DS89C420_02 Datasheet, PDF (47/58 Pages) Maxim Integrated Products – Ultra-High-Speed Microcontroller

PARAMETER
Input Instruction Hold
After PSEN
Input Instruction Float
After PSEN
Port 0 Address to Valid
Instruction In
Port 2 Address to Valid
Instruction In
PSEN Low to Port 0
Address Float
RD Pulse Width (P3.7)
WR Pulse Width (P3.6)
RD (P3.7) Low to Valid
Data In
SYMBOL
t PXIX
1 CYCLE
PAGE MODE 1
MIN
MAX
0
2 CYCLE
PAGE MODE 1
MIN
MAX
0
4 CYCLE
PAGE MODE 1
MIN
MAX
0
PAGE MODE 2
MIN
MAX
0
NON-PAGE MODE
MIN
MAX
0
DS89C420
UNITS NOTES
ns
t PXIZ
tCLCL - 5
tCLCL - 5
ns
t AVIV0
1.5tCLCL - 20
3tCLCL - 20
ns
t AVIV2
tCLCL - 18
1.5tCLCL - 18
2.5tCLCL - 18
3tCLCL - 20
3.5tCLCL - 20
ns
t PLAZ
0
0
ns
tRLRH
tCLCL - 5 +
t STC1
tCLCL - 5 +
t STC1
2tCLCL - 5 +
t STC1
2tCLCL - 5 +
t STC1
2tCLCL - 5 +
t STC1
ns
2
tWLWH
tCLCL - 5 +
t STC1
tCLCL - 5 +
t STC1
2tCLCL - 5 +
t STC1
2tCLCL - 5 +
t STC1
2tCLCL - 5 +
t STC1
ns
2
tRLDV
tCLCL - 15 +
t STC1
tCLCL - 15 +
t STC1
2tCLCL - 15 +
t STC1
2tCLCL - 15 +
t STC1
2tCLCL - 15 +
ns
2
t STC1
Data Hold After RD (P3.7)
tRHDX
0
0
0
0
0
ns
Data Float After RD (P3.7)
tRHDZ
MOVX ALE Low to Input
Data Valid
Port 0 Address to Valid
Data In
Port 2 Address to Valid
Data In
t LLDV
t AVDV0
t AVDV2
tCLCL - 16 +
t STC1
1.5tCLCL - 16
+ tSTC1
3.5tCLCL - 16
+ tSTC1
tCLCL - 5
2.5tCLCL - 20
+ tSTC1
3tCLCL - 20 +
t STC1
3.0tCLCL - 16
+ tSTC1
tCLCL - 5
ns
2.5tCLCL - 20
ns
2
+ tSTC1
3tCLCL - 20 +
ns
2
t STC1
3.5tCLCL - 20
ns
2
+ tSTC1
47 of 58