Waveform Control Register (Sigcr1, Sigcr2) - Fujitsu MB91260B Series Hardware Manual

11.4.12

Waveform Control Register (SIGCR1, SIGCR2)

The waveform control register is used to control the operating clock frequency, enable
the noise cancel feature, enable DTTI input, and control DTTI interrupts.
■ Waveform Control Register 1 (SIGCR1)
Waveform control register 1
Bit7 Bit6
DTIE DTIF
R/W R/W
R/W: Readable/Writable
: Initial value
Bit5 Bit4 Bit3
NRSL DCK2 DCK1
R/W R/W R/W
NWS1 NWS0
0
0
1
1
DCK2 DCK1 DCK0
0
0
0
0
1
1
1
1
φ : Machine cycle
NRSL
0
1
DTIF
0
1
DTIE
0
1
CHAPTER 11 MULTIFUNCTIONAL TIMER
Bit2 Bit1 Bit0
DCK0 NWS1 NWS0
R/W R/W R/W
DTTI noise width selection bit
0 Cancel noise of 4cycles
1 Cancel noise of 8cycles
0 Cancel noise of 16cycles
1 Cancel noise of 32cycles
φ (62.5ns, φ=16MHz)
0 0
φ/2 (125ns, φ=16MHz)
0 1
φ/4 (250ns, φ=16MHz)
1 0
φ/8 (500ns, φ=16MHz)
1 1
φ/16 (1ms, φ=16MHz)
0 0
φ/32 (2ms, φ=16MHz)
0 1
φ/64 (4ms, φ=16MHz)
1 0
1 1
Noise cancel function valid bit
Noise cancel circuit of DTTI input is invalid.
Noise cancel circuit of DTTI input is valid.
DTTI interrupt flag bit
Read
No interrupt request
Interrupt request
DTTI input valid bit
Invalid DTTI input
Valid DTTI input
SIGCR1
Address: 0000C9
Initial value: 00000000
Operation clock selection bit
Disable
Write
This bit is cleared.
No effect on this bit.
H
B
251