AT89C51AC3 Atmel Corporation, AT89C51AC3 Datasheet - Page 122

• Manufacturer Part Number: AT89C51AC3
• Manufacturer: Atmel Corporation

Specifications of AT89C51AC3

• Flash (kbytes): 64 Kbytes
• Max. Operating Frequency: 60 MHz
• Cpu: 8051-12C
• Max I/o Pins: 32
• Spi: 1
• Uart: 1
• Adc Channels: 8
• Adc Resolution (bits): 10
• Adc Speed (ksps): 62.5
• Sram (kbytes): 2.25
• Eeprom (bytes): 2048
• Self Program Memory: API
• Operating Voltage (vcc): 3.0 to 5.5
• Timers: 4
• Isp: UART
• Watchdog: Yes

Table 71. DC Parameters in Standard Voltage (Continued)
Notes:
122
Symbol
I
CC
1. Operating I
2. Idle I
3. Power-down I
4. Capacitance loading on Ports 0 and 2 may cause spurious noise pulses to be superimposed on the V
5. Typicals are based on a limited number of samples and are not guaranteed. The values listed are at room temperature.
6. Under steady state (non-transient) conditions, I
AT89C51AC3
V
V
64.).
0.5V; XTAL2 N.C; Port 0 = V
ure 66.). In addition, the WDT must be inactive and the POF flag must be set.
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
transitions during bus operation. In the worst cases (capacitive loading 100pF), the noise pulse on the ALE line may exceed
0.45V with maxi V
Maximum I
Maximum I
Port 0: 26 mA
Ports 1, 2, 3 and 4: 15 mA
Maximum total I
If I
than the listed test conditions.
Parameter
Power Supply Current
SS
IH
OL
= V
+ 0.5V,
CC
exceeds the test condition, V
CC
is measured with all output pins disconnected; XTAL1 driven with T
- 0.5V; XTAL2 N.C.; EA = RST = Port 0 = V
OL
OL
CC
CC
per port pin: 10 mA
per 8-bit port:
is measured with all output pins disconnected; XTAL1 driven with T
OL
is measured with all output pins disconnected; EA = V
OL
for all output pins: 71 mA
peak 0.6V. A Schmitt Trigger use is not necessary.
Figure 64. I
CC
; EA = RST = V
OL
may exceed the related specification. Pins are not guaranteed to sink current greater
CLOCK
SIGNAL
CC
Test Condition, Active Mode
(NC)
I
I
CCOP
CCIDLE
SS
OL
V
(see Figure 65.).
must be externally limited as follows:
CC
= 0.4 Frequency (MHz) + 8
Min
= 0.2 Frequency (MHz) + 8
CC
RST
XTAL2
XTAL1
V
SS
. I
CC
would be slightly higher if a crystal oscillator used (see Figure
V
EA
CC
I
P0
CC
Typ
V
(5)
CC
V
CC
CC
, PORT 0 = V
CLCH
, T
Max
CLCH
CHCL
All other pins are disconnected.
, T
CC
= 5 ns, V
CHCL
; XTAL2 NC.; RST = V
Unit
mA
= 5 ns (see Figure 67.), V
IL
= V
Vcc = 5.5V
OL
4383D–8051–02/08
SS
s of ALE and Ports 1
Test Conditions
+ 0.5V, V
(1)(2)
SS
IH
(see Fig-
= V
CC
IL
=
-