Block Diagram Of 16-Bit Ppg Timer - Fujitsu MB90460 Series Hardware Manual

13.2

Block Diagram of 16-bit PPG Timer

This section shows the block diagram of 16-bit PPG timer.
■ Block Diagram of 16-bit PPG Timer
Prescaler
CKS2 CKS1 CKS0
1/1
1/2
1/4
1/8
1/16
1/32
1/64
1/128
Machine clock φ
GATE - from multi-functional
timer (for PPG ch. 0 only)
Edge detection
Figure 13.2-1 Block Diagram of 16-bit PPG Timer
Period Setting Buffer Register 0/1/2
Period Setting Register 0/1/2
CLK LOAD
16-bit down counter
STOP
START
BORROW
(for PPG ch. 1 & 2)
STGR CNTE RTRG
Duty Setting Buffer Register 0/1/2
Duty Setting Register 0/1/2
Comparator
S Q
R
Interrupt
selection
IRS1 IRS0
CHAPTER 13 16-BIT PPG TIMER
MDSE PGMS OSEL POEN
PPG0 (multi-functional timer)
or
PPG1 (multi-pulse generator)
or
PPG2
Interrupt
#14/#16/#32
IRQF IREN
P37/PPG0
or
P36/PPG1
or
P46/PPG2
Pin
259