AT89C5132-ROTUL Atmel, AT89C5132-ROTUL Datasheet - Page 116

• 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

18.6.3
18.7
18.8
116
Interrupt
Registers
AT89C5132
Reset Address
On reset, the SADDR and SADEN registers are initialized to 00h, i.e. the given and broadcast
addresses are XXXX XXXXb (all don’t-care bits). This ensures that the Serial Port is backwards
compatible with the 80C51 microcontrollers that do not support automatic address recognition.
The Serial I/O Port handles two interrupt sources that are the “end of reception” (RI in SCON)
and “end of transmission” (TI in SCON) flags. As shown in Figure 18-16 these flags are com-
bined together to appear as a single interrupt source for the C51 core. Flags must be cleared by
software when executing the serial interrupt service routine.
The serial interrupt is enabled by setting ES bit in IEN0 register. This assumes interrupts are glo-
bally enabled by setting EA bit in IEN0 register.
Depending on the selected mode and whether the framing error detection is enabled or not, RI
flag is set during the stop bit or during the ninth bit as detailed in Figure 18-17.
Figure 18-16. Serial I/O Interrupt System
Figure 18-17. Interrupt Waveforms
Table 91. SCON Register
SMOD0 = X
SMOD0 = 1
SMOD0 = 0
SMOD0 = 1
SMOD0 = 1
RXD
RXD
FE
FE
RI
RI
RI
Start Bit
Start bit
SCON.0
SCON.1
RI
TI
D0
D0
D1
D1
b. Mode 2 and 3
D2
D2
IEN0.4
a. Mode 1
ES
D3
D3
8-bit Data
9-bit data
D4
D4
Serial I/O
Interrupt Request
D5
D5
D6
D6
D7
D7
Stop Bit
D8
4173E–USB–09/07
Stop bit