Texas Instruments TCM4300 - Manual (Page 32)

3–9
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
tsu(R/W)
Setup time, read/write MCRW stable before rising edge of
strobe MCDS
TRW(SU) 0 ns
th(R/W)
Hold time, read/write MCRW stable after falling edge of
strobe MCDS
TRW(HO) 10 ns
tsu(WA)
Setup time, write address MCA stable before rising edge of
strobe MCDS
TWA(SU) 0 ns
th(WA)
Hold time, write address MCA stable after falling edge of
strobe MCDS
TWA(HO) 10 ns
tsu(W)
Setup time, write data stable MCD before falling edge of
strobe MCDS
TWD(SU) 14 ns
th(W)
Hold time, write data stable MCD after falling edge of
strobe MCDS
TWD(HO) 0 ns
tw(WSTB) Pulse duration, write strobe pulse width high on MCDS TWR(STB) 60 ns
th(CS)
Hold time, chip select MCCSH and MCCSL stable before
rising edge of strobe MCDS
TCS(HO) 0 ns
tsu(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)
tsu(R / W) th(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.
MCA0–MCA4
MCD0–MCD7
Figure 3–9. Microcontroller Interface Timing Requirements
(Motorola 8-Bit Write Cycle, MTS [1:0] = 01)