PixArt Imaging Inc.

PAC107

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PixArt Imaging Inc.

E-mail:

fae_service@pixart.com.tw

V1.4, Aug, 2005

Serial I/O Port 1

Serial I/O port 1 is the same as serial I/O port mentioned above. RXD1 is at P1.2 and

TXD1 at P1.3. The Serial I/O port 1 has its own buffer (SBUF1, C1h) and control register

(SCON1, C0h). All functions and structures are the same as serial I/O port. But the only

difference is that serial I/O port 1 only uses timer 1 for baud rate at mode 1 and mode 3.

The double baud rate bit SMODE1 is at WDCON (D8h) register.

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