T89C51RD2-3CBC-L ATMEL [ATMEL Corporation], T89C51RD2-3CBC-L Datasheet - Page 2

• Manufacturer Part Number: T89C51RD2-3CBC-L
• Description: 0 to 40MHz Flash Programmable 8-bit Microcontroller
• Manufacturer: ATMEL [ATMEL Corporation]

T89C51RD2
3. Block Diagram
2
Power supply:
Temperature ranges: Commercial (0 to +70 C) and industrial (-40 to +85 C).
Packages: PDIL40, PLCC44, VQFP44, PLCC68, VQFP64
VQFP44 1.4
VQFP64 1.4
T89C51RD2
T89C51RD2
PLCC44
PLCC68
PDIL40
- M version: Commercial and industrial
4.5V to 5.5V : 40MHz X1 Mode, 20MHz X2 Mode
3V to 5.5V : 33MHz X1 Mode, 16 MHz X2 Mode
- L version: Commercial and industrial
2.7V to 3.6V : 25MHz X1 Mode, 12MHz X2 Mode
ALE/
XTAL1
XTAL2
PSEN
PROG
WR
RD
EA
(3)
(3)
Flash (bytes)
Flash (bytes)
64k
64k
CPU
(3)
(3) (3)
EUART
Timer 0
Timer 1
(3)
EEPROM (bytes)
CORE
C51
EEPROM
(3) (3)
(bytes)
256x8
RAM
INT
Ctrl
Table 1. Memory Size
2k
2k
(2): Only available on high pin count packages
(3): Alternate function of Port 3
(1): Alternate function of Port 1
IB-bus
Port 0 Port 1 Port 2 Port 3
Flash
64Kx8
XRAM (bytes)
Parallel I/O Ports & Ext. Bus
XRAM (bytes)
1024
1024
XRAM
1Kx8
Port 4
EEPROM
(2)
2Kx8
TOTAL RAM
TOTAL RAM
Port 5
(2)
(bytes)
(1)
(bytes)
1280
1280
PCA
Watch
(1)
Dog
Rev. F - 15 February, 2001
(1)
Timer2
(1)
I/O
I/O
48
32