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S-7760A00XX-HCT1 Datasheet(PDF) 18 Page - Seiko Instruments Inc |
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S-7760A00XX-HCT1 Datasheet(HTML) 18 Page - Seiko Instruments Inc |
18 / 53 page ![]() PROGRAMMABLE PORT CONTROLLER (PORT EXPANDER WITH BUILT-IN E2PROM CIRCUIT) S-7760A Rev.1.3_00 Seiko Instruments Inc. 18 Timing of Data Loading from E2PROM and Timer Action The example of timing chart of data loading from the E 2PROM and timer action is shown in Figure 19 and 20. Set VCCH ≥ 2.5 V when rising VCCH and TIMEN simultaneously. Signal of low power supply voltage detection 2.05 V Typ. Oscillation circuit EN DO3 pin (When E 2PROM CTR3 = 0) TIMEN pin Start of timer action by Write in timer enable register Start of timer action by setting TIMEN pin “L” → “H” Start of timer action due to power-on CTR3 register (When E 2PROM CTR3 = 0) *1. A period to define data is; the loading period from E 2PROM + the period to stabilize output from DO7 to 0 pin = within 100 µs. DO2 pin (When E 2PROM CTR2 = 1) CTR2 register (When E 2PROM CTR2 = 1) Reload starts Reload starts Data loading Period to define data *1 Delay time by timer setting with DO3 Time out Time out Time out Power supply voltage VCCH / VCCL Delay time by timer setting with DO2 Delay time by timer setting with DO3 Delay time by timer setting with DO3 Delay time by timer setting with DO2 Delay time by timer setting with DO2 Figure 19 Data Loading and Timer Action Example 1 |
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