AT89C51ID2-SLRUM Atmel, AT89C51ID2-SLRUM Datasheet - Page 17
AT89C51ID2-SLRUM
Manufacturer Part Number
AT89C51ID2-SLRUM
Description
IC 8051 MCU 64K FLASH 44-PLCC
Manufacturer
Atmel
Series
89Cr
Datasheet
1.AT89C51ID2-RLTUM.pdf
(157 pages)
Specifications of AT89C51ID2-SLRUM
Core Processor
8051
Core Size
8-Bit
Speed
60MHz
Connectivity
I²C, SPI, UART/USART
Peripherals
POR, PWM, WDT
Number Of I /o
34
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
44-PLCC
Processor Series
AT89x
Core
8051
Data Bus Width
8 bit
Data Ram Size
2 KB
Interface Type
UART, SPI, TWI
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
Other names
AT89C51ID2-SLRUMTR
Available stocks
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Part Number
Manufacturer
Quantity
Price
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Functional Block
Diagram
Figure 2. Functional Oscillator Block Diagram
Operating Modes
Reset
Functional Modes
Normal Modes
17
XtalA1
XtalA2
AT89C51ID2
PwdOscA
XtalB1
XtalB2
OSCCON
OscAEn
OscA
PwdOscB
FOSCA
OSCCON
OscB
OscBEn
:2
Reset
A hardware RESET puts the Clock generator in the following state:
The selected oscillator depends on OSC bit in Hardware Security Byte (HSB).
HSB.OSC = 1 (Oscillator A selected)
•
•
HSB.OSC = 0 (Oscillator B selected)
•
•
•
•
•
•
OscAEn = 1 & OscBEn = 0: OscA is running, OscB is stopped.
CKS = 1: OscA is selected for CPU.
OscAEn = 0 & OscBEn = 1: OscB is running, OscA is stopped.
CKS = 0: OscB is selected for CPU.
CPU and Peripherals clock depend on the software selection using CKCON0,
CKCON1 and CKRL registers
CKS bit in CKSEL register selects either OscA or OscB
CKRL register determines the frequency of the OscA clock.
It is always possible to switch dynamically by software from OscA to OscB, and vice
versa by changing CKS bit.
CKCON0
CKRL
X2
0
1
Prescaler-Divider
8-bit
Reload
CKRL=0xFF?
FOSCB
0
1
CKSEL
CKS
1
0
:128
Idle
CLK
PERIPH
CLK
CPU
Sub
Clock
Peripheral Clock
4289C–8051–11/05
CPU clock
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