4 PERIPHERAL CIRCUITS
Register name | Address | Bit | Name | Function |
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| Setting |
| Init. | R/W | Remarks | ||||
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SDRAM | 039FFC5 | SDRTRCD1 | SDRAM tRCD spec | SDRTRCD[1:0] | Number of clocks | 0 | R/W |
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timing | (B) |
| SDRTRCD0 |
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| 1 |
| 1 |
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| 3 | 0 |
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register 2 |
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| 1 |
| 0 |
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| 2 |
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| 0 |
| 1 |
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| 1 |
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| 0 |
| 0 |
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| 4 |
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| D5 | SDRTRSC | SDRAM tRSC spec | 1 |
| 1 clock |
| 0 |
| 2 clocks | 0 | R/W |
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| SDRTRRD1 | SDRAM tRRD spec | SDRTRRD[1:0] | Number of clocks | 0 | R/W |
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| SDRTRRD0 |
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| 1 |
| 1 |
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| 3 | 0 |
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| 1 |
| 0 |
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| 2 |
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| 0 |
| 1 |
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| 1 |
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| 0 |
| 0 |
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| 4 |
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| – | reserved |
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| – |
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| – | – | 0 when being read. | ||
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SDRAM | 039FFC6 | – | reserved |
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| – |
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| – | – | 0 when being read. | ||
auto refresh | (HW) | DB | SDRARFC11 | SDRAM auto refresh count [11:0] |
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| 0 to 4096 | 1 | R/W |
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count register |
| DA | SDRARFC10 |
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| 1 |
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| D9 | SDRARFC9 |
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| 1 |
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| D8 | SDRARFC8 |
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| 1 |
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| D7 | SDRARFC7 |
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| 1 |
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| D6 | SDRARFC6 |
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| 1 |
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| D5 | SDRARFC5 |
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| 1 |
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| D4 | SDRARFC4 |
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| 1 |
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| D3 | SDRARFC3 |
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| 1 |
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| D2 | SDRARFC2 |
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| 1 |
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| D1 | SDRARFC1 |
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| 1 |
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| D0 | SDRARFC0 |
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| 1 |
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SDRAM | 039FFC8 | – | reserved |
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| – |
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| – | – | 0 when being read. | ||
self refresh | (B) | D3 | SDRSRFC3 | SDRAM self refresh count [3:0] |
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| 2 to 15 |
| 1 | R/W | This register must | ||||
count register |
| D2 | SDRSRFC2 |
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| 1 |
| not be set less than |
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| D1 | SDRSRFC1 |
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| 1 |
| "0x02". |
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| D0 | SDRSRFC0 |
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| 1 |
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SDRAM | 039FFC9 | D7 | – | reserved |
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| – |
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| – | – | 0 when being read. | |
advanced | (B) | D6 | SDRSZ | SDRAM data path bit width | 1 |
| 8 bits |
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| 0 |
| 16 bits | 0 | R/W |
| |
control |
| D5 | SDRBI | SDRAM bank interleaved access | 1 |
| Interleaved |
| 0 |
| One bank | 0 | R/W |
| |||
register |
| – | reserved |
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| – |
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| – | – | 0 when being read. | ||
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SDRAM | 039FFCA | D7 | SDRMRS | SDRAM mode register set flag | 1 |
| Not finished |
| 0 |
| Done | 1 | R |
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status register | (B) | D6 | SDRSRM | SDRAM current refresh mode | 1 |
| Auto refresh |
| 0 |
| Self refresh | 1 | R |
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| – | reserved |
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| – |
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| – | – | 0 when being read. |
EPSON | S1C33L03 PRODUCT PART |