CN8478 Datasheet, PDF (193/221 Pages) Conexant Systems, Inc – Multichannel Synchronous Communications Controller (MUSYCC)

CN8478/CN8474A/CN8472A/CN8471A
7.0 Electrical and Mechanical Specifications
Multichannel Synchronous Communications Controller (MUSYCC™)
7.2 Timing and Switching Specifications
Table 7-8. PCI I/O Timing Parameters, 33 MHz PCI Clock
Symbol
Parameter
Min
Max
Unit
T_val
PCLK to Signal Valid Delay—Bused Signal^{(1, 2, 4)}
2
11
ns
T_val (ptp)
PCLK to Signal Valid Delay—Point To Point^{(1, 2)}
2
12
ns
T_on
Float to Active Delay⁽³⁾
—
13
ns
T_off
Active to Float Delay⁽³⁾
—
28
ns
T_ds
Input Setup Time to Clock—Bused Signal⁽²⁾
7
—
ns
T_su (ptp)
Input Setup Time to Clock—Point To Point⁽²⁾
10, 12
—
ns
T_dh
Input Hold Time from Clock⁽⁵⁾
0
—
ns
NOTE(S):
(1) _{Minimum and maximum times are evaluated at 80 pF equivalent load. Actual test capacitance may vary, and results should}
be correlated to these specifications.
(2) _{REQ* and GNT* are the only point-to-point signals and have different output valid delay and input setup times than bused}
signals. GNT* has a setup of 10; REQ* has a setup of 12.
(3) _{For purposes of active/float timing measurements, the high-Z or off state is when the total current delivered through the}
component pin is less than or equal to the leakage current specification at 80 pF equivalent load.
(4) _{TVAL = 17 ns max for INTA.}
(5) _{Tdh = 0.5 ns min for GNT, IDSEL, and IRDY.}
Table 7-9. PCI I/O Timing Parameters, 66 MHz PCI Clock
Symbol
Parameter
Min
Max
Units
T_val
PCLK to Signal Valid Delay—Bused Signal^{(1, 2)}
2
6
ns
T_val (ptp)
PCLK to Signal Valid Delay—Point To Point^{(1, 2)}
2
6
ns
T_on
Float to Active Delay⁽³⁾
2
—
ns
T_off
Active to Float Delay⁽³⁾
—
14
ns
T_ds
Input Setup Time to Clock—Bused Signal⁽²⁾
3
—
ns
T_su (ptp)
Input Setup Time to Clock—Point To Point⁽²⁾
5
—
ns
T_dh
Input Hold Time from Clock
0
—
ns
NOTE(S):
(1) _{Minimum and maximum times are evaluated at 80 pF equivalent load. Actual test capacitance may vary, and results should}
be correlated to these specifications.
(2) _{REQ* and GNT* are the only point-to-point signals and have different output valid delay and input setup times than bused}
signals. GNT* has a setup of 10; REQ* has a setup of 12.
(3) _{For purposes of active/float timing measurements, the high-Z or off state is when the total current delivered through the}
component pin is less than or equal to the leakage current specification at 80 pF equivalent load.
100660E
Conexant
7-7