SPRS292 − OCTOBER 2005
HOST-PORT INTERFACE TIMING (CONTINUED)
HAS |
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| 1 |
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1 | 2 |
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| 2 | |
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HCNTL[1:0] |
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1 | 2 |
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| 1 | 2 |
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HR/W |
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1 | 2 |
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| 1 | 2 |
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HHWIL |
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| 3 |
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| 4 | 3 |
HSTROBE† |
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HCS |
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| 15 |
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| 15 |
| 7 | 9 |
| 16 | 9 |
HD[15:0] (output) |
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5 | 1st halfword |
| 8 | 2nd halfword | 5 |
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| 17 | ||
HRDY (case 1) |
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| 6 |
| 8 |
| 5 |
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| 17 | ||
HRDY (case 2) |
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†HSTROBE refers to the following logical operation on HCS, HDS1, and HDS2: [NOT(HDS1 XOR HDS2)] OR HCS.
Figure 42. HPI Read Timing (HAS Not Used, Tied High)
HAS† |
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10 | 19 |
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| 19 |
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11 |
| 10 | 11 |
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HCNTL[1:0] |
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10 | 11 |
| 10 | 11 |
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HR/W |
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| 11 |
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| 11 |
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10 |
| 10 |
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HHWIL |
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| 3 |
| 4 |
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HSTROBE‡ |
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| 18 |
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HCS | 18 |
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| 15 |
| 15 |
7 |
| 9 | 16 | 9 |
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HD[15:0] (output) |
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5 | 1st | 8 | 2nd | 17 | 5 |
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HRDY (case 1) |
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| 8 |
| 17 | 5 |
HRDY (case 2) |
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†For correct operation, strobe the HAS signal only once per HSTROBE active cycle.
‡HSTROBE refers to the following logical operation on HCS, HDS1, and HDS2: [NOT(HDS1 XOR HDS2)] OR HCS.
Figure 43. HPI Read Timing (HAS Used)
POST OFFICE BOX 1443 • HOUSTON, TEXAS 77251−1443 | 89 |