参数资料
型号: ACS8509
元件分类: 数字传输电路
英文描述: ATM/SONET/SDH SUPPORT CIRCUIT, PQFP100
封装: LQFP-100
文件页数: 66/68页
文件大小: 703K
代理商: ACS8509
ADVANCED COMMUNICATIONS
FINAL
DATASHEET
Revision 2.00/January 2006 Semtech Corp.
Page 7
www.semtech.com
ACS8509 SETS
75
RDY
O
TTL/CMOS
Ready/Data Acknowledge: This pin is asserted High to indicate the device
has completed a read or write operation.
76 - 83
AD(7:0)
IO
TTLD
Address/Data: Multiplexed data/address bus depending on the
microprocessor mode selection. AD(0) is SDO in Serial mode.
88
O2
O
TTL/CMOS
Output Reference 2: Default 6.48 MHz. Also Dig1 (1.544 MHz/2.048 MHz
and 2, 4, 8 x), 19.44 MHz, 25.92 MHz
90
O3
O
TTL/CMOS
Output Reference 3: 19.44 MHz - fixed.
95
O4
O
TTL/CMOS
Output Reference 4: 1.544/2.048 MHz, (T4 BITS).
99
MSTSLVB
I
TTLU
Master/Slave Select: Sets the initial power-up state (or state after a PORB)
of the Master/Slave selection register, Reg. 34, Bit 1. The register state
can be changed after power up by software.
100
SONSDHB
I
TTLD
SONET or SDH Frequency Select: Sets the initial power-up state (or state
after a PORB) of the SONET/SDH frequency selection registers, Reg. 34, Bit
2 and Reg. 38, Bit 5 and Bit 6. When set Low, SDH rates are selected
(2.048 MHz etc.) and when set High, SONET rates are selected (1.544 MHz
etc.) The register states can be changed after power-up by software.
Table 3 Other Pins (cont...)
Pin Number
Symbol
I/O
Type
Description
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相关代理商/技术参数
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