PD17012_15 Datasheet, PDF (200/320 Pages) Renesas Technology Corp – 4-BIT SINGLE-CHIP MICROCONTROLLERS WITH DIGITAL TUNING SYSTEM HARDWARE

µPD17012, 17P012
Figure 17-3. Configuration of IF Counter Mode Select Register
Name
IF counter mode select
register
Flag symbol
b3 b2 b1 b0
II II
FF FF
CC CC
MM C C
DD KK
10 10
Address
12H
Read/write
R/W
Selects gate time of IF counter and reference frequency of external gate counter
Gate time of IF counter
Reference frequency of
external gate counter
0 0 1 ms
1 kHz
0 1 4 ms
100 kHz
1 0 8 ms
900 kHz
1 1 Open
0 kHz
00
01
10
11
Selects function of IF counter or external gate counter
External gate counter (FCG)
IF counter (AMIFC pin, AMIF count mode)
IF counter (FMIFC pin, FMIF count mode)
IF counter (FMIFC pin, AMIF count mode)
Power-on
Clock stop
CE
0000
0000
Retained
Caution The IF counter and external gate counter functions cannot be used at the same time.
198
Data Sheet U10101EJ4V0DS