Руководство по эксплуатации УЛС Кристалл-22М
.pdf19. (+UP(V))
, ,
5 , +Up(V) 5 , .
, RP SA 5 ,
3.3 5 . +Up(V), 3.3
5 RP SA, , -
. ,
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20. (ATERM) |
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ATerm – TC1047A - |
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Vo : |
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- 40 … +125°C |
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2°C |
DA1 |
R1 |
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100 |
20.1 – .
VO .
20.2 – VO .
, : T=((Vo/0.01)-0.5)
Vo=ADRES*(UREF/2n),
ADRES – , ; UREV – ;
n – .
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, UREV=5 10 , 2n=1024, Vo=ADRES*0.0048828125.
10 T=(ADRES*0.48828125-50)
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21. I2C (I2C)
I2C, -
RTC ( ), DTerm
EEPROM. I2C -
. CS -
SCL SDA CS=0. ,
I2C SPI,
CS
.
21.1
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SCL |
In |
I2C |
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SDA |
In/Out |
I2C |
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CS |
In |
I2C |
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21.1. I2C
PHILIPS -
(InterIntegrated Circuit ). I2C -
, ,
. -
I2C. : -
EEPROM 24Cxxx, , ,
(I2C<>SPI, I2C<>1-Wire), , , RTC .
, , -
I2C.
, SCL SDA. SCL -
( lock Line). ,
I2C . SDA - (Data). SCL SDA
I2C .
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21.1 – I2C.
, , -
.
. . SCL
(master), -
, (slave) -
SCL , .
1k8 (1,8 ) 47k (47 ). 1k8, 4k7 10k - ,
. 4k7,
.
, , 100 .
FAST – 400 HIGH – 3,4 . ,
, .
– 22 » I2C. -
21.1.
1.DS1621 – (SCL = 400 )
2.DS1307 – (RTC, SCL = 100 )
3.AT24C512 – EEPROM 64 (SCL = 1 ).
I2C 7- -
. I2C 127 . 0 ( ) -
.
10- , -
, , .
I2C , -
I2C. , -
( 21.2).
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21.2 – .
, 7-
(R/W, ). R/W = 0,
, , R/W = 1,
.
SDA SCL = 0.
21.3 – .
, . -
(ACK = 0).
21.4 – DS1307.
,
: ,
1(NACK = 1).
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21.5 – DS1307.
«
», .
,
I2C, ,
1..
2..
3..
4.ACK.
5.NACK.
I2C -
.
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22. (DS1307)
DS1307 , 2100
I2C. 32,768
64 . 0 0x3F.
: -
5 3 . 500 .
, -
( ).
, DS1621,
, .
22.1 – DS1307.
22.1
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1 |
X1 |
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1 |
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2 |
X2 |
- |
2 |
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3 |
Vbat |
- |
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4 |
Vss |
- |
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5 |
SDA |
IN/OUT |
I2C |
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6 |
SCL |
IN |
I2C |
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7 |
SQW/OUT |
OUT |
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8 |
Vdd |
- |
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8 RTC. 56 -
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BIT7 |
BIT6 |
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BIT5 |
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BIT4 |
BIT3 |
BIT2 |
BIT1 |
BIT0 |
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00h |
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00h |
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00-59 |
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SECONDS |
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CH |
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10 SECONDS |
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SECONDS |
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MINUTES |
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× |
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10 MINUTES |
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MINUTES |
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00-59 |
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HOURS |
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× |
12 |
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10 HR |
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10 HR |
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HOURS |
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01-12 |
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24 |
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A/P |
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00-23 |
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DAY |
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× |
× |
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× |
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× |
× |
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DAY |
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1-7 |
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DATE |
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× |
× |
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10 |
DATE |
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DATE |
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01-28/29 |
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01-30 |
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01-31 |
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MONTH |
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× |
× |
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× |
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10 |
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MONTH |
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01-12 |
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MONTH |
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00-99 |
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07h |
YEAR |
07h |
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10 YEAR |
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YEAR |
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CONTROL |
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OUT |
× |
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× |
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SQWE |
× |
× |
RS1 |
RS0 |
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08h |
RAM |
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3Fh |
56×8 |
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22.2 – DS1307. |
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11010000.
CONTROL( 7h) SQW/OUT.
SQWE SQW/OUT.
(SQWE ) OUT.
SQW/OUT , -
, SQWE, RS1:RS0:
22.2
RS1 |
RS0 |
SQW |
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0 |
0 |
1 |
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0 |
1 |
4,096 |
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1 |
0 |
8,192 |
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1 |
1 |
32,768 |
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RTC , -
, 45 ,
0 01 0 45. RTC, CH -
( 0 00).
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23. (DS1621)
DS1621 -
I2C. Tout.
7 |
A0 |
DTerm |
SDA |
1 |
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6 |
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2 |
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A1 |
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SCL |
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5 |
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8 |
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A2 |
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Vdd |
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3 |
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4 |
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Tout |
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Vss |
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23.1 – .
DS1621 -5
+125 . 0,5 .
I2C. 1001 A2 A1 A0, Ax – -
A2 A1 A0. A2 -
, A1 , A0 ,
10011010. . -
, I2C 1 . -
10010000.
23.1
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1 |
SDA |
IN/OUT |
I2C |
2 |
SCL |
OUT |
I2C |
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3 |
Tout |
OUT |
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4 |
Vss |
- |
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5 |
A2 |
IN |
2 7- |
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6 |
A1 |
IN |
1 7- |
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7 |
A0 |
IN |
0 7- |
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8 |
Vdd |
- |
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9-
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