AT89C5122D-RDRUM Atmel, AT89C5122D-RDRUM Datasheet - Page 143

• Manufacturer Part Number: AT89C5122D-RDRUM
• Description: IC 8051 MCU 32K CRAM USB 64-VQFP
• Manufacturer: Atmel
• Series: 89Cr

Specifications of AT89C5122D-RDRUM

• Core Processor: 8051
• Core Size: 8-Bit
• Speed: 48MHz
• Connectivity: SmartCard, SPI, UART/USART, USB
• Peripherals: LED, POR, WDT
• Number Of I /o: 46
• Program Memory Size: 32KB (32K x 8)
• Program Memory Type: FLASH
• Ram Size: 768 x 8
• Voltage - Supply (vcc/vdd): 3 V ~ 5.5 V
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 64-TQFP, 64-VQFP
• For Use With: AT89OCD-01 - USB EMULATOR FOR AT8XC51 MCUAT89STK-10 - KIT EVAL APPL MASS STORAGEAT89STK-03 - KIT STARTER FOR MCU AT8XC5122/23
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Data Converters: -
• Other names: AT89C5122D-RDRUMTR

Serial Peripheral Status Register
(SPSTA)
4202F–SCR–07/2008
The
conditions:
•
•
•
Table 86. Serial Peripheral Status and Control Register - SPSTA (C4h)
Reset Value = 00X0XXXXb
Number
3 - 0
SPIF
Bit
Data transfer complete
Write collision
Inconsistent logic level on SS pin (mode fault error)
Serial Peripheral Status Register contains flags to signal the following
7
7
6
5
4
Mnemonic
SSERR
WCOL
MODF
WCOL
SPIF
Bit
6
-
Mode Description
R/W
RW
SSERR
R
R
R
R
5
Serial Peripheral data transfer flag
Clear 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.
Write Collision flag
Cleared by hardware to indicate that no collision has occurred or has
been approved by a clearing sequence.
Set by hardware to indicate that a collision has been detected.
Synchronous Serial Slave Error flag
Set by hardware when SS is modified before the end of a received data.
Cleared by disabling the SPI (clearing SPEN bit in SPCON).
Mode Fault
Cleared by hardware to indicate that the SS pin is at appropriate logic
level, or has been approved by a clearing sequence.
Set by hardware to indicate that the SS pin is at inappropriate logic level
Reserved
The value read from this bit is indeterminate. Do not change these bits.
AT83R5122, AT8xC5122/23
MODF
4
3
-
2
-
1
-
0
-
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