MC-78F0712-KIT Renesas Electronics America, MC-78F0712-KIT Datasheet - Page 125

• 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

(4) Prescaler mode register 00 (PRM00)
Notes 1.
Remarks 1. f
This register is used to set the 16-bit timer counter 00 (TM00) count clock and valid edges of the TI000 and TI001
pin inputs.
PRM00 can be set by a 1-bit or 8-bit memory manipulation instruction.
RESET input clears PRM00 to 00H.
Address: FF7FH
Symbol
PRM00
2.
2. TI000, TI001: 16-bit timer/event counter 00 input pin
Be sure to set the count clock so that the following condition is satisfied.
The external clock requires a pulse two cycles longer than internal clock (f
V
X
: X1 input clock oscillation frequency
DD
PRM001
ES101
ES101
ES001
= 4.0 to 5.5 V: Count clock
7
0
0
1
1
0
0
1
1
0
0
1
1
After reset: 00H
Figure 7-8. Format of Prescaler Mode Register 00 (PRM00)
PRM000
ES100
ES000
ES100
6
0
1
0
1
0
1
0
1
0
1
0
1
CHAPTER 7 16-BIT TIMER/EVENT COUNTER 00
R/W
Falling edge
Rising edge
Setting prohibited
Both falling and rising edges
Falling edge
Rising edge
Setting prohibited
Both falling and rising edges
f
f
f
TI000 pin valid edge
X
X
X
/2
/2
/2
ES001
2
8
User’s Manual U17890EJ2V0UD
5
10 MHz
ES000
4
Note 2
TI001 pin valid edge selection
TI000 pin valid edge selection
Count clock selection
10 MHz
5 MHz
78.125 kHz
3
0
At f
X
= 20 MHz
2
0
Note 1
X
8 MHz
4 MHz
62.5 kHz
).
PRM001
1
At f
X
= 16 MHz
PRM000
0
123