AT89LP51RB2 Atmel Corporation, AT89LP51RB2 Datasheet - Page 238

• Manufacturer Part Number: AT89LP51RB2
• Manufacturer: Atmel Corporation

Specifications of AT89LP51RB2

• Max. Operating Frequency: 20 MHz
• Cpu: 8051-1C
• Max I/o Pins: 42
• Spi: 1
• Twi (i2c): 1
• Uart: 1
• Adc Channels: 7
• Adc Resolution (bits): 10
• Adc Speed (ksps): 153.8
• Sram (kbytes): 1.375
• Self Program Memory: API
• Operating Voltage (vcc): 2.4 to 5.5
• Timers: 4
• Isp: SPI/OCD/UART
• Watchdog: Yes

25.12 Test Conditions
25.12.1
Note:
25.12.2
Note:
25.12.3
238
1. AC Inputs during testing are driven at V
1. For timing purposes, a port pin is no longer floating when a 100 mV change from load voltage occurs. A port pin begins to
AT89LP51RB2/RC2/IC2 Preliminary
AC Testing Input/Output Waveform
Float Waveform
I
CC
V
float when 100 mV change from the loaded V
IH
Test Condition: Active Mode
min. for a logic “1” and V
Figure 25-17. Connection Diagram for I
For active supply current measurements all ports are configured in quasi-bidirectional mode.
Timers 0, 1 and 2 are configured to be free running in their default timer modes. The CPU exe-
cutes a simple random number generator that accesses RAM, the SFR bus and exercises the
ALU and hardware multiplier.
(1)
IL
max. for a logic “0”.
Disconnected
DD
(1)
- 0.5V for a logic “1” and 0.45V for a logic “0”. Timing measurements are made at
OH
/V
CLOCK SIGNAL
OL
level occurs.
GND
(NC)
CC
V
DD
Active Measurement. All Other Pins are
RST
POL
X T AL 2
X T AL 1
GND
V
DD
I
CC
V
DD
3722A–MICRO–10/11