Fujitsu MB90460 Series, Hardware Manual, Page: 337 / 739

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CHAPTER 14 MULTI-FUNCTIONAL TIMER
14.4.10 Waveform Control Register (SIGCR)
Waveform control register is used to control how the operating clock frequencies, noise
cancellation function enable, DTTI0 input enable and DTTI0 interrupt.
■
Waveform Control Register (SIGCR)
Figure 14.4-22 Waveform Control Register (SIGCR)
Address bit15 14 13 12 11 10 9 8 Initial value
000059
H
DTIE DTIF NRSL DCK2 DCK1 DCK0 NWS1 NWS0 00000000
B
R/W R/W R/W R/W R/W R/W R/W R/W
NWS1 NWS0 DTTI0 Noise width selection bits
0 0 Cancel 4-cycle noise.
0 1 Cancel 8-cycle noise.
1 0 Cancel 16-cycle noise.
1 1 Cancel 32-cycle noise.
DCK2 DCK1 DCK0 Operating clock selection bit
0 0 0
φ
(62.5 ns,
φ
= 16 MHz)
0 0 1
φ
/2 (125 ns,
φ
= 16 MHz)
0 1 0
φ
/4 (250 ns,
φ
= 16 MHz)
0 1 1
φ
/8 (500 ns,
φ
= 16 MHz)
1 0 0
φ
/16 (1
µ
s,
φ
= 16 MHz)
1 0 1
φ
/32 (2
µ
s,
φ
= 16 MHz)
1 1 0
φ
/64 (4
µ
s,
φ
= 16 MHz)
1 1 1 Prohibited
φ
: Machine clock
NRSL Noise cancellation function enable bit
0 DTTI0 input does not go thru the noise cancellation circuit.
1 DTTI0 input goes thru the noise cancellation circuit.
DTIF
DTTI0 interrupt flag bit
Read Write
0 No interrupt request Clear this bit
1 Has interrupt request No effect
DTIE DTTI0 input enable bit
0 Disable DTTI0 input
1 Enable DTTI0 input
R/W : Read and Write
: Initial value