mikrocont / 8953

Data I/O

Address

Mode

RST

PSEN

ALE/PROG

EA/VPP

P2.6

P2.7

P3.6

P3.7

P0.7:0

P2.5:0 P1.7:0

Serial Prog. Modes

H

h (1)

h (1)

x

Chip Erase

H

L

(2)

12V

H

L

L

L

X

X

Write (12K bytes) Memory

H

L

12V

L

H

H

H

DIN

ADDR

Read (12K bytes) Memory

H

L

H

12V

L

L

H

H

DOUT

ADDR

Write Lock Bits:

H

L

12V

H

L

H

L

DIN

X

Bit - 1

P0.7 = 0

X

Bit - 2

P0.6 = 0

X

Bit - 3

P0.5 = 0

X

Read Lock Bits:

H

L

H

12V

H

H

L

L

DOUT

X

Bit - 1

@P0.2

X

Bit - 2

@P0.1

X

Bit - 3

@P0.0

X

Read Atmel Code

H

L

H

12V

L

L

L

L

DOUT

30H

Read Device Code

H

L

H

12V

L

L

L

L

DOUT

31H

Serial Prog. Enable

H

L

(2)

12V

L

H

L

H

P0.0 = 0

X

Serial Prog. Disable

H

L

(2)

12V

L

H

L

H

P0.0 = 1

X

Read Serial Prog. Fuse

H

L

H

12V

H

H

L

H

@P0.0

X

Symbol

Parameter

Min

Max

Units

VPP

Programming Enable Voltage

11.5

12.5

V

IPP

Programming Enable Current

1.0

mA

1/tCLCL

Oscillator Frequency

4

24

MHz

tAVGL

Address Setup to

Low

48tCLCL

PROG

tGHAX

Address Hold After

48tCLCL

PROG

tDVGL

Data Setup to

Low

48tCLCL

PROG

tGHDX

Data Hold After

48tCLCL

PROG

tEHSH

P2.7

High to VPP

48tCLCL

(ENABLE)

tSHGL

VPP Setup to

Low

10

μs

PROG

tGLGH

Width

1

110

μs

PROG

tAVQV

Address to Data Valid

48tCLCL

tELQV

Low to Data Valid

48tCLCL

ENABLE

tEHQZ

Data Float After

0

48tCLCL

ENABLE

tGHBL

High to

Low

1.0

μs

PROG

BUSY

tWC

Byte Write Cycle Time

2.0

ms

AT89S53

Absolute Maximum Ratings*

*NOTICE: Stresses beyond those listed under “Absolute

Operating Temperature......................

-55°C to +125°C

Maximum Ratings” may cause permanent dam-

Storage Temperature.........................

-65°C to +150°C

age to the device. This is a stress rating only and

functional operation of the device at these or any

Voltage on Any Pin

other conditions beyond those indicated in the

with Respect to Ground

-1.0V to +7.0V

operational sections of this specification is not

implied. Exposure to absolute maximum rating

Maximum Operating Voltage

6.6V

conditions for extended periods may affect device

reliability.

DC Output Current .........................................

15.0 mA

Symbol

Parameter

Condition

Min

Max

Units

VIL

Input Low Voltage

(Except

-0.5

0.2 VCC - 0.1

V

EA)

VIL1

Input Low Voltage

-0.5

0.2 VCC - 0.3

V

(EA)

VIH

Input High Voltage

(Except XTAL1, RST)

0.2 VCC + 0.9

VCC + 0.5

V

VIH1

Input High Voltage

(XTAL1, RST)

0.7 VCC

VCC + 0.5

V

VOL

Output Low Voltage (1)

IOL = 1.6 mA

0.5

V

(Ports 1,2,3)

VOL1

Output Low Voltage (1)

IOL = 3.2 mA

0.5

V

(Port 0, ALE,

PSEN)

Output High Voltage

IOH = -60 μA, VCC = 5V ± 10%

2.4

V

VOH

IOH = -25 μA

0.75 VCC

V

(Ports 1,2,3, ALE,

PSEN)

IOH = -10 μA

0.9 VCC

V

Output High Voltage

IOH = -800 μA, VCC = 5V ± 10%

2.4

V

VOH1

IOH = -300 μA

0.75 VCC

V

(Port 0 in External Bus Mode)

IOH = -80 μA

0.9 VCC

V

IIL

Logical 0 Input Current (Ports 1,2,3)

VIN = 0.45V

-50

μA

ITL

Logical 1 to 0 Transition Current (Ports 1,2,3)

VIN = 2V

-650

μA

ILI

Input Leakage Current

0.45 < VIN < VCC

±10

μA

(Port 0, EA)

RRST

Reset Pulldown Resistor

50

300

KΩ

CIO

Pin Capacitance

Test Freq. = 1 MHz, TA = 25°C

10

pF

Power Supply Current

Active Mode, 12 MHz

25

mA

ICC

Idle Mode, 12 MHz

6.5

mA

Power Down Mode (2)

VCC = 6V

100

μA

VCC = 3V

40

μA

Notes: 1.

Under steady state (non-transient) conditions, IOL

Maximum total IOL for all output pins: 71 mA

must be externally limited as follows:

If IOL exceeds the test condition, VOL may exceed the

Maximum IOL per port pin: 10 mA

related specification. Pins are not guaranteed to sink

Maximum IOL per 8-bit port:

current greater than the listed test conditions.

Port 0: 26 mA

2. Minimum VCC for Power Down is 2V

Ports 1,2, 3: 15 mA

25