AT89C51ED2-SMRUM Atmel, AT89C51ED2-SMRUM Datasheet - Page 16
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AT89C51ED2-SMRUM
Manufacturer Part Number
AT89C51ED2-SMRUM
Description
IC MCU FLASH 8051 64K 5V 68PLCC
Manufacturer
Atmel
Series
89Cr
Datasheet
1.ATWEBDVK-02RC.pdf
(137 pages)
Specifications of AT89C51ED2-SMRUM
Core Processor
8051
Core Size
8-Bit
Speed
60MHz
Connectivity
SPI, UART/USART
Peripherals
POR, PWM, WDT
Number Of I /o
50
Program Memory Size
64KB (64K x 8)
Program Memory Type
FLASH
Eeprom Size
2K x 8
Ram Size
2K x 8
Voltage - Supply (vcc/vdd)
2.7 V ~ 5.5 V
Oscillator Type
External
Operating Temperature
-40°C ~ 85°C
Package / Case
68-PLCC
Processor Series
AT89x
Core
8051
Data Bus Width
8 bit
Data Ram Size
2 KB
Interface Type
UART, SPI
Maximum Clock Frequency
60 MHz
Number Of Programmable I/os
32
Number Of Timers
3
Operating Supply Voltage
2.7 V to 5.5 V
Mounting Style
SMD/SMT
3rd Party Development Tools
PK51, CA51, A51, ULINK2
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Data Converters
-
Lead Free Status / Rohs Status
Details
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
6.2
Figure 6-1.
6.2.1
16
Xtal2
Xtal1
Functional Block Diagram
AT89C51RD2/ED2
Prescaler Divider
Functional Oscillator Block Diagram
Osc
F
F
In X2 Mode, for CKRL<>0xFF:
In X1 Mode, for CKRL<>0xFF then:
F
F
OSC
CLK CPU
• A hardware RESET puts the prescaler divider in the following state:
• Any value between FFh down to 00h can be written by software into CKRL register in order to
CPU
CPU
divide frequency of the selected oscillator:
• CKRL = FFh: F
•
•
=
=
:2
Reset
F
F
F
F
CKRL = 00h: minimum frequency
CKRL = FFh: maximum frequency
F
F
CLK CPU
CLK CPU
CLK CPU
CLK CPU
and F
CLKPERIPH
CLKPERIPH
CKCON0
CKRL
CLK PERIPH
X2
0
1
= F
= F
= F
= F
CLK PERIPH
CLK PERIPH
CLK PERIPH
CLK PERIPH
=
=
CLK CPU
---------------------------------------------- -
2
---------------------------------------------- -
4
Prescaler-Divider
×
×
(
(
255 CKRL
255 CKRL
F
F
8-bit
= F
= F
OSC
OSC
= F
= F
= F
–
–
Reload
OSC
OSC
OSC
OSC
CLK PERIPH
/1020 (Standard Mode)
/510 (X2 Mode)
/2 (Standard Mode)
(X2 Mode)
)
)
CKRL = 0xFF?
= F
OSC
1
0
/2 (Standard C51 feature)
Idle
CLK
Periph
CLK
CPU
Peripheral Clock
CPU Clock
4235K–8051–05/08