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SIG40 Datasheet(PDF) 11 Page - Yamar Electronics Ltd. |
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SIG40 Datasheet(HTML) 11 Page - Yamar Electronics Ltd. |
11 / 12 page Proprietary and Confidential Information of YAMAR Electronics Ltd. @ 2007 Yamar Electronics Ltd. 11 DS-SIG40 R1.8 Figure 4.6 - Wakeup from Wake 4.6.4 Wakeup from bus message During Sleep mode, the device wakes up periodically to check for activity on the bus every 32 mSec. If a wakeup message is detected, the device enters Standby mode and raises pin INH. The device then signals the host by lowering pin HDO for a minimal duration of 8 bits, and a maximal duration of about 150mSec. The host has to raise nSleep pin (otherwise the device will remain in Standby mode). After completing the reception, the device enters Normal mode. See Figure 4.7 for signals description. Figure 4.7 - Wakeup from bus message 4.7 Timing Characteristic Symbol Figure Characteristics Min Max T1 4.3,4.4 Drop of HDC to drop of HDI 200nS T2 4.3 Raise of HDC to drop of HDI 200nS T3 4.3 Command stop bit to raise of HDC Half bit rate T4 Drop of nSleep to drop of INH 30uS 62uS T5 4.5 Raise of nSleep to raise of INH 30uS 62uS T6 4.6 Transact on Wake to raise of INH 30uS 62uS T7 4.5 Raise of nSleep to drop of HDO 92uS 124uS T8 4.6 Transact on Wake to drop of HDO 92uS 124uS Power Up or Reset to Normal mode 6mS nSleep INH msg. detected DC-BUS Wakeup Message Normal HDO Standby INH Wake Normal mode DC-BUS Wakeup Message Standby nSleep HDO T6 T8 |
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