GX3246 Datasheet, PDF (36/47 Pages) Semtech Corporation – Crosspoint Switch with Trace Equalization and Output De-emphasis

Table 4-13: APPI External Timing Specifications for Normal Write (Continued)
Parameter
P_CS HIGH before next read/write cycle
Frequency for back-to-back single writes
Symbol
t_{CSH_w}
—
Equiv.
Cycles
5
—
Min
37.0
—
Typ Max Units
—
—
ns
—
16.17 MHz
4.12.1.2 APPI External Timing for Auto-Increment Write
P_CS
P_R/W
P_ADD
[11:0]
t _{SRW_w}
P_DAT
[15:0]
t _{SCS_w}
An [11:0]
t _{SA_w}
Dn [15:0]
t _{SD_w}
t _{HA_w}
t _{HD_w}
t _{HCS_w}
t _{CSH_w}
t _{H R W_w}
Dn+1[15:0]
t _{SD_w}
t _{HD_w}
P_ADS
t _{PW_w}
t _{ADSH_w}
t _{PW_w}
Figure 4-7: External Timing for Auto-Increment Write Cycle
Table 4-14: APPI External Timing Specifications for Auto-Increment Write
Parameter
P_CS LOW before P_ADS positive edge
P_CS hold time after last P_ADS positive edge
P_R/W LOW before P_CS negative edge
P_R/W hold time after P_ADS positive edge
P_ADD[11:0] setup before P_ADS positive edge
P_ADD[11:0] hold after P_ADS positive edge
P_DAT[15:0] setup before P_ADS positive edge
P_DAT[15:0] hold after P_ADS positive edge
P_ADS LOW pulse width
P_ADS HIGH before next pulse
P_CS HIGH before next read/write cycle
Frequency during auto-increment write
Symbol
Equiv.
Cycles
t_{SCS_w}
—
t_{HCS_w}
2
t_{SRW_w}
—
t_{HRW_w}
2
t_{SA_w}
—
t_{HA_w}
—
t_{SD_w}
—
t_{HD_w}
—
t_{PW_w}
0.6
t_{ADSH_w}
0.6
t_{CSH_w}
5
—
—
Min
10.0
14.8
1.5
14.8
10.0
5.0
4.0
4.0
4.4
4.4
37.0
—
Typ Max Units
—
—
ns
—
—
ns
—
—
ns
—
—
ns
—
—
ns
—
—
ns
—
—
ns
—
—
ns
—
—
ns
—
—
ns
—
—
ns
—
112.5 MHz
GX3246 290 x 146 3.5Gb/s Crosspoint
Final Data Sheet Rev. 2
GENDOC-056078 March 2013
www.semtech.com
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