer to datasheet. CH558 and CH559 uses SPI extensions apart from I2C used in CH552x.