AT89C51ID2-SLSIM Atmel, AT89C51ID2-SLSIM Datasheet - Page 3

• Manufacturer Part Number: AT89C51ID2-SLSIM
• Description: C51ID2 64KF TWI 32KHZ PLCC44 3-5.5V IND.
• Manufacturer: Atmel

Block Diagram
Figure 1. Block Diagram
4289C–8051–11/05
XTALB1(1)
ALE/
XTALB2
XTALA1
XTALA2
PSEN
PROG
WR
RD
EA
(2)
(2)
CPU
(2)
(2) (2)
EUART
Timer 0
Timer 1
(2)
CORE
C51
(2) (2)
256x8
RAM
Ctrl
INT
(1): Alternate function of Port 1
(2): Alternate function of Port 3
(3): Alternate function of Port I2
IB-bus
Port 0 Port 1
Flash
64Kx8
Parallel I/O Ports &
External Bus
Port 2
1792 x 8
XRAM
Port 3
(1)
Port4
PCA
Port 5
(1)
(1)
(3) (3)
Timer2
TWI
(1)
(1) (1) (1)(1)
Keyboard
SPI
AT89C51ID2
(1)
BOOT
2K x8
ROM
Watch
Dog
POR
PFD
Regulator
POR / PFD
E² DATA
2K x 8
3