I2C and JTAG Nonvolatile 9-Bit I/O Expander Plus Memory _________________" />
鍙冩暩(sh霉)璩囨枡
鍨嬭櫉(h脿o)锛� DS4550E+T&R
寤犲晢锛� Maxim Integrated Products
鏂囦欢闋�(y猫)鏁�(sh霉)锛� 5/18闋�(y猫)
鏂囦欢澶�?銆�?/td> 0K
鎻忚堪锛� IC I/O EXPANDER I2C 9B 20TSSOP
鐢�(ch菐n)鍝佸煿瑷�(x霉n)妯″锛� Lead (SnPb) Finish for COTS
Obsolescence Mitigation Program
妯�(bi膩o)婧�(zh菙n)鍖呰锛� 2,500
鎺ュ彛锛� I²C锛孞TAG
杓稿叆/杓稿嚭鏁�(sh霉)锛� 9
涓柗杓稿嚭锛� 鐒�(w煤)
闋荤巼 - 鏅�(sh铆)閻橈細 400kHz
闆绘簮闆诲锛� 2.7 V ~ 5.5 V
宸ヤ綔婧害锛� -40°C ~ 85°C
瀹夎椤炲瀷锛� 琛ㄩ潰璨艰
灏佽/澶栨锛� 20-TSSOP锛�0.173"锛�4.40mm 瀵級
渚涙噳(y墨ng)鍟嗚ō(sh猫)鍌欏皝瑁濓細 20-TSSOP
鍖呰锛� 甯跺嵎 (TR)
鍖呮嫭锛� EEPROM
DS4550
I2C and JTAG Nonvolatile 9-Bit I/O
Expander Plus Memory
____________________________________________________________________
13
Table 3. Boundary Scan Control Bits [33 Bits]
CELL
NUMBER
NAME
TYPE
32
A2 input
Input Observe Only
31
A1 input
Input Observe Only
30
A0 input
Input Observe Only
29
SCL input
Input Observe Only
28
SDA input
Input Observe Only
27
SDA output
Output
26
IO8 pubout
Output
25
IO8 pdbout
Output
24
IO8 input
Input Observe Only
23
IO7 pubout
Output
22
IO7 pdbout
Output
21
IO7 input
Input Observe Only
20
IO6 pubout
Output
19
IO6 pdbout
Output
18
IO6 input
Input Observe Only
17
IO5 pubout
Output
16
IO5 pdbout
Output
Table 4. EEPROM Read Cycle
STEP
TAP STATE
COMMENTS
Select-IR-Scan
Capture-IR
Shift-IR (4 x TCK)
The 4-bit instruction is shifted in through TDI.
Exit1-IR
Select
Address
Register
Update-IR
Select-DR-Scan
Capture-DR
No-op.
Shift-DR (8 x TCK)
The 8-bit address is shifted in through TDI.
Exit1-DR
Load
EEPROM
Address
Update-DR
The shifted 8-bit Address Register data is output latched.
Select-IR-Scan
Capture-IR
Shift-IR (4 x TCK)
The 4-bit instruction is shifted in through TDI.
Exit1-IR
Select
Read
Register
Update-IR
Select-DR-Scan
Capture-DR
The 8-bit EEPROM data is loaded into the EEPROM Read Register.
Shift-DR (8 x TCK)
The 8-bit data is shifted out through TDO.
Exit1-DR
Read
EEPROM
Data
Update-DR
No-op.
CELL
NUMBER
NAME
TYPE
15
IO5 input
Input Observe Only
14
IO4 pubout
Output
13
IO4 pdbout
Output
12
IO4 input
Input Observe Only
11
IO3 pubout
Output
10
IO3 pdbout
Output
9
IO3 input
Input Observe Only
8
IO2 pubout
Output
7
IO2 pdbout
Output
6
IO2 input
Input Observe Only
5
IO1 pubout
Output
4
IO1 pdbout
Output
3
IO1 input
Input Observe Only
2
IO0 pubout
Output
1
IO0 pdbout
Output
0
IO0 input
Input Observe Only
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