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CS5535 데이터시트(PDF) 158 Page - National Semiconductor (TI)

[Old version datasheet] Texas Instruments acquired National semiconductor.
부품명 CS5535
상세설명  Geode??CS5535 I/O Companion Multi-Function South Bridge
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Revision 0.8
MFGPT Functional Description (Continued)
4.16.5 Working Power Domain Logic
The Working power domain logic consists of the Local Bus
Interface, Control Logic, MSRs, and NMI, IRQ, and Reset
Output Events.
When Event mode is enabled, the NMI, IRQ, and Reset
Output Events logic gathers the event outputs of all eight
MFGPTs and then generates the interrupt and resets out-
puts based on MSR settings. The interrupt outputs go to
the PIC that can then trigger an IRQ or ASMI. Note that
MFGPT6 and MFGPT7 cannot trigger reset. These outputs
are controlled by MSR bits, and the NMI output can be fur-
ther controlled by the MSB of I/O Address 070h.
4.16.6 Power Domain Crossing Interface Logic
The asynchronous internal Standby State signal will dis-
able/enable the Working power domain interface immedi-
ately. Therefore, any bus operation active at that time will
have an indeterminate result.
Table 4-33. MFGPT Pulse Density Modulation Example
Up Counter Output
Bit Reverse Output
Pulse Train Output for Given Compare 1 Value (Note 1)
124
56
000
000
0
0
0
0
0
001
100
1
1
1
0
0
010
010
1
1
0
0
0
011
110
1
1
1
1
1
100
001
1
0
0
0
0
101
101
1
1
1
1
0
110
011
1
1
0
0
0
111
111
1
1
1
1
1
Note 1. Compare 2 Value must be set to all 1s for pulse density modulation.



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