AT89S8252-24PI Atmel, AT89S8252-24PI Datasheet - Page 6

• Manufacturer Part Number: AT89S8252-24PI
• Description: MCU W/SPI 8KB FLSH 2K EEP 40-DIP
• Manufacturer: Atmel
• Series: 89Sr

Specifications of AT89S8252-24PI

• Core Processor: 8051
• Core Size: 8-Bit
• Speed: 24MHz
• Connectivity: SPI, UART/USART
• Peripherals: POR, WDT
• Number Of I /o: 32
• Program Memory Size: 8KB (8K x 8)
• Program Memory Type: FLASH
• Eeprom Size: 2K x 8
• Ram Size: 256 x 8
• Voltage - Supply (vcc/vdd): 4 V ~ 6 V
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 40-DIP (0.600", 15.24mm)
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Data Converters: -
• Other names: AT89S825224PI

Special Function
Registers
Table 1. AT89S8252 SFR Map and Reset Values
6
0F8H
0F0H
0E8H
0E0H
0D8H
0D0H
0C8H
0C0H
0B8H
0B0H
0A8H
0A0H
98H
90H
88H
80H
AT89S8252
XX000000
0X000000
00000000
00000000
00000000
00000000
11111111
11111111
00000000
11111111
00000000
11111111
T2CON
SCON
TCON
PSW
ACC
P3
P2
P1
P0
IP
IE
B
XXXXXXXX
XXXXXX00
00000000
00000111
T2MOD
TMOD
SBUF
SP
A map of the on-chip memory area called the Special Function Register (SFR) space is
shown in Table 1.
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 ran-
dom data, and write accesses will have an indeterminate effect.
User software should not write 1s to these unlisted locations, since they may be used in
future products to invoke new features. In that case, the reset or inactive values of the
new bits will always be 0.
Timer 2 Registers Control and status bits are contained in registers T2CON (shown in
Table 2) and T2MOD (shown in Table 9) for Timer 2. The register pair (RCAP2H,
RCAP2L) are the Capture/Reload registers for Timer 2 in 16-bit capture mode or 16-bit
auto-reload mode.
00XXXXXX
00000000
00000000
00000000
RCAP2L
SPSR
DP0L
TL0
00000000
00000000
00000000
RCAP2H
DP0H
TL1
00000000
00000000
00000000
DP1L
TH0
TL2
000001XX
00000000
00000000
00000000
SPCR
DP1H
TH2
TH1
XXXXXXXX
00000010
WMCON
SPDR
0XXX0000
PCON
0401G–MICRO–3/06
0FFH
0EFH
0E7H
0D7H
0C7H
0BFH
0B7H
0AFH
0A7H
0F7H
0DF
0CF
9FH
97H
8FH
87H
H
H