Summary of Contents for Seiko Epson RTC-4553AC
- Page 1 MQ342-01 Application Manua Real Time Clock Module RTC-4553AC Downloaded from Elcodis.com electronic components distributor...
- Page 2 • Seiko Epson reserves the right to make changes to this material without notice. • Seiko Epson does not assume any liability of any kind arising out of any inaccuracies contained in this material or due to its application or use in any product or circuit and, further, there is no representation that this material is applicable to products requiring high level reliability, such as, medical products.
-
Page 3: Table Of Contents
RTC – 4553AC CONTETS 1. Overview..................1 2. Block Diagram .................1 3. Terminal description ................2 3.1. Terminal connections ..................2 3.2. Terminal functions..................... 2 4. Absolute maximum ratings...............3 5. Recommended operating conditions..........3 6. Frequency characteristics..............3 7. Electrical characteristics ..............4 7.1. DC, AC Characteristics ..................4 7.1.1. -
Page 4: Overview
RTC – 4553AC Real-Time Clock Module RTC – 4553AC • Designed for E-mater • Built-in 32.768 kHz quartz crystal allows adjustment- free operation and assures high accuracy • Integrated clock (hours, minutes, seconds) and calendar (year, month, day, day of the week) counter •... -
Page 5: Terminal Description
RTC – 4553AC 3. Terminal description 3.1. Terminal connections RTC - 4553 TPOUT SOP - 14 pin 3.2. Terminal functions Signal designation Input Pin No. Function / Output — Power supply negative pin. Connect to ground. Address and data are written at WR = "L". Counter data (second digit to year digit) are written using the incrementing method. -
Page 6: Absolute Maximum Ratings
RTC – 4553AC 4. Absolute maximum ratings GND=0 V Item Symbol Condition (pin) Min. Max. Unit −GND −0.3 Power supply voltage +6.0 −0.3 Input voltage , SCK , WR , CS0 , CS1 +0.3 −0.3 Output voltage , TP +0.3 −55 Storage temperature Stored bare product after unpacking... -
Page 7: Electrical Characteristics
RTC – 4553AC 7. Electrical characteristics 7.1. DC, AC Characteristics 7.1.1. V = 5 V ( GND=0 V , Ta = −30 °C ∼ +70 °C ) (1) DC Characteristics = 5 V ± 10 % Item Symbol Condition Unit Min. -
Page 8: Vdd = 3 V
RTC – 4553AC 7.1.2. V = 3 V ( GND=0 V , Ta = −30 °C ∼ +70 °C ) (1) DC Characteristics = 3 V ±10 % Item Symbol Condition Unit Min. Typ. Max. Data retention — — voltage SCK = 300 kHz —... -
Page 9: Timing Chart
RTC – 4553AC 7.2. Timing Chart 90 % 10 % 90 % 10 % WCKL WCKH 90 % 10 % 90 % 10 % DSZ2 DSZ1 90 % 10 % 90 % 10 % 90 % 10 % 90 % 10 % DPZ2 DPZ1... -
Page 10: How To Use
RTC – 4553AC 8. How to use 8.1. Registers 8.1.1. Register Table MODE 2 (User RAM register 2) Address User RAM register A3 A2 A1 A0 MODE 1 (User RAM register 1) Address User RAM register A3 A2 A1 A0 RA3 RA2 RA1 MODE 0 Address... -
Page 11: Register Bit Functions
RTC – 4553AC 8.1.2. Register Bit Functions Bit name Function Bit marked "0" Unused bit that cannot be written. Always read as "0". Second to year digit BCD code. Data are written using increment method. "1" indicates PM and "0" indicates AM. This bit can be read also when 24-hour format is PM/ AM selected (24/12=1). -
Page 12: Register Description
RTC – 4553AC 8.2. Register Description 8.2.1. Time/Calendar Counter Registers · In normal mode (CNTR = "0"), the counter is incremented by a write operation. (1) Second digit counter Counts values from 0 to 59. The counter can be read and incremented. When the second digit counter is incremented, fractions below full seconds are reset. -
Page 13: Control Registers
RTC – 4553AC 8.2.2. Control Registers (1) Control register 1 Name Register contents CNT 1 30ADJ CNTR 24/12 Control register 1 Control register 1 performs 12-hour/24-hour display format switching, digit counter reset, 30 second adjustment, and timing pulse signal switching. The register allows data read and write. (a) TPS bit (D3) The TPS bit selects the timing pulse output waveform. - Page 14 RTC – 4553AC (2) Control register 2 Name Register contents ∗ CNT 2 BUSY PONC — Control register 2 Control register 2 provides flags for carry detect and power-on-clear detect. (a) BUSY bit (D3) The BUSY bit serves for time/calendar counter digit carry detection. BUSY bit Mode Meaning...
