ATWEBDVK-02WC Atmel, ATWEBDVK-02WC Datasheet - Page 82

• Manufacturer Part Number: ATWEBDVK-02WC
• Description: KIT DEV TCP/IP AT89C51RD2 WEBCAM
• Manufacturer: Atmel
• Series: @Webr

Specifications of ATWEBDVK-02WC

• Main Purpose: *
• Embedded: *
• Utilized Ic / Part: AT89C51RD2
• Primary Attributes: *
• Secondary Attributes: *
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

82
AT89C51RD2/ED2
Note:
Note:
Table 18-1.
Reset
Idle (internal
code)
Idle (external
code)
Power-Down
(internal
code)
Power-Down
(external
code)
3. Generate an enabled external Keyboard interrupt (same behavior as external interrupt).
Mode
continue for a number of clock cycles before the internal reset algorithm takes
control. Reset initializes the AT89C51RD2/ED2 and vectors the CPU to address
0000h.
During the time that execution resumes, the internal RAM cannot be accessed; however, it is pos-
sible for the Port pins to be accessed. To avoid unexpected outputs at the Port pins, the instruction
immediately following the instruction that activated the Power-Down mode should not write to a
Port pin or to the external RAM.
Exit from power-down by reset redefines all the
content.
Pin Conditions in Special Operating Modes
Floating
Floating
Floating
Port 0
Data
Data
Port 1
High
Data
Data
Data
Data
Port 2
High
Data
Data
Data
Data
SFRs
Port 3
High
Data
Data
Data
Data
, but does not affect the internal RAM
Port 4
High
Data
Data
Data
Data
High
High
High
ALE
Low
Low
4235K–8051–05/08
PSEN#
High
High
High
Low
Low