參數(shù)資料
型號: 90E23PYGI
廠商: INTEGRATED DEVICE TECHNOLOGY INC
元件分類: 模擬信號調理
英文描述: SPECIALTY ANALOG CIRCUIT, PDSO28
封裝: GREEN, SSOP-28
文件頁數(shù): 9/54頁
文件大?。?/td> 610K
代理商: 90E23PYGI
90E21/22/23/24
SINGLE-PHASE HIGH-PERFORMANCE WIDE-SPAN ENERGY METERING IC
Interface
17
March 22, 2011
4.1.2
THREE-WIRE MODE
In three-wire mode, CS is always at low level. When there is no oper-
ation, SCLK keeps at high level. The start of a read or write operation is
triggered if SCLK is consistently low for at least 400
s. The subsequent
read or write operation is similar to that in four-wire mode. Refer to Fig-
Figure-8 Read Sequence in Three-Wire Mode
Figure-9 Write Sequence in Three-Wire Mode
CS
SCLK
10
12345678
9
11
12
13
14
15
16
17
18
19
20
21
22
23
Register address
24
1234
Low ≥ 400
s
Drive Low
SDI
SDO
A0
A6 A5 A4 A3 A2 A1
Hign Impedance
D
15
Don't care
16-bit data
D
14
D
13
D
12
D
11
D
10
D
9
D
8
D
7
D
6
D
5
D
4
D
3
D
2
D
0
D
1
Don’t care
A6 A5 A4
High Impedance
Low ≥ 400
s
CS
SCLK
SDI
SDO
10
12
3
4567
8
9
11
12
13
14
15
16
17
18
19
20
21
22
23
A0
A6 A5 A4 A3 A2 A1
16-bit data
High Impedance
D
0
D
7
D
6
D
5
D
4
D
3
D
2
D
1
Register Address
D
14
D
15
24
D
13
D
12
D
11
D
10
D
9
D
8
1234
A6 A5 A4
Don't care
Drive low
Low ≥ 400
s
Low ≥ 400
s
Don't care
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