TEMPCOMPRTC-RD Datasheet TEMPCOMPRTC-RD | P10-P12

TEMPCOMPRTC-RD

10 Rev. 0.1

8. Bill of Materials

Item Qty Reference Value Type Manufacturer P/N Footprint

1 13 C1,C2,C4,C6,C10

C12,C13,C14,C15

C16,C17,C18,C19

0u1F X7R AVX 0805YC104MAT2A 0805

2 2 C11,C20 1u0F X7R AVX 0805YC105MAT2A 0805

3 1 C3 1000uF/16V Electrolit SANYO 16MV1000FA CAPMV-FA_10_125

4 1 C7 33uT/25V Tantalum Vishay 293D336X9025D2T Case-D

5 1 C5 2u2F X7R 0805YC225MAT2A 0805

6 2 C8,C9 18pF NPO AVX 0805YA180MAT2A 0805

7 1 D1 B140 Diodes Inc. B140 SMA

8 1 D2 Red Kingbright L-7104EC LED_3mm

9 1 D3 Green 2mA Kingbright L-934LGD LED_3mm

10 1 J1 HEADER 6X2 Weitronics 144-11-012-10-10 HED6x2

11 1 J2 HEADER 2 Weitronics 143-11-002-10-10 HED2

12 1 J3 HEADER4X2 Weitronics 144-11-008-10-10 HED4x2

13 1 J4 Box 10pin Molex 87256-1011 BOX5x2

14 1 J5 DB9 Female RA D-Type Kycon K22-E9S-NJ d_type_9P

15 1 J6 DB25Female RA D-Type Kycon K22-E25S-NJ d_type_25P

16 1 P1 PHONEJACK Kycon RTC Commp CONPWR

17 2 R2,R23 2R AVX CR-21-200J-T 0805

18 2 R4,R5 100R AVX CR-21-101J-T 0805

19 1 R3 470R AVX CR-21-471J-T 0805

20 3 R10,R14,R15 1K AVX CR-21-102J-T 0805

21 1 R16 100K AVX CR-21-105J-T 0805

22 6 R8,R9,R11,R12,R

21,R22

10K AVX CR-21-104J-T 0805

23 1 R13 10M AVX CR-21-107J-T 0805

24 1 R17 750R AVX CR-21-751J-T 0805

25 1 R18 4K75 AVX CR-21-4751J-T 0805

26 2 R19,R20 33R YAGEO RC2512-330 2512

27 2 SW1,SW2 PUSHBUTTON Bourns SDTX-610 PB-TC0112

28 6 TP31,TP33,TP36,

TP37,TP41,TP53

Test point SMT Keystone 5015 SMT-TP

29 1 U1 L4931CD33 STG L4931CD33 SO-8

30 1 U3 C8051F300 Silicon Labs C8051F300 QFN-11

31 1 U4 74LCX07 National LM339 SO-14

32 1 U5 MAX3224 Maxim MAX3224E SSOP-20

33 1 Y1 32.768 kHz Gollege SM26F-A GWX-38

TEMPCOMPRTC-RD

Rev. 0.1 11

APPENDIX A—TC-RTC: SUPPORTED COMMANDS

TC-RTC Firmware with UART Interface

The TC-RTC firmware with UART interface supports a set of commands to read/write date and time. The

supported commands along with explanations are listed below:

 s – Toggles auto-display mode that displays time once every second.

 r xx yy – Read yy bytes starting at address xx.

 w xx yy data – Write yy bytes starting at address xx.

Notes:

1. The commands are case-sensitive. Only lower-case letters are accepted.

2. The addresses should be in decimal format (e.g., address 0x1F is entered as 31).

3. See “Appendix B—TC-RTC: Implementation Details” for information on how the RTC register data is formatted.

Write Command Examples

 Date/Time: 11:05:39 AM, Saturday, December, 08, 1979→39 05 51 06 08 12 79

w000739055106081279

 Time: 21: 48: 22→22 48 21

w0003224821

 Day: Tuesday→02

w030102

 NVRAM data write: 01 02 03 starting at address 0x1F (31)→31 01 02 03

w3103010203

Read Command Examples

 Date/Time: r0007

 NVRAM (all 56 bytes): r0856

 NVRAM (4 bytes starting at address 26): r2604

TC-RTC Firmware with SMBus Interface

The TC-RTC firmware with the SMBus interface implements a SMBus Slave device with a Slave Address of 0xD0.

The device operates in one of two modes: Slave Receiver Mode or Slave Transmitter Mode. In Slave Receiver

Mode, it receives address and data from the Master and writes it to the RTC or NVRAM registers. In Slave

Transmitter Mode, it sends data from the RTC or NVRAM registers to the Master. Refer to "AN293: Temperature

Compensated Real Time Clock Reference Design Programmer's Guide" for more details on the SMBus interface

implementation.

TEMPCOMPRTC-RD

12 Rev. 0.1

APPENDIX B—TC-RTC: IMPLEMENTATION DETAILS

UART Communication Parameters

 Baud rate: 9600 bps

 Data format: 8 data bits, 1 stop bit, no parity

 Flow control: None

RTC and NVRAM Registers—Data Format

Figure 10. RTC and NVRAM Registers—Data Format

Notes:

1. The contents of the time and calendar registers are in binary coded decimal (BCD) format.

2. The Clock Halt (CH) bit, when set to zero, will disable the RTC.

3. The 12/24 bit selects 12-hour mode if set to one.

4. In 12-hour mode, the AM/PM bit selects “PM” if set to one. In 24-hour mode, this bit is the second 10-hour bit (20-23

hours).

Seconds

Minutes

Hours

Day of Week

Date

Month

Year

Control (Reserved)

NVRAM

56 x 8

00H

01H

02H

03H

04H

05H

06H

07H

08H

3FH

Address

Bit7 Bit6 Bit5 Bit4 Bit3 Bit2 Bit1 Bit0

000

A/P

12 /

Range

00-59

01-31

1-7

01-12

00-99

01-12

01-23

(Stored in non-volatile Flash Memory)

P1-P3 P4-P6 P7-P9 P10-P12 P13-P14

TEMPCOMPRTC-RD

Mfr. #:

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Manufacturer:

Silicon Labs

Description:

Development Boards & Kits - 8051 Temperature compensated RTC Reference Design

Lifecycle:

New from this manufacturer.

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