| Table 3. Control Register Mode Definition Format |
| Bit | Description |
| O | Port C (lower) l/0 direction: 1 = input 0 = output |
| 1 | Port B l/0 direction: 1 = input 0 = output |
| 2 | Group B mode select: 1 = mode 1 0 = mode 0 |
| 3 | Port C (upper) l/0 direction: 1 = input 0 = output |
| 4 | Port A l/0 direction: 1 = input 0 = output |
| 65 | Group A mode select: 00 = mode 0 01 = mode 1 1X = mode 2, Note ( /) |
| 7 | 1 when writing = mode definition format Always l when reading the control register |
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