AT89C5132-ROTUL Atmel, AT89C5132-ROTUL Datasheet - Page 109

• Manufacturer Part Number: AT89C5132-ROTUL
• Description: IC 8051 MCU FLASH 64K USB 80TQFP
• Manufacturer: Atmel
• Series: AT89C513xr

Specifications of AT89C5132-ROTUL

• Core Processor: C52X2
• Core Size: 8-Bit
• Speed: 20MHz
• Connectivity: IDE/ATAPI, I²C, MMC, PCM, SPI, UART/USART, USB
• Peripherals: I²S, POR, WDT
• Number Of I /o: 44
• Program Memory Size: 64KB (64K x 8)
• Program Memory Type: FLASH
• Eeprom Size: 4K x 8
• Ram Size: 2.25K x 8
• Voltage - Supply (vcc/vdd): 2.7 V ~ 3.3 V
• Data Converters: A/D 2x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 80-TQFP, 80-VQFP
• Cpu Family: 89C
• Device Core: 8051
• Device Core Size: 8b
• Frequency (max): 40MHz
• Interface Type: IDE/SPI/UART/USB
• Total Internal Ram Size: 2.25KB
• # I/os (max): 44
• Number Of Timers - General Purpose: 2
• Operating Supply Voltage (typ): 3V
• Operating Supply Voltage (max): 3.3V
• Operating Supply Voltage (min): 2.7V
• On-chip Adc: 2-chx10-bit
• Instruction Set Architecture: CISC
• Operating Temp Range: -40C to 85C
• Operating Temperature Classification: Industrial
• Mounting: Surface Mount
• Pin Count: 80
• Package Type: TQFP
• Package: 80TQFP
• Family Name: 89C
• Maximum Speed: 40 MHz
• Operating Supply Voltage: 3 V
• Data Bus Width: 8 Bit
• Number Of Programmable I/os: 44
• Number Of Timers: 2
• Maximum Clock Frequency: 20 MHz
• Data Ram Size: 2304 B
• Mounting Style: SMD/SMT
• A/d Bit Size: 10 bit
• A/d Channels Available: 2
• Height: 1.45 mm
• Length: 14.1 mm
• Maximum Operating Temperature: + 85 C
• Minimum Operating Temperature: - 40 C
• Supply Voltage (max): 3.3 V
• Supply Voltage (min): 2.7 V
• Width: 14.1 mm
• For Use With: AT89OCD-01 - USB EMULATOR FOR AT8XC51 MCU
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

18.3.1
18.3.2
4173E–USB–09/07
Transmission
(Mode 0)
Reception
(Mode 0)
Figure 18-3. Serial I/O Port Block Diagram (Mode 0)
To start a transmission mode 0, write to SCON register clearing Bits SM0, SM1.
As shown in Figure 18-4, writing the byte to transmit to SBUF register starts the transmission.
Hardware shifts the LSB (D0) onto the RXD pin during the first clock cycle composed of a high
level then low level signal on TXD. During the eighth clock cycle the MSB (D7) is on the RXD
pin. Then, hardware drives the RXD pin high and asserts TI to indicate the end of the
transmission.
Figure 18-4. Transmission Waveforms (Mode 0)
To start a reception in mode 0, write to SCON register clearing SM0, SM1 and RI Bits and set-
ting the REN bit.
As shown in Figure 18-5, Clock is pulsed and the LSB (D0) is sampled on the RXD pin. The D0
bit is then shifted into the shift register. After eight sampling, the MSB (D7) is shifted into the shift
register, and hardware asserts RI bit to indicate a completed reception. Software can then read
the received byte from SBUF register.
Write to SBUF
SCON.6
SCON.1
M3 M2 M1 M0
SM1
Mode Decoder
TI
Controller
RXD
TXD
Mode
TI
SCON.7
SCON.0
SM0
RI
D0
D1
D2
D3
SBUF Rx SR
SBUF Tx SR
Baud Rate
Controller
D4
D5
D6
AT89C5132
D7
RXD
TXD
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