Datasheet

____________________________________________________ DS34S101, DS34S102, DS34S104, DS34S108
Rev: 032609 164 of 198
14. AC Timing Characteristics
Table 14-1. Input Pin Transition Time Requirements
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
Rise Time tr 10 to 90% of DVDDIO 6 ns
Fall Time tf 90 to 10% of DVDDIO 6 ns
14.1 CPU Interface Timing
Table 14-2. CPU Interface AC characteristics
PARAMETER
SYMBOL
MIN
TYP
MAX
UNITS
RST_SYS_N Active Low Pulse Width
T5
50
µs
H_CS_N Deasserted or H_R_W_N Low to H_D[31:0]
High-Z
T22
16.2
ns
H_READY_N Active Pull-Up Pulse Width
T26
2.9
6.8
ns
Latest of H_WR_BEx_N Asserted or H_CS_N Asserted
to H_D[31:0] Valid
T31
0
ns
H_CS_N Deasserted to H_D[31:0] Not Valid
T32
0
ns
H_CS_N Asserted to H_AD[24:1] Valid
T33
0
ns
H_CS_N Deasserted to H_AD[24:1] Not Valid
T34
0
ns
H_CS_N Asserted to H_R_W_N Valid
T35
0
ns
H_CS_N Deasserted to H_R_W_N Not Valid
T36
0
ns
H_CS_N Deasserted to H_READY_N High
T37
12
ns
H_CS_N Deasserted to H_WR_BEx_N[3:0] Not Valid
T40
0
ns
Delay Between Two Successive Accesses
T43
1.5
Internal
CLK_SYS
cycles
H_D[31:0] Valid before H_READY_N Active Low
T44
1.5
ns
NOTE: The output timing specified assumes 50 pF load.
Figure 14-1. RST_SYS_N Timing
RST_SYS_N
T5