AT89C5132-RORUL Atmel, AT89C5132-RORUL Datasheet - Page 110
AT89C5132-RORUL
Manufacturer Part Number
AT89C5132-RORUL
Description
MCU 8051 FLASH USB 80TQFP
Manufacturer
Atmel
Series
AT89C513xr
Specifications of AT89C5132-RORUL
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
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
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Manufacturer
Quantity
Price
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18.3.3
110
AT89C5132
Baud Rate Selection
(Mode 0)
Figure 18-5. Reception Waveforms (Mode 0)
In mode 0, the baud rate can be either fixed or variable.
As shown in Figure 18-6, the selection is done using M0SRC bit in BDRCON register.
Figure 18-7 gives the baud rate calculation formulas for each baud rate source.
Figure 18-6. Baud Rate Source Selection (mode 0)
Figure 18-7. Baud Rate Formulas (Mode 0)
Write to SCON
a. Fixed Formula
Baud_Rate
RXD
TXD
RI
CLOCK
CLOCK
IBRG0
PER
=
F
PER
6
Set REN, Clear RI
D0
÷ 6
D1
D2
BDRCON.0
M0SRC
D3
0
1
D4
BRL= 256
Baud_Rate=
D5
To
Serial Port
b. Variable Formula
-
D6
6
(1-SPD)
6
(1-SPD)
D7
⋅
16
⋅
F
16
PER
⋅
F
Baud_Rate
PER
⋅
4173E–USB–09/07
(256 -BRL)
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