AT89C51AC3-RDTIM Atmel, AT89C51AC3-RDTIM Datasheet - Page 93
AT89C51AC3-RDTIM
Manufacturer Part Number
AT89C51AC3-RDTIM
Description
IC 8051 MCU FLASH 64K 64VQFP
Manufacturer
Atmel
Series
89Cr
Datasheet
1.AT89C51AC3-RLTUM.pdf
(140 pages)
Specifications of AT89C51AC3-RDTIM
Core Processor
8051
Core Size
8-Bit
Speed
60MHz
Connectivity
SPI, UART/USART
Peripherals
POR, PWM, WDT
Number Of I /o
36
Program Memory Size
64KB (64K x 8)
Program Memory Type
FLASH
Eeprom Size
2K x 8
Ram Size
2.25K x 8
Voltage - Supply (vcc/vdd)
3 V ~ 5.5 V
Data Converters
A/D 8x10b
Oscillator Type
External
Operating Temperature
-40°C ~ 85°C
Package / Case
64-TQFP, 64-VQFP
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
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4383D–8051–02/08
Reset Value = 00X0 XXXXb
Not Bit addressable
Number
Bit
4
3
2
1
0
Mnemonic Description
MODFIE
UARTM
SPTEIE
MODF
SPTE
Bit
Mode Fault
- Set by hardware to indicate that the SS pin is in inappropriate logic level (in both
master and slave modes).
- Cleared by hardware when reading SPSCR
When MODF error occurred:
- In slave mode: SPI interface ignores all transmitted data while SS remains high.
A new transmission is perform as soon as SS returns low.
- In master mode: SPI interface is disabled (SPEN=0, see description for SPEN
bit in SPCON register).
Serial Peripheral Transmit register Empty
- Set by hardware when transmit register is empty (if needed, SPDAT can be
loaded with another data).
- Cleared by hardware when transmit register is full (no more data should be
loaded in SPDAT).
Serial Peripheral UART mode
Set and cleared by software:
- Clear: Normal mode, data are transmitted MSB first (default)
- Set: UART mode, data are transmitted LSB first.
Interrupt Enable for SPTE
Set and cleared by software:
- Set to enable SPTE interrupt generation (when SPTE goes high, an interrupt is
generated).
- Clear to disable SPTE interrupt generation
Caution: When SPTEIE is set no interrupt generation occurred when SPIF flag
goes high. To enable SPIF interrupt again, SPTEIE should be cleared.
Interrupt Enable for MODF
Set and cleared by software:
- Set to enable MODF interrupt generation
- Clear to disable MODF interrupt generation
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