Chapter 5
Interrupt Controller
V - 42 Noise Filter Function
5.4.4 Noise Filter Sampling Clock Setting Registers
■ Sampling Clock Setting Register 0 (NFCLK0: 0x0000A050) [8, 16-bit access register]
bp 1514131211109876543210
Flag
NFCK
71
NFCK
70
NFCK
61
NFCK
60
NFCK
51
NFCK
50
NFCK
41
NFCK
40
NFCK
31
NFCK
30
NFCK
21
NFCK
20
NFCK
11
NFCK
10
NFCK
01
NFCK
00
At reset 0 0 00000000000000
Access R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W
bp Flag Description Set condition
15-14
NFCK71
NFCK70
Select the IRQ7 sampling clock 00: 1/4 of IOCLK frequency
01: 1/8 of IOCLK frequency
10: 1/16 of IOCLK frequency
11: 1/32 of IOCLK frequency
13-12
NFCK61
NFCK60
Select the IRQ6 sampling clock 00: 1/4 of IOCLK frequency
01: 1/8 of IOCLK frequency
10: 1/16 of IOCLK frequency
11: 1/32 of IOCLK frequency
11-10
NFCK51
NFCK50
Select the IRQ5 sampling clock 00: 1/4 of IOCLK frequency
01: 1/8 of IOCLK frequency
10: 1/16 of IOCLK frequency
11: 1/32 of IOCLK frequency
9-8
NFCK41
NFCK40
Select the IRQ4 sampling clock 00: 1/4 of IOCLK frequency
01: 1/8 of IOCLK frequency
10: 1/16 of IOCLK frequency
11: 1/32 of IOCLK frequency
7-6
NFCK31
NFCK30
Select the IRQ3 sampling clock 00: 1/4 of IOCLK frequency
01: 1/8 of IOCLK frequency
10: 1/16 of IOCLK frequency
11: 1/32 of IOCLK frequency
5-4
NFCK21
NFCK20
Select the IRQ2 sampling clock 00: 1/4 of IOCLK frequency
01: 1/8 of IOCLK frequency
10: 1/16 of IOCLK frequency
11: 1/32 of IOCLK frequency
3-2
NFCK11
NFCK10
Select the IRQ1 sampling clock 00: 1/4 of IOCLK frequency
01: 1/8 of IOCLK frequency
10: 1/16 of IOCLK frequency
11: 1/32 of IOCLK frequency
1-0
NFCK01
NFCK00
Select the IRQ0 sampling clock 00: 1/4 of IOCLK frequency
01: 1/8 of IOCLK frequency
10: 1/16 of IOCLK frequency
11: 1/32 of IOCLK frequency
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