STK17TA8-RF45ITR Cypress Semiconductor Corp, STK17TA8-RF45ITR Datasheet - Page 19

• Manufacturer Part Number: STK17TA8-RF45ITR
• Description: IC NVSRAM 1MBIT 45NS 48SSOP
• Manufacturer: Cypress Semiconductor Corp

Specifications of STK17TA8-RF45ITR

• Format - Memory: RAM
• Memory Type: NVSRAM (Non-Volatile SRAM)
• Memory Size: 1M (128K x 8)
• Speed: 45ns
• Interface: Parallel
• Voltage - Supply: 2.7 V ~ 3.6 V
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 48-SSOP
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

Document #: 001-52039 Rev. *A
Register Map Detail
OSCEN
Calibration
Sign
Calibration
0x1FFFD
0x1FFFC
0x1FFFB
0x1FFFF
0x1FFFE
0x1FFFA
0x1FFF9
0x1FFF8
Contains the lower two BCD digits of the year. Lower nibble contains the value for years; upper nibble contains
the value for 10s of years. Each nibble operates from 0 to 9. The range for the register is 0-99.
Contains the BCD digits of the month. Lower nibble contains the lower digit and operates from 0 to 9; upper nibble
(one bit) contains the upper digit and operates from 0 to 1. The range for the register is 1-12.
Contains the BCD digits for the date of the month. Lower nibble contains the lower digit and operates from 0 to 9;
upper nibble contains the upper digit and operates from 0 to 3. The range for the register is 1-31. Leap years are
automatically adjusted for.
Lower nibble contains a value that correlates to day of the week. Day of the week is a ring counter that counts from
1 to 7 then returns to 1. The user must assign meaning to the day value, as the day is not integrated with the date.
Contains the BCD value of hours in 24 hour format. Lower nibble contains the lower digit and operates from 0 to
9; upper nibble (two bits) contains the upper digit and operates from 0 to 2. The range for the register is 0-23.
Contains the BCD value of minutes. Lower nibble contains the lower digit and operates from 0 to 9; upper nibble
contains the upper minutes digit and operates from 0 to 5. The range for the register is 0-59.
Contains the BCD value of seconds. Lower nibble contains the lower digit and operates from 0 to 9; upper nibble
contains the upper digit and operates from 0 to 5. The range for the register is 0-59.
Oscillator Enable. When set to 1, the oscillator is disabled. When set to 0, the oscillator is enabled. Disabling the
oscillator saves battery/capacitor power during storage.
Determines if the calibration adjustment is applied as an addition (1) to or as a subtraction (0) from the time-base.
These five bits control the calibration of the clock.
OSCEN
D7
D7
D7
D7
D7
D7
D7
D7
0
0
0
0
0
0
D6
D6
D6
D6
D6
D6
D6
D6
0
0
0
0
0
10s Years
10s Seconds
10s Minutes
Calibration
Sign
10s Day of month
D5
D5
D5
D5
D5
D5
D5
D5
0
0
10s Hours
Real Time Clock – Seconds
Real Time Clock – Minutes
Real Time Clock – Months
10s Month
Real Time Clock – Hours
Real Time Clock – Years
Real Time Clock – Date
Real Time Clock – Day
D4
D4
D4
D4
D4
D4
D4
D4
0
Calibration
D3
D3
D3
D3
D3
D3
D3
D3
0
Calibration
D2
D2
D2
D2
D2
D2
D2
D2
Day of month
Seconds
Minutes
Months
Hours
Years
Day of week
D1
D1
D1
D1
D1
D1
D1
D1
STK17TA8
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D0
D0
D0
D0
D0
D0
D0
D0
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