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3.9 TCM4300 to Microcontroller Interface Timing Requirements (Motorola 8-Bit
Write Cycle) (see Figure 3–9 and Note 5)
PARAMETER
ALTERNATE
SYMBOL
MIN MAX
UNIT
t
su(R/W)
Setup time, read/write MCRW stable before rising edge of
strobe MCDS
TRW
(SU)
0 ns
t
h(R/W)
Hold time, read/write MCRW stable after falling edge of
strobe MCDS
TRW
(HO)
10 ns
t
su(WA)
Setup time, write address MCA stable before rising edge of
strobe MCDS
TWA
(SU)
0 ns
t
h(WA)
Hold time, write address MCA stable after falling edge of
strobe MCDS
TWA
(HO)
10 ns
t
su(W)
Setup time, write data stable MCD before falling edge of
strobe MCDS
TWD
(SU)
14 ns
t
h(W)
Hold time, write data stable MCD after falling edge of
strobe MCDS
TWD
(HO)
0 ns
t
w(WSTB)
Pulse duration, write strobe pulse width high on MCDS TWR
(STB)
60 ns
t
h(CS)
Hold time, chip select MCCSH and MCCSL stable before
rising edge of strobe MCDS
TCS
(HO)
0 ns
t
su(CS)
Setup time, chip select MCCSH and MCCSL stable before
falling edge of strobe MCDS
TCS
(SU)
0 ns
NOTE 5: Timings are based upon Motorola 68HC11D3 (3 MHz) and Motorola 68HC11G5 (2.1 MHz).
90%
10%
MCRW
10%
MCDS
(see Note A)
t
su(R/W)
t
h(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.
MCA0–MCA4
MCD0–MCD7
Figure 3–9. Microcontroller Interface Timing Requirements
(Motorola 8-Bit Write Cycle, MTS [1:0] = 01)