Fujitsu Series 3 Manual

 
3. Operations 
 
 Explanation of operation modes 
  8-bit PPG operation mode 
One channel can operate as 8-bit PPG independently. 
   16-bit PPG operation mode 
Two channels are combined, and the comb ined channel operates as 16-bit PPG. 
   8+8-bit PPG operation mode 
In this mode, it needs two PPGs. One channel operates as an 8-bit prescaler. Another channel operates as 
8-bit PPG timer. The borrow output of prescaler is counted, and allows 8-bit  PPG pulse in any cycle. 
   16+16-bit PPG...

 
3. Operations 
 
 Selecting the count clock 
The count clocks to be used are PCLK clocks, and can be selected from one of the following four types of 
count clock inputs. The count clock operates as shown on  Ta b l e  3 - 2. 
Table 3-2 Count clock selection 
PCS1 PCS0  Count clock operation 
0 0 The Count Clock is counted for PCLK cycle. 
0  1 The Count Clock is counted for 4 cycles of PCLK. 
1  0 The Count Clock is counted for 16 cycles of PCLK. 
1  1 The Count Clock is counted for 64 cycles of...

 
3. Operations 
 
Figure 3-2 An example of PPG operation by GATE signal from the multifunction timer 
 
GATE signal of 
multifunction timer
PPG Count cycle
StartStop
PPG Count cycle
Start Stop
EDGE=0 (Start at rising edge, and stop at falling edge)
PPG output
  
GATE signal of 
multifunction timer
PPG Count cycle
Start
Stop
PPG Count cycle
StartStop
EDGE=1 (Start at falling edge, and stop at rising edge)
PPG output
  
 
1. PPG continues output operation during the GATE signal is active. 
2.  After LOW...

 
3. Operations 
 
3.2.  Timing generator circuit operations 
The Timing generator circuit compares its built-in, 8-bit UP counter value with the 8-bit 
compare register value, and generates/outputs a start trigger signal of PPG Timer when they 
match.  
If a compare register is set for each PPG timer, multiple PPG timers can be synchronized and 
they can be started with a delay of each PPG start timing. 
   A delay period can be set by the four compare registers relating to each PPG channel. The 8-bit...

 
3. Operations 
 
  Figure 3-4  gives an example of Timing Generator compare startup. 
 
Figure 3-4 An example of timing generator compare startup 
 8-bit up counter
Count cycle
MONI=1
Count starts if
STR=1.
F0H
A0H
80H
40H
F0H
A0H
80H
40H
COMP6 COMP4 COMP2
COMP0
PPG6TG PPG4TG PPG2TG PPG0TG
TRG0O=0,
TRG2O=0
COMP0 matching
COMP2 matching
COMP4 matching
COMP6 matching
TRG4O=0,
TRG6O=0
PPG0 output
PPG2 output
PPG4 output
PPG6 output  
  1. When TTCR.STR=1 is set, the 8-bit UP counter starts counting....

 
4. Setup Procedure Example 
 
4.  Setup Procedure Example 
This section explains a setting procedure example of PPG. 
 PPG function setup procedure (example) 
 
FUJITSU SEMICONDUCTOR LIMITED 
 
Sta r t 
Access to the PPGC register. 
Set an operation mode, interrupt, and clocks.
 
 
Do you stop the PPG? 
GATEC.STRG=0
GATEC.STRG=1 
End 
Timing Generator Circuit: 
Go to the Start Trigger Setting section (below). 
PPGC.TTRG=0 
Register: Set a start trigger. 
PPGC.TTRG=1
Access to the GATEC register. 
Set...

 
4. Setup Procedure Example 
 
 Timing generator circuit  setup procedure (example) 
 
FUJITSU SEMICONDUCTOR LIMITED 
  
 
Do you stop the PPG? 
Timing Generator Circuit: 
Set a start tri
gger.
Access to the TTCR register. Set a Compare clock. 
End 
Access to the COMP register. 
Set a Compare Register value.
Ye s
TTCR.MONI=0?  No
Access to the TTCR register. 
Enable PPG operation. 
(STR=1)
The PPG starts. (Operation)   
Ye s No
Access to the TTCR register. 
Stop the PPG start trigger. (TRGnO=0)
Access...

 
5. Registers 
 
5. Registers 
This section explain the registers of PPG. 
Ta b l e  5 - 1 lists and explains PPG Registers. 
Table 5-1 PPG Register list 
Abbreviation Register name See 
TTCR0  PPG Start Trigger Control Register 0  5.1 
TTCR1 PPG Start Trigger Control Register 1  5.2 
COMP0 PPG Compare Register 0 
COMP1 PPG Compare Register 1 
COMP2 PPG Compare Register 2 
COMP3 PPG Compare Register 3 
COMP4 PPG Compare Register 4 
COMP5 PPG Compare Register 5 
COMP6 PPG Compare Register 6 
COMP7 PPG...

 
5. Registers 
 
Abbreviation Register name  See 
PRLH3 PPG Reload Register H3 
PRLL3 PPG Reload Register L3 
PRLH4  PPG Reload Register H4 
PRLL4 PPG Reload Register L4 
PRLH5  PPG Reload Register H5 
PRLL5 PPG Reload Register L5 
PRLH6  PPG Reload Register H6 
PRLL6 PPG Reload Register L6 
PRLH7  PPG Reload Register H7 
PRLL7 PPG Reload Register L7 
PRLH8  PPG Reload Register H8 
PRLL8 PPG Reload Register L8 
PRLH9  PPG Reload Register H9 
PRLL9 PPG Reload Register L9 
PRLH10 PPG Reload Register H10...

 
5. Registers 
 
5.1.  PPG Start Trigger Control Register 0 (TTCR0) 
The TTCR0 Register controls a start of PPG0/PPG2/PPG4/PPG6 Register. 
 Register configuration 
Bit  15 14 13  12 11 10  9 8 
Field TRG6O TRG4O TRG2O TRG0O CS01 CS00 MONI0  STR0 
Attribute  R/W R/W R/W  R/W R/W R/W  R R/W 
Initial value  1b1 1b1 1b1  1b1 1b0 1b0 1b0 1b0 
           
Bit  7 6 5  4 3 2 1 0 
Field Reserved 
Attribute - 
Initial value  - 
 
  Register functions 
[Bits 15:12] TRG6O, TRG4O, TRG2O,  TRG0O: PPG trigger stop...