DS7505U+T&R【PDF 12/14 页】IC DGTL THERMOMETER 2WIRE 8-USOP

收藏本站

您好，
买卖IC网欢迎您。
请登录
免费注册

买卖IC网

Sheet目录40

8页 9页 10页 11页 [12页]13页 14页

Copy Data [48h]

0100 1000

Copies data from all SRAM shadow registers to

EEPROM. It is recommended that a Copy Data com-

mand be performed after writing EEPROM-backed

memory locations to guarantee data integrity in the

event of a power loss. The master sends a START fol-

lowed by an address byte containing the DS7505 bus

address. The R/W bit must be a 0. The DS7505

responds with an ACK. If the next byte is a 0x48, the

DS7505 copies all Shadow RAM locations in EEPROM

memory.

Software POR [54h]

0101 0100

The master sends a START followed by an address

byte containing the DS7505 bus address. The R/W bit

must be a 0. The DS7505 responds with an ACK. If the

next byte is a 0x54, the DS7505 resets as if power had

been cycled, which stops temperature conversions and

resets all registers to their power-up states. No ACK is

sent by the IC after the POR command is received.

Afterwards, the DS7505 makes a single temperature

conversion or continuous temperature conversions,

depending on the state of the SD bit.

Digital Thermometer and Thermostat

12 ______________________________________________________________________________________

SCL

START

ADDRESS BYTE

A) READ 2 BYTES FROM THE TEMPERATURE, T

, OR T

HYST

SDA S 1 0 0 1 A2 A1 A0 R A

D7 D6 D5 D4 D3 D2 D1 D0

MS DATA BYTE

(FROM SLAVE)

LS DATA BYTE

(FROM SLAVE)

ACK

(SLAVE)

ACK

(MASTER)

NACK

(MASTER)

STOP

SCL

START

ADDRESS BYTE

E) READ FROM THE CONFIGURATION REGISTER (CURRENT POINTER LOCATION)

SDA S 1 0 0 1 A2 A1 A0 R A

D7 D6 D5 D4 D3 D2 D1 D0

MS DATA BYTE

(FROM SLAVE)

ACK

(SLAVE)

NACK

(MASTER)

STOP

SCL

START

ADDRESS BYTE

B) WRITE TO THE CONFIGURATION REGISTER

SDA S 1 0 0 1 A2 A1 A0 W A

0 0 0 0 0 0 0 1

D7 D6 D5 D4 D3 D2 D1 D0

POINTER BYTE

DATA BYTE

(FROM MASTER)

ACK

(SLAVE)

ACK

(SLAVE)

ACK

(SLAVE)

STOP

SCL

START

ADDRESS BYTE

C) WRITE TO THE T

OR T

HYST

SDA S 1 0 0 1 A2 A1 A0 W A

0 0 0 0 0 0 P1 P0

D7 D6 D5 D4 D3 D2 D1 D0

POINTER BYTE

MS DATA BYTE

(FROM MASTER)

ACK

(SLAVE)

ACK

(SLAVE)

D7 D6 D5 D4 D3 D2 D1

LS DATA BYTE

(FROM MASTER)

ACK

(SLAVE)

ACK

(SLAVE)

STOP

SCL

START

ADDRESS BYTE

D) READ SINGLE BYTE (NEW POINTER LOCATION)

SDA S 1 0 0 1 A2 A1 A0 W A

A S

0 0 0 0 0 0 P1 P0

1 0 0 1 A2 A1 A0

POINTER BYTE

ADDRESS BYTE

ACK

(SLAVE)

ACK

(SLAVE)

REPEAT

START

R A

D7 D6 D5 D4 D3 D2 D1 D0

DATA BYTE

(FROM SLAVE)

ACK

(SLAVE)

NACK

(MASTER)

STOP

Figure 9. 2-Wire Interface Timing

发布紧急采购，3分钟左右您将得到回复。

采购需求

(若只采购一条型号，填写一行即可)

*型号	*数量	厂商	批号	封装

添加更多采购

采购需求

发布成功！您可以继续发布采购。也可以进入我的后台，查看报价

发布成功！您可以继续发布采购。也可以进入我的后台，查看报价

我的联系方式