III PERIPHERAL BLOCK:
| Register name | Address | Bit | Name | Function |
| Setting |
| Init. | R/W | Remarks |
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| 004819C | DF | TC315 |
| 0 to 65535 | X | R |
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| counter data | (HW) | DE | TC314 | TC315 = MSB |
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| X |
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| register |
| DD | TC313 | TC30 = LSB |
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| X |
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| DC | TC312 |
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| X |
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| DB | TC311 |
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| X |
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| DA | TC310 |
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| X |
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| D9 | TC39 |
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| X |
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| D8 | TC38 |
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| X |
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| D7 | TC37 |
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| X |
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| D6 | TC36 |
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| X |
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| D5 | TC35 |
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| X |
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| D4 | TC34 |
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| X |
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| D3 | TC33 |
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| X |
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| D2 | TC32 |
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| X |
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| D1 | TC31 |
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| X |
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| D0 | TC30 |
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| X |
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| 004819E | D7 | – | reserved |
| – |
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| 0 | – | 0 when being read. |
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| control register | (B) | D6 | SELFM3 | 1 | Fine mode |
| 0 | Normal | 0 | R/W |
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| D5 | SELCRB3 | 1 | Enabled |
| 0 | Disabled | 0 | R/W |
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| D4 | OUTINV3 | 1 | Invert |
| 0 | Normal | 0 | R/W |
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| D3 | CKSL3 | 1 | External clock |
| 0 | Internal clock | 0 | R/W |
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| D2 | PTM3 | 1 | On |
| 0 | Off | 0 | R/W |
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| D1 | PRESET3 | 1 | Reset |
| 0 | Invalid | 0 | W | 0 when being read. |
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| D0 | PRUN3 | 1 | Run |
| 0 | Stop | 0 | R/W |
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| 00481A0 | DF | CR4A15 |
| 0 to 65535 | X | R/W |
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| comparison | (HW) | DE | CR4A14 | CR4A15 = MSB |
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| X |
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| data A |
| DD | CR4A13 | CR4A0 = LSB |
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| X |
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| register |
| DC | CR4A12 |
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| X |
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| DB | CR4A11 |
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| X |
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| DA | CR4A10 |
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| X |
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| D9 | CR4A9 |
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| X |
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| D8 | CR4A8 |
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| X |
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| D7 | CR4A7 |
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| X |
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| D6 | CR4A6 |
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| X |
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| D5 | CR4A5 |
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| X |
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| D4 | CR4A4 |
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| X |
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| D3 | CR4A3 |
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| X |
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| D2 | CR4A2 |
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| X |
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| D1 | CR4A1 |
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| X |
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| D0 | CR4A0 |
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| X |
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| 00481A2 | DF | CR4B15 |
| 0 to 65535 | X | R/W |
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| comparison | (HW) | DE | CR4B14 | CR4B15 = MSB |
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| X |
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| data B |
| DD | CR4B13 | CR4B0 = LSB |
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| X |
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| register |
| DC | CR4B12 |
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| X |
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| DB | CR4B11 |
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| X |
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| DA | CR4B10 |
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| X |
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| D9 | CR4B9 |
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| X |
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| D8 | CR4B8 |
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| X |
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| D7 | CR4B7 |
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| X |
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| D6 | CR4B6 |
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| X |
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| D5 | CR4B5 |
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| X |
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| D4 | CR4B4 |
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| X |
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| D3 | CR4B3 |
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| X |
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| D2 | CR4B2 |
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| X |
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| D1 | CR4B1 |
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| X |
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| D0 | CR4B0 |
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| X |
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| 00481A4 | DF | TC415 |
| 0 to 65535 | X | R |
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| counter data | (HW) | DE | TC414 | TC415 = MSB |
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| X |
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| register |
| DD | TC413 | TC40 = LSB |
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| X |
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| DC | TC412 |
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| X |
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| DB | TC411 |
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| X |
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| DA | TC410 |
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| X |
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| D9 | TC49 |
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| X |
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| D8 | TC48 |
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| X |
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| D7 | TC47 |
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| X |
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| D6 | TC46 |
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| X |
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| D5 | TC45 |
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| X |
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| D4 | TC44 |
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| X |
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| D3 | TC43 |
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| X |
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| D2 | TC42 |
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| X |
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| D1 | TC41 |
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| X |
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| D0 | TC40 |
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| X |
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S1C33210 FUNCTION PART | EPSON |