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S-7760A00XX-HCT1 Datasheet(PDF) 14 Page - Seiko Instruments Inc |
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S-7760A00XX-HCT1 Datasheet(HTML) 14 Page - Seiko Instruments Inc |
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14 / 53 page  PROGRAMMABLE PORT CONTROLLER (PORT EXPANDER WITH BUILT-IN E2PROM CIRCUIT) S-7760A Rev.1.3_00 Seiko Instruments Inc. 14 4. Control port register Control port register is an 8-bit register. Users can set output data which is from output ports (DO7 to 0). If data is “1”, output is “H”, and if it is “0”, output is “L”. This register is the one to be reloaded. Data in this register does not change even if output from the port is inverted by timer action. B7 LSB CTR7 CTR6 CTR5 CTR4 CTR3 MSB B6 B5 B4 B3 B2 B1 B0 CTR2 CTR1 CTR0 R / W R / W R / W R / W R / W R / W R / W R / W Figure 15 Control Port Register 5. Timer scale setting register The lower 4 bits are registers for timer scale setting. Users can set, whether short-time or long-time, time reference (scale) for the delay time setting at each port DO3 to 0. The higher 4 bits are Read/Write-able bits, however, they do not affect on circuit action because DO7 to 4 have fixed output. This register is the one to be reloaded. B7 LSB TS7 TS6 TS5 TS4 TS3 MSB B6 B5 B4 B3 B2 B1 B0 TS2 TS1 TS0 R / W R / W R / W R / W R / W R / W R / W R / W TSn = 1 : Timer scale DO3 to 0 Short-time setting TSn = 0 : Timer scale DO3 to 0 Long-time setting Figure 16 Timer Scale Setting Register |
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