T89C51RB2-SLSCM View Datasheet(PDF) - Atmel Corporation
Part Name
Description
Manufacturer
T89C51RB2-SLSCM Datasheet PDF : 9 Pages
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T89C51RB2/RC2
• Hardware Watchdog Timer (One-time enabled with Reset-Out)
• Power control modes:
• Idle Mode.
• Power-down mode.
- 50µA at 3V
- 100µA Commercial at 5V
- 150µA Industrial at 5V
• Power-Off Flag.
• Power supply: 4.5 to 5.5V or 2.7 to 3.6V
• Temperature ranges: Commercial (0 to +70°C) and industrial (-40°C to +85°C).
• Packages: PDIL40, PLCC44, VQFP44
Table 1. Memory Size
Flash (bytes)
XRAM (bytes)
TOTAL RAM
(bytes)
I/O
T89C51RB2
16k
1024
1280
32
T89C51RC2
32k
1024
1280
32
3. Block Diagram
XTAL1
XTAL2
ALE/ PROG
PSEN
EA
RD (2)
WR (2)
(2) (2)
(1) (1) (1) (1)
EUART
+
BRG
RAM
256x8
Flash
32Kx8 or
16Kx8
XRAM
1Kx8
Boot
ROM
2Kx8
CPU
C51
CORE
IB-bus
PCA
Timer2
Timer 0 INT
Timer 1 Ctrl
(2) (2) (2) (2)
Parallel I/O Ports & Ext. Bus
Watch Key
Dog Board
SPI
Port 0 Port 1 Port 2 Port 3 Port I2
(1) (1) (1) (1)
(1): Alternate function of Port 1
(2): Alternate function of Port 3
2
Rev. B - 30-Mar-01
Preliminary
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