Datasheet

DS26518 8-Port T1/E1/J1 Transceiver
295 of 312
Table 13-2. AC Characteristics—Microprocessor Bus Timing
(V
DD
= 3.3V ±5%, T
A
= -40°C to +85°C.) (See Figure 13-2, Figure 13-3, Figure 13-4, and Figure 13-5.)
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
Setup Time for A[12:0] Valid to CSB
Active
t1 0 ns
Setup Time for CSB Active to Either RDB,
or
WRB Active
t2 0 ns
Delay Time from Either RDB or DSB
Active to D[7:0] Valid
t3 (Note 1) 175 ns
Hold Time from Either RDB or WRB
Inactive to
CSB Inactive
t4 0 ns
Hold Time from CSB or RDB or DSB
Inactive to D[7:0] Tri-State
t5 5 20 ns
Wait Time from WRB Active to Latch Data
t6 40 ns
Data Setup Time to WRB Inactive
t7 10 ns
Data Hold Time from WRB Inactive
t8 2 ns
Address Hold from WRB Inactive
t9 0 ns
Write Access to Subsequent Write/Read
Access Delay Time
t10 (Note 1) 30 ns
Note 1: If supplying a 1.544MHz MCLK, the FREQSEL bit must be set to meet this timing.