Waveform Control Register (Sigcr) - Fujitsu MB90460 Series Hardware Manual

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)
Address bit15
000059 DTIE DTIF NRSL DCK2 DCK1 DCK0 NWS1 NWS0 00000000
H
R/W R/W
R/W : Read and Write
: Initial value
318
Figure 14.4-22 Waveform Control Register (SIGCR)
14 13 12 11
R/W R/W R/W
φ: Machine clock
10 9 8
R/W R/W R/W
NWS1 NWS0
0 0
0 1
1 0
1 1
DCK2 DCK1 DCK0
0 0 0
0 0 1
0 1 0
0 1 1
1 0 0
1 0 1
1 1 0
1 1 1
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
Read
0 No interrupt request
1 Has interrupt request
DTIE
0
1
Initial value
B
DTTI0 Noise width selection bits
Cancel 4-cycle noise.
Cancel 8-cycle noise.
Cancel 16-cycle noise.
Cancel 32-cycle noise.
Operating clock selection bit
φ (62.5 ns, φ = 16 MHz)
φ/2 (125 ns, φ = 16 MHz)
φ/4 (250 ns, φ = 16 MHz)
φ/8 (500 ns, φ = 16 MHz)
φ/16 (1 µs, φ = 16 MHz)
φ/32 (2 µs, φ = 16 MHz)
φ/64 (4 µs, φ = 16 MHz)
Prohibited
DTTI0 interrupt flag bit
Write
Clear this bit
No effect
DTTI0 input enable bit
Disable DTTI0 input
Enable DTTI0 input