PD17012_15 Datasheet, PDF (207/320 Pages) Renesas Technology Corp – 4-BIT SINGLE-CHIP MICROCONTROLLERS WITH DIGITAL TUNING SYSTEM HARDWARE

µPD17012, 17P012
Figure 17-8. Configuration of IF Counter Data Register
DBF3
Data buffer
DBF2
DBF1
Transfer data
DBF0
Name
IF counter
data register
GET can be executed
16
PUT changes nothing
Peripheral register
b15 b14 b13 b12 b11 b10 b9 b8 b7 b6 b5 b4 b3 b2 b1 b0 Symbol Peripheral address
IFC
43H
Valid data
Count value of frequency counter
0
IF counter function
• FMIF count mode of FMIFC pin
Counts rising edge of signal input to
P1B3/FMIFC pin via 1/2 divider
• AMIF count mode of AMIFC pin
Counts rising edge of signal input to
P1B2/AMIFC pin
• AMIF count mode of FMIFC pin
x
Counts rising edge of signal input to
P1B3/FMIFC pin
2¹⁶ −1 (FFFFH)
External gate counter function
Counts rising edge of internal reference
frequency signal from rising edge to next
rising edge of signal input to P0B2/FCG0
or P0B3/FCG1 pin
The IF counter is cleared to 0000H when its count value has reached FFFFH, and then continues counting.
Data Sheet U10101EJ4V0DS
205