MC-78F0712-KIT Renesas Electronics America, MC-78F0712-KIT Datasheet - Page 165

• Manufacturer Part Number: MC-78F0712-KIT
• Description: KIT REF SYSTEM 78K0 UPD78F0712
• Manufacturer: Renesas Electronics America

Specifications of MC-78F0712-KIT

• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

8.4.2
counter 50 (TM50).
Either the rising or falling edge can be selected.
and an interrupt request signal (INTTM50) is generated.
The external event counter counts the number of external clock pulses to be input to the TI50 pin by 8-bit timer
TM5n is incremented each time the valid edge specified by timer clock selection register 50 (TCL50) is input.
When the TM50 count value matches the value of 8-bit timer compare register 50 (CR50), TM50 is cleared to 0
Whenever the TM50 value matches the value of CR50, INTTM50 is generated.
<1> Set each register.
<2> When TCE50 = 1 is set, the number of pulses input from the TI50 pin is counted.
<3> When the values of TM50 and CR50 match, INTTM50 is generated (TM50 is cleared to 00H).
<4> After these settings, INTTM50 is generated each time the values of TM50 and CR50 match.
Setting
TM50 count value
Operation as external event counter (Timer 50 only)
Remark N = 00H to FFH
INTTM50
Set the port mode register (PM50) to 1.
TCL50: Select TI50 pin input edge.
CR50:
TMC50: Stop the count operation, select the mode in which clear & start occurs on match of TM50 and
Figure 8-11. External Event Counter Operation Timing (with Rising Edge Specified)
CR50
TI50
TI50 pin falling edge
TI50 pin rising edge
Compare value
CR50, disable the timer F/F inversion operation, disable timer output.
(TMC50 = 0000
Count start
00
CHAPTER 8 8-BIT TIMER/EVENT COUNTERS 50 AND 51
01
00B
02
TCL50 = 01H
TCL50 = 00H
03
User’s Manual U17890EJ2V0UD
= Don’t care)
04
05
N
1
N
N
00
01
02
03
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