DS1685-3_12 MAXIM [Maxim Integrated Products], DS1685-3_12 Datasheet - Page 23
DS1685-3_12
Manufacturer Part Number
DS1685-3_12
Description
3V/5V Real-Time Clocks
Manufacturer
MAXIM [Maxim Integrated Products]
Datasheet
1.DS1685-3_12.pdf
(34 pages)
- Current page: 23 of 34
- Download datasheet (655Kb)
The RTC address is latched on the falling edge of the ALE signal. Each time an RTC address is latched, the
register address stack is pushed. The stack is only four registers deep, holding the three previous RTC addresses
in addition to the current RTC address being accessed. The following waveform illustrates how the BIOS could
recover the RTC address when an SMI occurs.
1) The RTC address is latched.
2) An SMI is generated before an RTC read or write occurs.
3) RTC address 0Ah is latched and the address from 1 is pushed to the RTC Address-1 stack location. This step
4) RTC address 4Eh is latched and the address from “1” is pushed to location “4Eh,” “RTC Address-2” while 0Ah
ALE
is necessary to change the bank select bit, DV0 = 1.
is pushed to the “RTC Address-1” location. The data in this register, 4Eh, is the RTC address lost due to the
SMI.
1
2
23 of 34
3
4
Related parts for DS1685-3_12
Image
Part Number
Description
Manufacturer
Datasheet
Request
R
Part Number:
Description:
IC RTC 5V 64-BIT Y2KC 24-DIP
Manufacturer:
Maxim Integrated Products
Datasheet:
Part Number:
Description:
IC RTC 3V 64-BIT Y2KC 24-DIP
Manufacturer:
Maxim Integrated Products
Datasheet:
Part Number:
Description:
Real Time Clock
Manufacturer:
Maxim Integrated Products
Datasheet:
Part Number:
Description:
IC RTC 5V 64-BIT Y2KC 24-DIP
Manufacturer:
Maxim Integrated Products
Datasheet:
Part Number:
Description:
IC RTC 3V 64-BIT Y2KC 24-DIP
Manufacturer:
Maxim Integrated Products
Datasheet:
Part Number:
Description:
IC RTC 5V 64-BIT Y2K 24-DIP
Manufacturer:
Maxim Integrated Products
Datasheet:
Part Number:
Description:
LCC/M/CIRCUITI INTEGRATI MAXIM
Manufacturer:
Maxim Integrated Products
Datasheet:
Part Number:
Description:
KIT/E/MAXIM ANALOG ESSENTIALS # COLLECTION OF PLUG-IN EVALUATION MODULES
Manufacturer:
Maxim Integrated Products
Part Number:
Description:
Single +5V, fully integrated, 1.25Gbps laser diode driver.
Manufacturer:
Maxim Integrated Products
Datasheet:
Part Number:
Description:
Single +5V, fully integrated, 155Mbps laser diode driver.
Manufacturer:
Maxim Integrated Products
Datasheet:
Part Number:
Description:
VRD11/VRD10, K8 Rev F 2/3/4-Phase PWM Controllers with Integrated Dual MOSFET Drivers
Manufacturer:
Maxim Integrated Products
Datasheet:
Part Number:
Description:
Highly Integrated Level 2 SMBus Battery Chargers
Manufacturer:
Maxim Integrated Products
Datasheet:
Part Number:
Description:
Current Monitor and Accumulator with Integrated Sense Resistor; ; Temperature Range: -40°C to +85°C
Manufacturer:
Maxim Integrated Products
Part Number:
Description:
TSSOP 14/A/RS-485 Transceivers with Integrated 100O/120O Termination Resis
Manufacturer:
Maxim Integrated Products
Part Number:
Description:
TSSOP 14/A/RS-485 Transceivers with Integrated 100O/120O Termination Resis
Manufacturer:
Maxim Integrated Products