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3.7 TCM4300 to Microcontroller Interface Timing Requirements (Motorola
16-Bit Write Cycle) (see Figure 3–7 and Note 4)
PARAMETER
ALTERNATE
SYMBOL
MIN MAX
UNIT
t
su(R/W)
Setup time, read/write MCRW stable before falling edge of
strobe MCDS
TRW
(SU)
0 ns
t
h(R/W)
Hold time, read/write MCRW stable after rising edge of
strobe MCDS
TRW
(HO)
10 ns
t
su(WA)
Setup time, write address MCA stable before falling edge
of strobe MCDS
TWA
(SU)
0 ns
t
h(WA)
Hold time, write address MCA stable after rising edge of
strobe MCDS
TWA
(HO)
10 ns
t
su(W)
Setup time, write data stable MCD before rising edge of
strobe MCDS
TWD
(SU)
14 ns
t
h(W)
Hold time, write data stable MCD after rising edge of strobe
MCDS
TWD
(HO)
0 ns
t
w(WSTB)
Pulse duration, write strobe pulse width low on MCDS TWR
(STB)
60 ns
t
h(CS)
Hold time, chip select MCCSH and MCCSL stable before
falling edge of strobe MCDS
TCS
(HO)
0 ns
t
su(CS)
Setup time, chip select MCCSH and MCCSL stable before
rising edge of strobe MCDS
TCS
(SU)
0 ns
NOTE 4: Timings are based upon Motorola 68HC000 (16.67 MHz) and Motorola 68302 (16 MHz).
90%
10%
MCA0–MCA4
MCRW
MCD0–MCD7
10%
MCDS
(see Note A)
t
su(R/W)
t
su(WA)
10%
10%
90%
t
w(WSTB)
t
h(WA)
t
su(W)
t
h(W)
t
su(CS)
t
h(CS)
90%90%
10%10%
MCCSH
MCCSL
NOTE A: Chip selection is defined as both MCCS and MCDS active.
t
h(R/W)
Figure 3–7. Microcontroller Interface Timing Requirements
(Motorola 16-Bit Write Cycle, MTS [1:0] = 10)