Hitachi H8S/2633 Hardware Manual page 517

Section 12 Programmable Pulse Generator (PPG)

The H8S/2633 Series has a built-in programmable pulse generator (PPG) that provides pulse

outputs by using the 16-bit timer-pulse unit (TPU) as a time base. The PPG pulse outputs are

divided into 4-bit groups (group 3 and group 2) that can operate both simultaneously and

independently.

PPG features are listed below.

• 8-bit output data

 Maximum 8-bit data can be output, and output can be enabled on a bit-by-bit basis

• Two output groups

 Output trigger signals can be selected in 4-bit groups to provide up to two different 4-bit

• Selectable output trigger signals

 Output trigger signals can be selected for each group from the compare match signals of

four TPU channels

• Non-overlap mode

 A non-overlap margin can be provided between pulse outputs

• Can operate together with the data transfer controller (DTC) and DMA controller (DMAC)

 The compare match signals selected as output trigger signals can activate the DTC or

DMAC for sequential output of data without CPU intervention

• Settable inverted output

 Inverted data can be output for each group

• Module stop mode can be set

 As the initial setting, PPG operation is halted. Register access is enabled by exiting module