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CHAPTER 10 8/16-bit PPG timer
10.1
Overview of 8-/16-bit PPG Timer
The 8-/16-bit PPG timer is a reload timer module with two channels (PPG0 and PPG1)
that outputs a pulse in any cycle and at any duty ratio.A combination of two channels
provides:
• 8-bit PPG output 2-channel independent operation mode
• 16-bit PPG output mode
• 8 + 8-bit PPG output mode
The MB90895 series has two 8-/16-bit PPG timers.This section explains the functions of
PPG0/1. PPG2/3 has the same functions as PPG0/1.
I Functions of 8-/16-bit PPG Timer
The 8-/16-bit PPG timer consists of four eight-bit reload registers (PRLH0/PRLL0, PRLH1/PRLL1) and
two PPG down counters (PCNT0, PCNT1).
• Individual setting of High and Low widths in output pulse enables an output pulse of any cycle and duty
ratio.
• The count clock can be selected from six internal clocks.
• The 8-/16-bit PPG timer can be used as an interval timer by generating an interrupt request at each
interval time.
• An external circuit enables the 8-/16-bit PPG timer to be used as a D/A converter.
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