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( 4 )- CH421:Bidirectional buffer interface chip, parallel port communication, asynchronous data exchange, no need to synchronize and wait for read and write operations, the maximum transmission speed is not less than 7Mbytes per second
- PCI based Dual UARTs and printer port chip CH353
- PCI Bus Interface Chip: CH365
- CH361: PCI通用接口芯片,新产品建议使用CH365或CH367