E62655RUSB Renesas Electronics America, E62655RUSB Datasheet - Page 500

• Manufacturer Part Number: E62655RUSB
• Description: EMULATOR BASE H8S/2655R W/USB
• Manufacturer: Renesas Electronics America
• Type: Microcontrollerr

Specifications of E62655RUSB

• Contents: E6000 Emulator Unit and 4 Logic Probes
• For Use With/related Products: H8S/2655R
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

Section 10 16-Bit Timer Pulse Unit (TPU)
Phase Counting Mode
In this mode, TCNT is incremented or decremented by detecting the phases of two clocks input
from the external clock input pins in channels 1, 2, 4, and 5. When phase counting mode is set, the
corresponding TCLK pin functions as the clock pin, and TCNT performs up- or down-counting.
This can be used for two-phase encoder pulse input.
10.4.2
Counter Operation
When one of bits CST0 to CST5 is set to 1 in TSTR, the TCNT counter for the corresponding
channel starts counting. TCNT can operate as a free-running counter, periodic counter, and so on.
Example of count operation setting procedure: Figure 10.6 shows an example of the count
operation setting procedure.
Rev. 5.00 Sep 14, 2006 page 470 of 1060
REJ09B0331-0500
Select output compare register
Select counter clearing source
Basic Functions
Start count operation
Select counter clock
Operation selection
<Periodic counter>
Periodic counter
Set period
Figure 10.6 Example of Counter Operation Setting Procedure
[1]
[2]
[3]
[4]
[5]
<Free-running counter>
Free-running counter
Start count operation
[5]
[1]
[2]
[3]
[4]
[5]
Select the counter
clock with bits
TPSC2 to TPSC0 in
TCR. At the same
time, select the
input clock edge
with bits CKEG1
and CKEG0 in TCR.
For periodic counter
operation, select the
TGR to be used as
the TCNT clearing
source with bits
CCLR2 to CCLR0 in
TCR.
Designate the TGR
selected in [2] as an
output compare
register by means of
TIOR.
Set the periodic
counter cycle in the
TGR selected in [2].
Set the CST bit in
TSTR to 1 to start
the counter
operation.