AT89C51SND2C-7FTUL Atmel, AT89C51SND2C-7FTUL Datasheet - Page 177
AT89C51SND2C-7FTUL
Manufacturer Part Number
AT89C51SND2C-7FTUL
Description
IC 8051 MCU FLASH 64K MP3 100BGA
Manufacturer
Atmel
Series
89Cr
Datasheet
1.AT89C51SND2C-7FTUL.pdf
(242 pages)
Specifications of AT89C51SND2C-7FTUL
Core Processor
8051
Core Size
8-Bit
Speed
40MHz
Connectivity
I²C, IDE/ATAPI, MMC, SPI, UART/USART, USB
Peripherals
Audio, I²S, MP3, PCM, POR, WDT
Number Of I /o
32
Program Memory Size
64KB (64K x 8)
Program Memory Type
FLASH
Ram Size
2.25K x 8
Voltage - Supply (vcc/vdd)
2.7 V ~ 3.3 V
Data Converters
A/D 2x10b; D/A 2x20b
Oscillator Type
Internal
Operating Temperature
-40°C ~ 85°C
Package / Case
100-TFBGA
Data Bus Width
8 bit
Data Ram Size
2.25 KB
Interface Type
ATAPI, I2S, IDE, SPI, UART, USB
Maximum Clock Frequency
40 MHz
Number Of Programmable I/os
32
Number Of Timers
2
Maximum Operating Temperature
+ 85 C
Mounting Style
SMD/SMT
Minimum Operating Temperature
- 40 C
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Eeprom Size
-
Lead Free Status / Rohs Status
Details
Other names
AT89C51SND2C7FTUL
Available stocks
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Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
AT89C51SND2C-7FTUL
Manufacturer:
ATMEL
Quantity:
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20.7
4341H–MP3–10/07
Interrupt
The Serial I/O Port handles 2 interrupt sources that are the “end of reception” (RI in SCON) and
“end of transmission” (TI in SCON) flags. As shown in Figure 20-16 these flags are combined
together to appear as a single interrupt source for the C51 core. Flags must be cleared by soft-
ware 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 weather the framing error detection is enabled or dis-
abled, RI flag is set during the stop bit or during the ninth bit as detailed in Figure 20-17.
Figure 20-16. Serial I/O Interrupt System
Figure 20-17. Interrupt Waveforms
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
D2
b. Mode 2 and 3
D2
IEN0.4
a. Mode 1
ES
D3
D3
8-bit Data
AT8xC51SND2C/MP3B
9-bit data
D4
D4
Serial I/O
Interrupt Request
D5
D5
D6
D6
D7
D7
Stop Bit
D8
Stop bit
177
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