Texas Instruments TCM4300 User Manual
Page 30
3–7
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
tsu(R/W)
Setup time, read/write MCRW stable before falling edge of
strobe MCDS
TRW(SU)
0
ns
th(R/W)
Hold time, read/write MCRW stable after rising edge of
strobe MCDS
TRW(HO)
10
ns
tsu(WA)
Setup time, write address MCA stable before falling edge
of strobe MCDS
TWA(SU)
0
ns
th(WA)
Hold time, write address MCA stable after rising edge of
strobe MCDS
TWA(HO)
10
ns
tsu(W)
Setup time, write data stable MCD before rising edge of
strobe MCDS
TWD(SU)
14
ns
th(W)
Hold time, write data stable MCD after rising edge of strobe
MCDS
TWD(HO)
0
ns
tw(WSTB) Pulse duration, write strobe pulse width low on MCDS
TWR(STB)
60
ns
th(CS)
Hold time, chip select MCCSH and MCCSL stable before
falling edge of strobe MCDS
TCS(HO)
0
ns
tsu(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)
tsu(R / W)
tsu(WA)
10%
10%
90%
tw(WSTB)
th(WA)
tsu(W)
th(W)
tsu(CS)
th(CS)
90%
90%
10%
10%
MCCSH
MCCSL
NOTE A: Chip selection is defined as both MCCS and MCDS active.
th(R / W)
Figure 3–7. Microcontroller Interface Timing Requirements
(Motorola 16-Bit Write Cycle, MTS [1:0] = 10)