IBM3009K2672
IBM SONET/SDH Framer
Note: The microprocessor interface of the SONET/SDH framer can be directly connected to a Motorola
MC68360 microprocessor running synchronously at 25 MHz or 33.34 MHz. The connections are as follows:
CLKO1
A(13:0)
→
→
GPPCLK
GPADDR(13:0)
D(31:24) ←→ GPDATA(7:0)
CSn
DS
→
→
→
←
→
GPSEL
GPDS
R/W
GPR/W
GPDTACK
GPINT
DSACK0
IRQx
The following conditions must be established for proper operation:
• Signal delay skew from MC68360 to SONET/SDH framer between +0 ns and +5 ns versus CLKO1 delay.
• Minimum total round-trip delay (CLKO1-> GPPCLK, GPDTACK-> DSACK0) of 3 ns (t
= 30 ns) or 5 ns
CYC
(t
= 40 ns); this avoids a possible fast path.
CYC
• The SONET/SDH framer must be deselected (GPSEL high) between two accesses.
ssframer.01
8/27/99
Timing Characteristics
Page 85 of 279
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