Hitachi H8S/2633 Hardware Manual page 540

Operation of Pulse Output Pins: Pins PO8 to PO15 are also used for other peripheral functions

such as the TPU. When output by another peripheral function is enabled, the corresponding pins

cannot be used for pulse output. Note, however, that data transfer from NDR bits to PODR bits

takes place, regardless of the usage of the pins.

Pin functions should be changed only under conditions in which the output trigger event will not

Note on Non-Overlapping Output: During non-overlapping operation, the transfer of NDR bit

values to PODR bits takes place as follows.

• NDR bits are always transferred to PODR bits at compare match A.

• At compare match B, NDR bits are transferred only if their value is 0. Bits are not transferred

if their value is 1.

Figure 12-10 illustrates the non-overlapping pulse output operation.

Normal output/inverted output

Figure 12-10 Non-Overlapping Pulse Output

Compare match A

Compare match B

Internal data bus