-
Page 15: How To Use
RTC – 4553AC 8.3. How to use 8.3.1. Data Read When CS0 is "L", the serial address data input at S is read at the leading edge of SCK . Next, when WR = "H" is taken in on the 8th pulse leading edge of SCK the counter control register or RAM address is selected. -
Page 16: Sample Operation Flow Charts
RTC – 4553AC 8.3.5. Sample Operation Flow Charts (1) Time/calendar initialize example (Example for initialization through power-on-clear when battery was changed etc.) START SYSR ← 1 • Release PONC bit = "1" (1 → 0) • While BUSY = "1", a carry operation is in progress and the setting should not be carried out. - Page 17 RTC – 4553AC (3) Time/calendar modify example using (4) RAM write example counter reset (8:00 → 2:00) START START ="0", MS ="0" ←0 Set MODE 1 ←1 BUSY = 0? Write to RAM in MODE 1 CNTR ←1 ←1 Set MODE 2 ←1 ( 8 →...
-
Page 18: Cs1 And Cs0 Operation
RTC – 4553AC (7) Time/calendar read example using BUSY bit down transition START ←0 ←0 PONC=0? If PONC = "1", initialization was carried out and data must be set again BUSY = 1? PONC=0? Read time/calendar Time and calendar read interval is 996 ms. 8.3.6. -
Page 19: Power-On Reset
RTC – 4553AC 8.3.9. Power-On Reset When the system power is turned on, the power-on reset function operates automatically, performing a sequence identical to system reset. However, because the PONC bit remains at "1", a system reset must be performed to set the PONC bit to "0" before setting the time and calendar. The conditions for power-on reset and the conditions for data retention and normal IC operation during power fluctuation are shown below. -
Page 20: Processing Of Non-Existent Data
RTC – 4553AC 8.3.11. Processing of Non-Existent Data (1) If the month digit is incremented while the current setting is January 31, a non-existent setting will result (February 31). Carry from the hour digit will cause this setting to become March 1. Month digit Carry from hour digit incremented... -
Page 21: Timing Charts
RTC – 4553AC 8.3.12. Timing Charts (1) Data readout example Don't care Don't care Don't care 1-second digit address Next address (0000) (10-second digit) (0001) D0 D1 D2 D3 : Undefined 1-second digit Previously accessed address and data 1-second digit data address (0000) ⋅... - Page 22 RTC – 4553AC (3) Time/calendar continuous write example (CNTR=0) Don't care Don't care Don't care Don't care Address Address Address Access 1 (1-second digit) Access 2 (10-second digit) Access 3 (1-minute digit) Address Data Address Data Address Data : Undefined Previously accessed address 1-second digit contents + 1 10-second digit contents + 1...
- Page 23 RTC – 4553AC Additional information When CS0 is "L", the serial address data input at S are read at the leading edge of SCK . Next, when WR = "H" is taken in on the 8th pulse leading edge of SCK ., the counter control register or RAM address is selected, and data are written as shown below.
-
Page 24: External Dimensions / Marking Layout
RTC – 4553AC 9. External dimensions / Marking layout 9.1. External dimensions RTC - 4553 ( SOP-14pin ) • External dimensions • Recommended soldering pattern ± 10.1 0° - 10° ± 5.0 7.4 0.15 1.27 1.27 × 6 = 7.62 0.05 ±... -
Page 25: Reference Data
RTC – 4553AC 10. Reference Data (1) Frequency/temperature characteristics [Calculating the frequency stability] θ = +25 °C Typ. × 10 α = -0.035 × 10 Typ. 1. Frequency/temperature characteristics are approximated according to the following equation. ∆f = α (θ - θ... -
Page 26: Application Notes
RTC – 4553AC 11. Application notes 11.1. Notes on handling This module uses a C-MOS IC to realize low power consumption. Carefully note the following cautions when handling. (1) Static electricity While this module has built-in circuitry designed to protect it against electrostatic discharge, the chip could still be damaged by a large discharge of static electricity. - Page 27 No.1, Temasek Avenue #36-00, Millenia Tower, Singapore 039192 Phone: (65) 337-7911 Fax: (65) 334-2716 - KOREA - SEIKO EPSON CORPORATION KOREA Office 50F, KLI 63 Building,60 Yoido-dong, Youngdeungpo-Ku, Seoul, 150-763, Korea Phone: (82) 2-784-6027 Fax: (82) 2-767-3677 ELECTRONIC DEVICE MARKETING DEPARTMENT...
Need help?
Do you have a question about the RTC-4553AC and is the answer not in the manual?
Questions and answers