Hold Timing - Texas Instruments TMS320 User Manual

switching characteristics over recommended operating conditions (see Note 3 and 8)
t CLKOUT1 low to reset state entered
d(RS)
t CLKOUT1 to IACK valid
d(IACK)
t XF valid before falling edge of STRB
d(XF)
NOTES: 3. Q = 1/4t .
c(C)
8. RS, INT, and BIO are asynchronous inputs and can occur at any time during a clock cycle. However, if the specified setup time is met,
the exact sequence shown in the timing diagrams will occur.
timing requirements over recommended operating conditions (see Note 3 and 8)
t INT/BIO/RS setup before CLKOUT1 high
su(IN)
t INT/BIO/RS hold after CLKOUT1 high
h(IN)
t INT/BIO fall time
f(IN)
t INT/BIO low pulse duration
w(IN)
t RS low pulse duration
w(RS)
†
Value derived from characterization data and not tested.
NOTES: 3. Q = 1/4t .
c(C)
8. RS, INT, and BIO are asynchronous inputs and can occur at any time during a clock cycle. However, if the specified setup time is met,
the exact sequence shown in the timing diagrams will occur.
switching characteristics over recommended operating conditions (see Note 3)
t HOLDA low after CLKOUT1 low
d(C1L-AL)
t HOLDA low to address three-state
dis(AL-A)
t Address three-state after CLKOUT1 low (HOLD mode, see Note 9)
dis(C1L-A)
t HOLD high to HOLDA high
d(HH-AH)
t Address driven before CLKOUT1 low (HOLD mode, see Note 9)
en(A-C1L)
†
Value derived from characterization data and not tested.
NOTES: 3. Q = 1/4t .
c(C)
9. A15-A0, PS, DS, IS, STRB, and R/W timings are all included in timings referenced as "address."
timing requirements over recommended operating conditions (see Note 3)
t HOLD valid after CLKOUT2 high
d(C2H-H)
NOTE 3: Q = 1/4t .
c(C)
RS, INT, BIO, AND XF TIMING
PARAMETER

HOLD TIMING

PARAMETER

POST OFFICE BOX 1443 HOUSTON, TEXAS 77001
TMS320 SECOND GENERATION
DIGITAL SIGNAL PROCESSORS
SPRS010B — MAY 1987 — REVISED NOVEMBER 1990
MIN TYP
-- 25 0
Q -- 30
MIN NOM
50
0
t
c(C)
3t
c(C)
MIN TYP
†
--25
†
15
MIN NOM
MAX UNIT
45 ns
25 ns
ns
MAX UNIT
ns
ns
†
15 ns
ns
ns
MAX UNIT
25 ns
ns
†
30 ns
50 ns
†
10 ns
MAX UNIT
Q -- 45 ns
25