Filter
Top Products
3–8
3.8 TCM4300 to Microcontroller Interface Timing Requirements (Motorola 8-Bit
Read Cycle) (see Figure 3–8 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(RA)
Setup time, read address MCA stable before rising edge of
strobe MCDS
TRA
(SU)
0 ns
t
h(RA)
Hold time, read address MCA stable after falling edge of
strobe MCDS
TRA
(HO)
10 ns
t
en(RD)
Enable time, read data on rising edge of strobe MCDS to
TCM4300 driving data bus MCD
TRD
(EN)
10 ns
t
v(RD)
Valid time, read data on rising edge of strobe MCDS to valid
data MCD
TRD
(DV)
50 ns
t
inv
Data MCD invalid after falling edge of strobe MCDS TRD
(INV)
10 ns
t
dis(RD)
Disable time, read data. TCM4300 releases MDS data bus
after falling edge of strobe MCDS
TRD
(DIS)
28 ns
t
h(CS)
Hold time, chip select MCCSH and MCCSL stable before
falling edge of strobe MCDS
TCS
(HO)
0 ns
t
su(CS)
Setup time, chip select MCCSH and MCCSL stable before
rising edge of strobe MCDS
TCS
(SU)
0 ns
NOTE 5: Timings are based upon Motorola 68HC11D3 (3 MHz) and Motorola 68HC11G5 (2.1 MHz).
MCDS
(see Note A)
MCRW
t
su(RA)
10%
90%
90%
10%
90%90%
t
h(RA)
t
v(RD)
t
en(RD)
t
dis(RD)
t
inv
t
h(CS)
t
su(CS)
MCCSH
MCCSL
90% 90%
10% 10%
NOTE A: Chip selection is defined as both MCCS and MCDS active.
t
su(R/W)
t
h(R/W)
MCA0–MCA4
MCD0–MCD7
Figure 3–8. Microcontroller Interface Timing Requirements
(Motorola 8-Bit Read Cycle, MTS [1:0] = 01)