Philips S1D13505 - page 53

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Hardware Functional Specification S1D13505
Issue Date: 01/02/02 X23A-A-001-14
1. If the S1D13505 host interface is disabled, the timing for DTACK# driven high is relative to
the falling edge of CS#, AS# or the first positive edge of CLK after A[20:1], M/R# becomes
valid,
whichever one is later.
2. If the S1D13505 host interface is disabled, the timing for D[15:0] driven is relative to the fall-
ing edge of UDS#, LDS# or the first positive edge of CLK after A[20:1], M/R# becomes valid,
whichever one is later.
Table 7-3: MC68000 Timing
3.0V 5.0V
Symbol Parameter Min Max Min Max Units
t1 Clock period 20 20 ns
t2 Clock pulse width high 66ns
t3 Clock pulse width low 66ns
t4 A[20:1], M/R# setup to first CLK where CS# = 0 AS# = 0, and
either UDS#=0 or LDS# = 0 10 10 ns
t5 A[20:1], M/R# hold from AS# 00ns
t6 CS# hold from AS# 00ns
t7 R/W# setup to before to either UDS#=0 or LDS# = 0 10 10 ns
t8 R/W# hold from AS# 00ns
t91AS# = 0 and CS# = 0 to DTACK# driven high 00ns
t10 AS# high to DTACK# high 318312ns
t11 First BCLK where AS# = 1 to DTACK# high impedance 25 10 ns
t12 D[15:0] valid to third CLK where CS# = 0 AS# = 0, and either
UDS#=0 or LDS# = 0 (write cycle) 10 10 ns
t13 D[15:0] hold from falling edge of DTACK# (write cycle) 00ns
t142Falling edge of UDS#=0 or LDS#=0 to D[15:0] driven (read
cycle) 00ns
t15 D[15:0] valid to DTACK# falling edge (read cycle) 00ns
t16 UDS# and LDS# high to D[15:0] invalid/high impedance (read
cycle) 5 25 2.5 10 ns
t17 AS# high setup to CLK 22ns