AT89LP828 Atmel Corporation, AT89LP828 Datasheet - Page 15

• Manufacturer Part Number: AT89LP828
• Manufacturer: Atmel Corporation

Specifications of AT89LP828

• Flash (kbytes): 8 Kbytes
• Max. Operating Frequency: 25 MHz
• Cpu: 8051-1C
• Max I/o Pins: 30
• Spi: 1
• Uart: 1
• Sram (kbytes): 0.75
• Eeprom (bytes): 1024
• Self Program Memory: IAP
• Operating Voltage (vcc): 2.4 to 5.5
• Timers: 3
• Isp: SPI/OCD
• Watchdog: Yes

4. Special Function Registers
A map of the on-chip memory area called the Special Function Register (SFR) space is shown in
Note that not all of the addresses are occupied, and unoccupied addresses may not be implemented 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.
Table 4-1.
Notes:
3654A–MICRO–8/09
0E8H
0E0H
0D8H
0D0H
0C8H
0C0H
0B8H
0B0H
0A8H
0A0H
0F8H
0F0H
98H
90H
88H
80H
1. All SFRs in the left-most column are bit-addressable.
2. Reset value is 1111 1111B when Tristate-port Fuse is enabled and 0000 0000B when disabled.
0000 0000
0000 0000
0000 0000
0000 0000
0000 0000
1111 1111
0000 0000
1111 1111
0000 0000
1111 1111
0000 0000
000x x000
xx11 1111
T2CON
SCON
TCON
SPSR
PSW
ACC
P4
P3
P2
P1
IP
IE
B
8
0
AT89LP428/828 SFR Map and Reset Values
0000 0000
0000 0000
0000 0000
0000 0000
0000 0000
0010 0100
0000 0000
0000 0111
xxxx xxxx
T2MOD
SADDR
TCONB
SADEN
T2CCA
TMOD
SPCR
SBUF
SP
9
1
0000 0000
0000 0000
0000 0000
0000 0000
0000 0000
0000 00x0
xxxx xxxx
0000 000
RCAP2L
GPMOD
P1M0
T2CCL
SPDR
DPCF
DP0L
RL0
TL0
A
2
(2)
0000 0000
0000 0000
0000 0000
0000 0000
0000 0000
0000 0000
0000 0000
RCAP2H
T2CCH
P1M1
GPLS
DP0H
RL1
TL1
B
3
0000 0000
0000 0000
0000 0000
0000 0000
0000 0000
xxxx x000
0000 000
P2M0
T2CCC
GPIEN
DP1L
RH0
TH0
TL2
IE2
C
4
(2)
0000 0000
0000 0000
0000 0000
0000 0000
0000 0000
0000 0000
0000 0000
xxxx x000
T2CCF
DP1H
P2M1
GPIF
RH1
TH2
TH1
IP2
D
5
(write-only)
MEMCON
0000 00xx
xxxx x000
WDTRST
xxxx xxx0
P3M0
P4M0
PAGE
IP2H
E
6
AT89LP428/828
(2)
(2)
Table
0000 0000
0000 0000
0000 0000
0000 x000
1100 0000
0000 0000
0000 x000
0000 0000
xx00 0000
WDTCON
CLKREG
ACSRB
ACSRA
PCON
AREF
P3M1
P4M1
4-1.
IPH
F
7
0FFH
0F7H
0EFH
0E7H
0DFH
0D7H
0CFH
0C7H
0BFH
0B7H
0AFH
0A7H
9FH
97H
8FH
87H
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