Texas Instruments TCM4300 manual 10% ThR / W ThWA

3.9TCM4300 to Microcontroller Interface Timing Requirements (Motorola 8-Bit Write Cycle) (see Figure 3±9 and Note 5)

	PARAMETER	ALTERNATE	MIN MAX	UNIT
		SYMBOL
tsu(R/W)	Setup time, read/write MCRW stable before rising edge of	TRW(SU)	0	ns
	strobe MCDS
th(R/W)	Hold time, read/write MCRW stable after falling edge of	TRW(HO)	10	ns
	strobe MCDS
tsu(WA)	Setup time, write address MCA stable before rising edge of	TWA(SU)	0	ns
	strobe MCDS
th(WA)	Hold time, write address MCA stable after falling edge of	TWA(HO)	10	ns
	strobe MCDS
tsu(W)	Setup time, write data stable MCD before falling edge of	TWD(SU)	14	ns
	strobe MCDS
th(W)	Hold time, write data stable MCD after falling edge of	TWD(HO)	0	ns
	strobe MCDS
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	TCS(HO)	0	ns
	rising edge of strobe MCDS
tsu(CS)	Setup time, chip select MCCSH and MCCSL stable before	TCS(SU)	0	ns
	falling edge of strobe MCDS

NOTE 5: Timings are based upon Motorola 68HC11D3 (3 MHz) and Motorola 68HC11G5 (2.1 MHz).

		tw(WSTB)
MCDS	90%	90%
(see Note A)	10%
	tsu(R / W)
MCRW	10%
	tsu(WA)

10%

th(R / W)

10%

th(WA)

MCA0±MCA4

tsu(W) th(W)

MCD0±MCD7

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

90%

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

Figure 3±9. Microcontroller Interface Timing Requirements

(Motorola 8-Bit Write Cycle, MTS [1:0] = 01)

3±9