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G
Details of pins in block diagram
Table 10.2-2 lists the actual pin names and interrupt request numbers of the 8-/16-bit PPG timer.
Table 10.2-2 Pins and Interrupt Request Numbers in Block Diagram
Channel
PPG0
PPG1
PPG2
PPG3
G
PPG operation mode control register 1 (PPGC1)
These bits set the operation mode of the 8-/16-bit PPG timer.This register sets the operation mode of the 8-/
16-bit PPG timer, enables or disables the operation of the 8-/16-bit PPG timer 1, the pin output and an
underflow interrupt, and also indicates the generation of an underflow. It also indicates the occurrence of an
underflow.
G
PPG0/1 count clock select register (PPG01)
This register sets the count clock of the 8-/16-bit PPG timer 0.
G
PPG1 reload registers (PRLH1 and PRLL1)
These registers set the High width or Low width of the output pulse.The values set in these registers are
reloaded to the PPG1 down counter (PCNT1) when the 8-/16-bit PPG timer 1 is started.
G
PPG1 down counter (PCNT1)
This counter is an 8-bit down counter that alternately reloads the values set in the PPG1 reload registers
(PRLH1 and PRLL1) and counts down. The pin output is inverted when underflow occurs.This counter is
concatenated for use as a single-channel 16-bit PPG down counter.
G
PPG1 temporary buffer (PRLBH1)
This buffer prevents deviation of the output pulse width caused at writing to the PPG reload registers
(PRLH1 and PRLL1).It stores the PRLH1 value temporarily and enables it in synchronization with the
timing of writing to the PRLL1.
G
Reload register L/H selector
This selector detects the current pin output level to select which register value, Low reload register
(PRLL1) or High reload register (PRLH1), should be reloaded to the PPG1 down counter.
G
Count clock selector
This selector selects the count clock to be input to the PPG1 down counter from five frequency-divided
clocks of the machine clock or the frequency-divided clocks of the timebase timer.
Output Pin
Interrupt Request Number
P14/PPG0
P15/PPG1
P16/PPG2
P17/PPG3
CHAPTER 10 8/16-bit PPG timer
#22 (16
)
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#26 (1A
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