Kontron VMP1 with Netbootloader Instrukcja Użytkownika Pobierz pdf (Strona 64)

VMP1 Configuration

ID 26037, Rev. 01Page 4 - 18 ® 2002 PEP Modular Computers GmbH

4.3.6 Real-time Clock

Access to the RTC is effected via the I2C bus. The RTC uses address 0xD0

For more detailed information please refer to the manuals for the

ST - Microelectronics M41T56 and the Motorola MPC 8240 (I2C - Bus).

Meanings of abbreviations in Table 4-24

Table 4-24: Register Map RTC M41T56

Address D7 D6 D5 D4 D3 D2 D1 D0

Function/Range

in BCD Format

0 ST 10 Seconds Seconds Seconds / 00-59

1 X 10 Minutes Minutes Minutes / 00-59

2 CEB CB 10 Hours Hours

Century 0-1/Hour

00-23

3 X X X X X Day Day / 00-07

4 X X 10 Date Date Date / 01-31

5XXX

Month Month / 01-12

6 10 Years Years Year / 00-99

7 OUT FT S Calibraton Control

CEB = Century enable bit

CB = Century bit

FT = Frequency test bit

OUT = Output level

ST = Stop bit

S = Sign bit



Note:

When the RTC has once been stopped due to low voltage, it is

necessary to re-initialize the “Seconds” “Minutes” and “Hours” reg-

isters before it will run again.

1 2 ... 59 60 61 62 63 64 65 66 67 68 69 ... 119 120

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Kontron VMP1 with Netbootloader Instrukcja Użytkownika Strona 64