Figure 3. Programming the Flash Memory
Figure 4. Verifying the Flash Memory
AT89C4051
AT89C4051
PP
Flash Programming and Verification Characteristics
TA = 0°C to 70°C, VCC = 5.0 ± 10%
Symbol
VPP
Parameter
Min
Max
12.5
250
Units
V
Programming Enable Voltage
Programming Enable Current
Data Setup to PROG Low
Data Hold After PROG
P3.4 (ENABLE) High to VPP
VPP Setup to PROG Low
VPP Hold After PROG
11.5
IPP
µA
µs
µs
µs
µs
µs
µs
µs
µs
ns
tDVGL
tGHDX
tEHSH
tSHGL
tGHSL
tGLGH
tELQV
tEHQZ
tGHBL
tWC
1.0
1.0
1.0
10
10
1
PROG Width
110
1.0
1.0
50
ENABLE Low to Data Valid
Data Float After ENABLE
PROG High to BUSY Low
Byte Write Cycle Time
RDY/BSY\ to Increment Clock Delay
Increment Clock High
0
2.0
ms
µs
ns
tBHIH
1.0
tIHIL
200
Note:
1. Only used in 12-volt programming mode.
AT89C4051
8
ATMEL [ ATMEL ]
