Block Diagram Of 8/16-Bit Ppg - Fujitsu MB90390 Series Hardware Manual

CHAPTER 16 8/16-BIT PPG
16.2

Block Diagram of 8/16-bit PPG

Figure 16.2-1 shows a 8/16-bit PPG ch.0 block diagram. Figure 16.2-2 shows a 8/16-bit
PPG ch.1 block diagram.
■ Block Diagram of 8/16-bit PPG
Count clock
selection
Time-base counter output,
512-division of main clock
"L"/"H" selection
250
Figure 16.2-1 8/16-bit PPG ch.0 Block Diagram
Peripheral clock 16-division
Peripheral clock 8-division
Peripheral clock 4-division
Peripheral clock 2-division
Peripheral clock
Invert
PCNT
(down counter)
Reload
"L"/"H" selector
PRLL0
PRLH0
PPG00 output enable
PPG00
Output latch
Clear
PEN0
S
R Q
PRLBH0
(Temporary buffer)
PIE0
PUF0
(Operation mode control)
PPG00
In MB90390 series, this IRQ signal merged
with the Channel1 IRQ signal by OR logic.
ch.1 borrow
"L" data bus
"H" data bus
PPGC0
IRQ