AT89C51RB2-3CSUM Atmel, AT89C51RB2-3CSUM Datasheet - Page 83
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AT89C51RB2-3CSUM
Manufacturer Part Number
AT89C51RB2-3CSUM
Description
IC 8051 MCU 16K FLASH 40-DIP
Manufacturer
Atmel
Series
89Cr
Datasheet
1.AT89C51RB2-RLTIL.pdf
(127 pages)
Specifications of AT89C51RB2-3CSUM
Core Processor
8051
Core Size
8-Bit
Speed
60MHz
Connectivity
SPI, UART/USART
Peripherals
POR, PWM, WDT
Number Of I /o
32
Program Memory Size
16KB (16K x 8)
Program Memory Type
FLASH
Ram Size
1.25K x 8
Voltage - Supply (vcc/vdd)
2.7 V ~ 5.5 V
Oscillator Type
External
Operating Temperature
-40°C ~ 85°C
Package / Case
40-DIP (0.600", 15.24mm)
Processor Series
AT89x
Core
8051
Data Bus Width
8 bit
Data Ram Size
1280 B
Interface Type
UART, SPI
Maximum Clock Frequency
60 MHz
Number Of Programmable I/os
32
Number Of Timers
3
Operating Supply Voltage
2.7 V to 5.5 V
Maximum Operating Temperature
+ 85 C
Mounting Style
Through Hole
3rd Party Development Tools
PK51, CA51, A51, ULINK2
Minimum Operating Temperature
- 40 C
Package
40PDIP
Device Core
80C51
Family Name
AT89
Maximum Speed
60 MHz
For Use With
AT89OCD-01 - USB EMULATOR FOR AT8XC51 MCUAT89STK-11 - KIT STARTER FOR AT89C51RX2
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Eeprom Size
-
Data Converters
-
Lead Free Status / Rohs Status
Details
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
AT89C51RB2-3CSUM
Manufacturer:
ATMEL
Quantity:
6 480
Company:
Part Number:
AT89C51RB2-3CSUM
Manufacturer:
ATMEL
Quantity:
20
Figure 34. Power-down Exit Waveform
Table 62. State of Ports
4180E–8051–10/06
Power Down
Power Down
Mode
Idle
Idle
or
XTALB
XTALA
INT0
INT1
Program Memory
Active Phase
External
External
Internal
Internal
be the one following the instruction that puts the AT89C51RB2/RC2 into Power-down
mode.
Exit from Power-down by reset redefines all the SFRs, exit from Power-down by exter-
nal interrupt does no affect the SFRs.
Exit from Power-down by either reset or external interrupt or keyboard interrupt does not
affect the internal RAM content.
Note:
Table 62 shows the state of ports during idle and power-down modes.
Port 0 can force a 0 level. A "one" will leave port floating.
ALE
If idle mode is activated with Power-down mode (IDL and PD bits set), the exit sequence
is unchanged, when execution is vectored to interrupt, PD and IDL bits are cleared and
idle mode is not entered.
1
1
0
0
Power-down Phase
PSEN
1
0
0
1
Port Data
Port Data
Oscillator Restart Phase
PORT0
Floating
Floating
(1)
(1)
Port Data
Port Data
Port Data
Port Data
PORT1
AT89C51RB2/RC2
Active Phase
Port Data
Port Data
Port Data
PORT2
Address
Port Data
Port Data
Port Data
Port Data
PORT3
83