T89C51RD2-RDTIM datasheet(83/104 Pages) ATMEL

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T89C51RD2

4243G–8051–05/03

DC Parameters for Low

Voltage

TA = 0

°C to +70°C; V

SS = 0 V; VCC = 2.7 V to 3.6 V; F = 0 to 25 MHz

TA = -40

°C to +85°C; V

SS = 0 V; VCC = 2.7 V to 3.6 V; F = 0 to 25 MHz

4. Operating I

CC is measured with all output pins disconnected; XTAL1 driven with TCLCH, TCHCL = 5 ns (see Figure 36.), VIL =

SS + 0.5 V,

VIH = VCC - 0.5V; XTAL2 N.C.; EA = RST = Port 0 = VCC. ICC would be slightly higher if a crystal oscillator used (see Figure

33.).

5. Idle I

CC is measured with all output pins disconnected; XTAL1 driven with TCLCH, TCHCL = 5 ns, VIL = VSS + 0.5 V, VIH = VCC -

0.5 V; XTAL2 N.C; Port 0 = VCC; EA = RST = VSS (see Figure 34.).

6. Power Down I

CC is measured with all output pins disconnected; EA = VSS, PORT 0 = VCC; XTAL2 NC.; RST = VSS (see Fig-

ure 35.). In addition, the WDT must be inactive and the POF flag must be set.

7. Capacitance loading on Ports 0 and 2 may cause spurious noise pulses to be superimposed on the VOLs of ALE and Ports 1

and 3. The noise is due to external bus capacitance discharging into the Port 0 and Port 2 pins when these pins make 1 to 0

Table 45. DC Parameters for Low Voltage

Symbol

Parameter

Min

Typ(5)

Max

Unit

Test Conditions

Input Low Voltage

-0.5

0.2 V

CC - 0.1

Input High Voltage except XTAL1, RST

0.2 V

CC + 0.9

CC + 0.5

IH1

Input High Voltage, XTAL1, RST

0.7 V

CC + 0.5

Output Low Voltage, ports 1, 2, 3, 4 and 5 (6)

0.45

OL = 0.8 mA

(4)

OL1

Output Low Voltage, port 0, ALE, PSEN (6)

0.45

OL = 1.6 mA

(4)

Output High Voltage, ports 1, 2, 3, 4 and 5

0.9 V

OH = -10 µA

OH1

Output High Voltage, port 0, ALE, PSEN

0.9 V

OH = -40 µA

Logical 0 Input Current ports 1, 2, 3, 4 and 5

-50

µA

Vin = 0.45 V

Input Leakage Current

±10

µA

0.45 V < Vin < V

Logical 1 to 0 Transition Current, ports 1, 2, 3, 4

and 5

-650

µA

Vin = 2.0 V

RRST

RST Pulldown Resistor

200

Ω

CIO

Capacitance of I/O Buffer

Fc = 1 MHz

TA = 25

°C

Power Down Current

µAV

CC = 2.7 V to 3.6 V

(3)

CCOP

Power Supply Current on normal mode

0.6 Freq (MHz)

+ 3

CC = 3.6 V

(1)

ICCProgFlash

Power Supply Current during Flash Write / Erase

0.3 Freq

(MHz) + 10

0.4 Freq (MHz)

+ 12

VCC = 3.6 V

(1)

CCProgEE

Power Supply Current during EEprom data Write

/ Erase

0.7 Freq

(MHz) + 3

0.7 Freq (MHz)

+ 18

CC = 3.6 V

(1)

CCIDLE

Power Supply Current on idle mode

0.3 Freq (MHz)

+ 2

CC = 3.6 V

(2)

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