ACS8509 Semtech Corporation, ACS8509 Datasheet - Page 7

• Manufacturer Part Number: ACS8509
• Description: Synchronous Equipment Timing Source for Sonet or SDH Network Elements
• Manufacturer: Semtech Corporation

Table 3 Other Pins (cont...)
Revision 2.00/January 2006 © Semtech Corp.
ADVANCED COMMUNICATIONS
75
76 - 83
88
90
95
99
100
Pin Number
RDY
AD(7:0)
O2
O3
O4
MSTSLVB
SONSDHB
Symbol
I/O
IO
O
O
O
O
I
I
TTL/CMOS
TTL/CMOS
TTL/CMOS
TTL/CMOS
Type
TTL
TTL
TTL
D
U
D
FINAL
Ready/Data Acknowledge: This pin is asserted High to indicate the device
has completed a read or write operation.
Address/Data: Multiplexed data/address bus depending on the
microprocessor mode selection. AD(0) is SDO in Serial mode.
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
Output Reference 3: 19.44 MHz - fixed.
Output Reference 4: 1.544/2.048 MHz, (T4 BITS).
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.
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.
Page 7
Description
ACS8509 SETS
DATASHEET
www.semtech.com