AT89LP2052 Atmel Corporation, AT89LP2052 Datasheet - Page 6

• Manufacturer Part Number: AT89LP2052
• Manufacturer: Atmel Corporation

Specifications of AT89LP2052

• Flash (kbytes): 2 Kbytes
• Max. Operating Frequency: 20 MHz
• Cpu: 8051-1C
• Max I/o Pins: 15
• Spi: 1
• Uart: 1
• Sram (kbytes): 0.25
• Operating Voltage (vcc): 2.4 to 5.5
• Timers: 2
• Isp: SPI
• Watchdog: Yes

6. Special Function Registers
Table 6-1.
Note:
6
0D8H
0D0H
0C8H
0C0H
0E8H
0E0H
0B8H
0B0H
0A8H
0A0H
0F8H
0F0H
98H
90H
88H
80H
*These SFRs are bit-addressable.
AT89LP2052/LP4052
0000 0000
0000 0000
0000 0000
1111 1111
0000 0000
1111 1111
0000 0000
x0x0 0000
00x0 0000
SCON*
TCON*
PSW*
ACC*
P3*
P1*
IP*
IE*
B*
AT89LP2052/LP4052 SFR Map and Reset Values
0000 0000
0000 0000
0010 0100
0000 0000
0000 0111
xxxx xxxx
SADEN
SADDR
TCONB
TMOD
SBUF
A map of the on-chip memory area called the Special Function Register (SFR) space is shown in
Table
Note that not all of the addresses are occupied, and unoccupied addresses may not be imple-
mented on the chip. Read accesses to these addresses will in general return random data, and
write accesses will have an indeterminate effect. User software should not write to these unlisted
locations, since they may be used in future products to invoke new features.
SP
6-1.
1111 1111
0000 0000
0000 0000
0000 0000
000x xx00
SPSR
P1M0
DPL
RL0
TL0
0000 0000
0000 0000
0000 0000
0000 0000
P1M1
DPH
RL1
TL1
0000 0000
0000 0000
RH0
TH0
0000 0000
0000 0000
0000 0000
SPCR
RH1
TH1
(write-only)
1111 1111
WDTRST
xxxx xxxx
SPDR
P3M0
0000 0000
x0x0 0000
0000 x000
xx00 0000
000x 0000
WDTCON
PCON
ACSR
P3M1
IPH
3547J–MICRO–10/09
0FFH
0F7H
0EFH
0E7H
0DFH
0D7H
0CFH
0C7H
0BFH
0B7H
0AFH
0A7H
9FH
97H
8FH
87H