Overview Of 8/16-Bit Ppg Timer - Fujitsu MB90480 Series Hardware Manual

CHAPTER 15 8/16-BIT PPG TIMER

15.1 Overview of 8/16-Bit PPG Timer

The 8/16-bit PPG timer is a 6-channel reload timer module that can be used any
interval and output pulse of duty ratio.
On the hardware level, the timer consists of six 8-bit decrement counters, twelve 8-bit
reload timers, three 16-bit control registers, six external pulse output pins and six
interrupt outputs.
The MB90480/485 series has six channels that can be used for 8-bit PPG, enabling
paired operation of PPG0 + PPG1, PPG2 + PPG3, and PPG4 + PPG5 for 16-bit PPG
operation (3 channels).
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Functions of 8/16-bit PPG timer
❍ 8-bit PPG output 6-channel independent operation mode
Provides independent PPG output operation with six channels.
❍ 16-bit PPG output operation mode
Provides 16-bit PPG output operation with three channels.
This is achieved by combining PPG0 + PPG1, PPG2 + PPG3 and PPG4 + PPG5.
❍ 8 + 8-bit PPG output operation mode
PPG0 (PPG2/PPG4) output is inputted to PPG1 (PPG3/PPG5) clock, enabling an arbitrary
interval to be used for 8-bit PPG output.
❍ PPG output operation
Provides an arbitrary interval and duty ratio for pulse wave output.
Used in combination with an externally attached circuit for providing a D/A converter.
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