AT87C51RC2-3CSUM Atmel, AT87C51RC2-3CSUM Datasheet - Page 45
AT87C51RC2-3CSUM
Manufacturer Part Number
AT87C51RC2-3CSUM
Description
IC 8051 MCU 32K OTP 40MHZ 40DIP
Manufacturer
Atmel
Series
87Cr
Datasheet
1.TS87C51RB2-VIA.pdf
(86 pages)
Specifications of AT87C51RC2-3CSUM
Core Processor
8051
Core Size
8-Bit
Speed
40/20MHz
Connectivity
UART/USART
Peripherals
POR, PWM, WDT
Number Of I /o
32
Program Memory Size
32KB (32K x 8)
Program Memory Type
OTP
Ram Size
512 x 8
Voltage - Supply (vcc/vdd)
4.5 V ~ 5.5 V
Oscillator Type
Internal
Operating Temperature
-40°C ~ 85°C
Package / Case
40-DIP (0.600", 15.24mm)
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Eeprom Size
-
Data Converters
-
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Figure 6-14. Power-Down Exit Waveform
4188F–8051–01/08
XTAL1
INT0
INT1
Active phase
Exit from power-down by reset redefines all the SFRs, exit from power-down by external inter-
rupt does no affect the SFRs.
Exit from power-down by either reset or external interrupt does not affect the internal RAM
content.
Note:
Table 6-20.
* Port 0 can force a "zero" level. A "one" will leave port floating.
Power-down
Power-down
Mode
Idle
Idle
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.
Program
Memory
The state of ports during idle and power-down mode
External
External
Internal
Internal
Power-down phase
ALE
1
1
0
0
Oscillator restart phase
PSEN
1
1
0
0
Port Data*
Port Data*
Floating
Floating
PORT0
Active phase
Port Data
Port Data
Port Data
Port Data
PORT1
AT/TS8xC51Rx2
Port Data
Port Data
Port Data
Address
PORT2
Port Data
Port Data
Port Data
Port Data
PORT3
45
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