TS80C51RA2-VCA Atmel, TS80C51RA2-VCA Datasheet - Page 45

IC MCU 8BIT 256BYTE 40MHZ 40-DIP

TS80C51RA2-VCA

Manufacturer Part Number
TS80C51RA2-VCA
Description
IC MCU 8BIT 256BYTE 40MHZ 40-DIP
Manufacturer
Atmel
Series
80Cr
Datasheets

Specifications of TS80C51RA2-VCA

Core Processor
8051
Core Size
8-Bit
Speed
40/30MHz
Connectivity
UART/USART
Peripherals
POR, PWM, WDT
Number Of I /o
32
Program Memory Type
ROMless
Ram Size
256 x 8
Voltage - Supply (vcc/vdd)
4.5 V ~ 5.5 V
Oscillator Type
Internal
Operating Temperature
0°C ~ 70°C
Package / Case
40-DIP (0.600", 15.24mm)
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
Eeprom Size
-
Program Memory Size
-
Data Converters
-
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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