Datasheet

DS89C430/DS89C450 Ultra-High-Speed Flash Microcontrollers
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Table 7. Page Mode 1, Data Memory Cycle Stretch Values (PAGES1:PAGES0 = 00)
RD/WR PULSE WIDTH (IN NUMBER OF OSCILLATOR CLOCKS)
MD2:MD0
STRETCH
CYCLES
4X/
2X, CD1,
CD0 = 100
4X/2X, CD1,
CD0 = 000
4X/2X, CD1,
CD0 = X10
4X/
2X, CD1,
CD0 = X11
000 0 0.25 0.5 1 1024
001 1 0.75 1.5 3 3072
010 2 1.75 3.5 7 7168
011 3 2.75 5.5 11 11,264
100 7 3.75 7.5 15 15,360
101 8 4.75 9.5 19 19,456
110 9 5.75 11.5 23 23,552
111 10 6.75 13.5 27 27,648
Table 8. Page Mode 1, Data Memory Cycle Stretch Values (PAGES1:PAGES0 = 01)
RD/WR PULSE WIDTH (IN NUMBER OF OSCILLATOR CLOCKS)
MD2:MD0
STRETCH
CYCLES
4X/
2X, CD1,
CD0 = 100
4X/2X, CD1,
CD0 = 000
4X/2X, CD1,
CD0 = X10
4X/2X, CD1,
CD0 = X11
000 0 0.25 0.5 1 1024
001 1 0.75 1.5 3 3072
010 2 1.75 3.5 7 7168
011 3 2.75 5.5 11 11,264
100 7 3.75 7.5 15 15,360
101 8 4.75 9.5 19 19,456
110 9 5.75 11.5 23 23,552
111 10 6.75 13.5 27 27,648
Table 9. Page Mode 1, Data Memory Cycle Stretch Values (PAGES1:PAGES0 = 10)
RD/WR PULSE WIDTH (IN NUMBER OF OSCILLATOR CLOCKS)
MD2:MD0
STRETCH
CYCLES
4X/
2X, CD1,
CD0 = 100
4X/2X, CD1,
CD0 = 000
4X/2X, CD1,
CD0 = X10
4X/2X, CD1,
CD0 = X11
000 0 0.5 1 2 2048
001 1 1 2 4 4096
010 2 2 4 8 8192
011 3 3 6 12 12,288
100 7 4 8 16 16,384
101 8 5 10 20 20,480
110 9 6 12 24 24,576
111 10 7 14 28 28,672