Texas Instruments TCM4300 manual Twdho Mcds, MCA0±MCA4

3.7TCM4300 to Microcontroller Interface Timing Requirements (Motorola 16-Bit Write Cycle) (see Figure 3±7 and Note 4)

	PARAMETER	ALTERNATE	MIN MAX	UNIT
		SYMBOL
tsu(R/W)	Setup time, read/write MCRW stable before falling edge of	TRW(SU)	0	ns
	strobe MCDS
th(R/W)	Hold time, read/write MCRW stable after rising edge of	TRW(HO)	10	ns
	strobe MCDS
tsu(WA)	Setup time, write address MCA stable before falling edge	TWA(SU)	0	ns
	of strobe MCDS
th(WA)	Hold time, write address MCA stable after rising edge of	TWA(HO)	10	ns
	strobe MCDS
tsu(W)	Setup time, write data stable MCD before rising edge of	TWD(SU)	14	ns
	strobe MCDS
th(W)	Hold time, write data stable MCD after rising edge of strobe	TWD(HO)	0	ns
	MCDS
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	TCS(HO)	0	ns
	falling edge of strobe MCDS
tsu(CS)	Setup time, chip select MCCSH and MCCSL stable before	TCS(SU)	0	ns
	rising edge of strobe MCDS
NOTE 4: Timings are based upon Motorola 68HC000 (16.67 MHz) and Motorola 68302 (16 MHz).

90%

MCDS (see Note A)

tsu(R / W)

MCRW

10%

MCA0±MCA4

tw(WSTB)

10% 10%

tsu(WA)

90%

th(R / W)

10%

th(WA)

tsu(W)

MCD0±MCD7

MCCSH	90%
	tsu(CS)	th(CS)
MCCSL	10%	10%

th(W)

90%

NOTE A: Chip selection is defined as both MCCS and MCDS active.

Figure 3±7. Microcontroller Interface Timing Requirements

(Motorola 16-Bit Write Cycle, MTS [1:0] = 10)

3±7