Rainbow Electronics DS26519 - Manual (Page 300)

DS26519 16-Port T1/E1/J1 Transceiver
300 of 310
13.2 JTAG Interface Timing
Table 13-5. JTAG Interface Timing
(V
DD
= 3.3V
±5%, T
A
= 0°C to +70°C for DS26519G; T
A
= -40°C to +85°C for DS26519GN.)
(See Figure 13-13 .)
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
JTCLK Clock Period t1 1000 ns
JTCLK Clock High:Low Time t2:t3 (Note 1) 50 500 ns
JTCLK to JTDI, JTMS Setup Time t4 5 ns
JTCLK to JTDI, JTMS Hold Time t5 2 ns
JTCLK to JTDO Delay t6 2 50 ns
JTCLK to JTDO High-Impedance Delay t7 2 50 ns
JTRST Width Low Time
t8 100 ns
Clock can be stopped high or low. Note 1:
Figure 13-13. JTAG Interface Timing Diagram
JTCLK
t1
JTD0
t4 t5
t2 t3
t7
JTDI, JTMS, JTRST
t6
JTRST
t8