... nsR/W Setup Time Before DS/EtRWS50 nsChip Select Setup Time BeforeDS, WR , or RDtCS20 nsChip Select Hold Time tCH0nsRead Data Hold Time tDHR10 80 nsWrite Data Hold Time tDHW0nsMux’ed ... Address Valid Time toALE FalltASL30 nsMused Address Hold Time toALE FalltAHL10 nsDelay Time DS/E to AS/ALERisetASD20 nsPulse Width AS/ALE High PWASH60 nsDelay Time, AS/ALE to ... read-only.DS12C887 REAL TIME CLOCK ADDRESS MAP Figure 2DS12C8876 of 19 TIME, CALENDAR AND ALARM LOCATIONSThe time and calendar information is obtained by reading the appropriate memory bytes. The time, calendar,...