IXXBB1 Fujitsu Microelectronics, Inc., IXXBB1 Datasheet - Page 71

• Manufacturer Part Number: IXXBB1
• Description: 32-bit Proprietary Microcontroller Cmos Fr60 Mb91301 Series
• Manufacturer: Fujitsu Microelectronics, Inc.

6. PPG Timer
Features of the PPG Timer
The PPG timer can output highly precise PWM waveforms efficiently.
The MB91301 series contains four channels of PPG timer.
• Each channel consists of a 16-bit down counter, a 16-bit data register with cycle setting buffer, a 16-bit compare
• The count clocks for the 16-bit down counter can be selected from the following four types :
• The counter is initialized to “FFFF
• Each channel has a PPG output.
• Register outline
• Pin control overview
• An interrupt request can be generated at a combination of the following events :
• It is possible to set the simultaneous activation of two or more channels by means of software or another
• The request level to be detected can be selected from among "rising edge", "falling edge", and "both edges".
register with duty setting buffer, and pin control section.
Internal clock
DMA transfer can be initiated by the above interrupt request.
interval timer.
Restarting during operation can also be set.
Cycle setting register: Reload data register with buffer
Duty setting register: Compare register with buffer
Transfer from the buffer takes place upon a counter borrow.
A duty match sets the pin control section to 1. (Preferential)
A counter borrow resets it to 0.
The output value fix mode is available, which can each output all "L" (or "H").
A polarity can also be specified.
Activation of the PPG timer
Counter borrow (cycle match)
Duty match
Counter borrow (cycle match) or duty match
, /4, /16, /64
H
” at a reset or counter borrow.
MB91301 Series
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