Rainbow Electronics T89C51RD2 - Manual (Page 2)

2 Rev. F - 15 February, 2001
T89C51RD2
•
Power supply:
- 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
•
Temperature ranges: Commercial (0 to +70
°
C) and industrial (-40 to +85
°
C).
•
Packages: PDIL40, PLCC44, VQFP44, PLCC68, VQFP64
Table 1. Memory Size
3. Block Diagram
PDIL40
PLCC44
VQFP44 1.4
Flash (bytes) EEPROM (bytes) XRAM (bytes)
TOTAL RAM
(bytes)
I/O
T89C51RD2 64k 2k 1024 1280 32
PLCC68
VQFP64 1.4
Flash (bytes)
EEPROM
(bytes)
XRAM (bytes)
TOTAL RAM
(bytes)
I/O
T89C51RD2 64k 2k 1024 1280 48
Timer 0 INT
RAM
256x8
T0 T1
RxD TxD
WR
RD
EA
PSEN
ALE/
XTAL2
XTAL1
EUART
CPU
Timer 1
INT1
Ctrl
INT0
(3)
(3)
C51
CORE
(3) (3) (3) (3)
Port 0
P0
Port 1 Port 2 Port 3
Parallel I/O Ports & Ext. Bus
P1 P2 P3
XRAM
1Kx8
IB-bus
PCA
RESET
PROG
Watch
Dog
PCA ECI Vss V
CC
(3) (3) (1)
(1): Alternate function of Port 1
(3): Alternate function of Port 3
(1)
Timer2
T2EX T2
(1) (1)
Port 5 Port 4
P5 P4
(2): Only available on high pin count packages
(2) (2)
Flash
64Kx8
EEPROM
2Kx8