AT89C51RE2-SLRUM Atmel, AT89C51RE2-SLRUM Datasheet - Page 158
AT89C51RE2-SLRUM
Manufacturer Part Number
AT89C51RE2-SLRUM
Description
MCU 8051 128K FLASH 44-PLCC
Manufacturer
Atmel
Series
89Cr
Datasheet
1.AT89C51RE2-SLSUM.pdf
(187 pages)
Specifications of AT89C51RE2-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
128KB (128K x 8)
Program Memory Type
FLASH
Ram Size
8K 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
8 KB
Interface Type
UART, SPI
Maximum Clock Frequency
60 MHz
Number Of Programmable I/os
34
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
Development Tools By Supplier
AT89OCD-01
For Use With
AT89STK-11 - KIT STARTER FOR AT89C51RX2
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Eeprom Size
-
Data Converters
-
Lead Free Status / Rohs Status
Details
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
AT89C51RE2-SLRUM
Manufacturer:
Atmel
Quantity:
759
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Serial Peripheral Status
Register and Control
(SPSCR)
158
AT89C51RE2
Reset Value = 0001 0100b
Not bit addressable
The Serial Peripheral Status Register contains flags to signal the following conditions:
•
•
•
Table 116. SPSCR Register
SPSCR - Serial Peripheral Status and Control register (C4H)
Bit Number
Bit Number
SPIF
Data transfer complete
Write collision
Inconsistent logic level on SS pin (mode fault error)
7
7
6
5
3
2
1
0
Mnemonic
SPIF
OVR
Bit
6
-
-
Bit Mnemonic
CPHA
CPOL
SPR1
SPR0
Description
Serial Peripheral Data Transfer Flag
Cleared by hardware to indicate data transfer is in progress or has been approved by a
clearing sequence.
Set by hardware to indicate that the data transfer has been completed.
This bit is cleared when reading or writing SPDATA after reading SPSCR.
Reserved
Overrun Error Flag
- Set by hardware when a byte is received whereas SPIF is set (the previous received
data is not overwritten).
- Cleared by hardware when reading SPSCR
OVR
5
The value read from this bit is indeterminate. Do not set this bit.
Description
Clock Polarity
Cleared to have the SCK set to’0’ in idle state.
Set to have the SCK set to’1’ in idle state.
Clock Phase
Cleared to have the data sampled when the SCK leaves the idle state (see
CPOL).
Set to have the data sampled when the SCK returns to idle state (see
CPOL).
SPR2
0
0
0
0
1
1
1
1
MODF
4
SPR1
0
0
1
1
0
0
1
1
SPR0 Serial Peripheral Rate
0
1
0
1
0
1
0
1
SPTE
3
F
F
Invalid
F
F
F
F
Invalid
CLK PERIPH
CLK PERIPH
CLK PERIPH
CLK PERIPH
CLK PERIPH
CLK PERIPH
UARTM
/16
/32
2
/4
/8
/64
/128
SPTEIE
1
7663E–8051–10/08
MODFIE
0
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