Rev. 1.01 CSB SCLK SDI R/W A0 A1 A2 A3 0 A6 D0 D1 D2 D3 D4 D5 D6 D7 D0 D1 D2 D3 D4 0 SDO High Z 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 1" />
參數(shù)資料
型號: XRT8001IP-F
廠商: Exar Corporation
文件頁數(shù): 48/48頁
文件大?。?/td> 0K
描述: IC WAN CLOCK E1/E1 DUAL 18PDIP
產(chǎn)品變化通告: XRT obsolescence 05/Mar/2012
標(biāo)準(zhǔn)包裝: 41
類型: 時(shí)鐘/頻率發(fā)生器
PLL:
主要目的: 以太網(wǎng)(WAN),T1/E1
輸入: 時(shí)鐘
輸出: 時(shí)鐘
電路數(shù): 1
比率 - 輸入:輸出: 1:2
差分 - 輸入:輸出: 無/無
頻率 - 最大: 16.384kHz
電源電壓: 3.3 V ~ 5 V
工作溫度: -40°C ~ 85°C
安裝類型: 通孔
封裝/外殼: 18-DIP(0.300",7.62mm)
供應(yīng)商設(shè)備封裝: 18-PDIP
包裝: 管件
XRT8001
9
Rev. 1.01
CSB
SCLK
SDI
R/W A0
A1
A2
A3
0
A6
D0
D1
D2
D3
D4
D5
D6
D7
D0
D1
D2
D3
D4
0
SDO
High Z
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
Notes:
A4 and A5 are always “0”.
R/W = “1” for “Read” Operations
R/W = “0” for “Write” Operations
- Denotes a “don’t care” value
Simplified Interface Option
The user can simplify the design of the circuitry
connecting to the Microprocessor Serial Interface by
tying both the SDO and SDI pins together, and reading
data from and/or writing data to this “combined” signal.
This simplification is possible because only one of
these signals are active at any given time. The inactive
signal will be tri-stated.
Figure 6. Microprocessor Serial Interface Data Structure
Write Operation
Once the last address bit (A3) has been clocked into
the SDI input, the “Write” operation will proceed through
an idle period, lasting three SCLK periods. Prior to the
rising edge of SCLK Cycle # 9 (see Figure 6) the user
must begin to apply the 8-bit data word, that he/she
wishes to write to the Microprocessor Serial Interface,
onto the SDI input pin. The Microprocessor Serial
Interface will latch the value on the SDI input pin, on the
rising edge of SCLK. The user must apply this word (D0
through D7) serially, in ascending order with the LSB
first.
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