AT89C52-12AC ATMEL Corporation, AT89C52-12AC Datasheet - Page 14

• Manufacturer Part Number: AT89C52-12AC
• Description: 8-Bit Microcontroller with 8K Bytes Flash
• Manufacturer: ATMEL Corporation

4-74
Figure 9. Programming the Flash Memory
Flash Programming and Verification Characteristics
T
Note:
3-24 MHz
PROGRAMMING
A
Symbol
V
I
1/t
t
t
t
t
t
t
t
t
t
t
t
t
t
MODES TABLE
PP
AVGL
GHAX
DVGL
GHDX
EHSH
SHGL
GHSL
GLGH
AVQV
ELQV
EHQZ
GHBL
WC
PP
SEE FLASH
= 0°C to 70°C, V
CLCL
OOOOH/1FFFH
(1)
(1)
(1)
ADDR.
1. Only used in 12-volt programming mode.
A0 - A7
A8 - A12
CC
Parameter
Programming Enable Voltage
Programming Enable Current
Oscillator Frequency
Address Setup to PROG Low
Address Hold After PROG
Data Setup to PROG Low
Data Hold After PROG
P2.7 (ENABLE) High to V
V
V
PROG Width
Address to Data Valid
ENABLE Low to Data Valid
Data Float After ENABLE
PROG High to BUSY Low
Byte Write Cycle Time
= 5.0
PP
PP
AT89C52
Setup to PROG Low
Hold After PROG
P1
P2.0 - P2.4
P2.6
P2.7
P3.6
P3.7
XTAL2
XTAL1
GND
AT89C52
10%
PSEN
RST
ALE
V
EA
P0
CC
PP
+5V
PGM
DATA
PROG
V /V
V
IH
IH
PP
Figure 10. Verifying the Flash Memory
3-24 MHz
PROGRAMMING
MODES TABLE
OOOOH/1FFFH
SEE FLASH
ADDR.
A0 - A7
A8 - A12
48t
48t
48t
48t
48t
11.5
Min
10
10
CLCL
CLCL
CLCL
CLCL
CLCL
3
1
0
P1
P2.0 - P2.4
P2.6
P2.7
P3.6
P3.7
XTAL 2
XTAL1
GND
AT89C52
48t
48t
48t
Max
12.5
110
1.0
1.0
2.0
24
PSEN
CLCL
CLCL
CLCL
RST
ALE
V
EA
P0
CC
+5V
PGM DATA
(USE 10K
PULLUPS)
Units
MHz
mA
ms
V
V
V
IH
s
s
s
s
IH