8XC196MC, MD, MH USER’S MANUAL

PTS Serial I/O Mode Control Block 1 (Continued) (8XC196MC, MD)

Register

Location

Function

 

 

 

PTSCOUNT

PTSCB1 + 0

Consecutive PTS Cycles

 

 

Defines the number of bits to be transmitted or received,

 

 

including parity and stop bits, but not the start bit. For

 

 

asynchronous modes, program a number that is between 1–16.

 

 

For synchronous modes, program a number that is twice the

 

 

number of bits to be transmitted or received (2–32). PTSCOUNT

 

 

is decremented at the end of each PTS cycle. When it reaches

 

 

zero, hardware clears the corresponding PTSSEL bit and sets

 

 

the PTSSRV bit, which requests the end-of-PTS interrupt.

 

 

 

Figure 5-19. PTS Control Block 1 – Serial I/O Mode (Continued)

5-40

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