Я задал этот же вопрос в саппорт филипса, вот их ответ:
Цитата
Philips Semiconductors answer:
Yes, The write cabability was intented for test purposes so that is why it was not in the documentation since the IOSET and IOCLR are most often used to set port pin states. But, there is no problem writing to IO0PIN.
Regards
Jim E.