AT89C51SND2C-7FTUL Atmel, AT89C51SND2C-7FTUL Datasheet - Page 38

• Manufacturer Part Number: AT89C51SND2C-7FTUL
• Description: IC 8051 MCU FLASH 64K MP3 100BGA
• Manufacturer: Atmel
• Series: 89Cr

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

38
AT8xC51SND2C/MP3B
Table 9-2.
A low-priority interrupt is always interrupted by a higher priority interrupt but not by another inter-
rupt of lower or equal priority. Higher priority interrupts are serviced before lower priority
interrupts. The response to simultaneous occurrence of equal priority interrupts is determined by
an internal hardware polling sequence detailed in Table 9-3. Thus, within each priority level
there is a second priority structure determined by the polling sequence. The interrupt control
system is shown in Figure 9-1.
Table 9-3.
Interrupt Name
INT0
Timer 0
INT1
Timer 1
Serial Port
MP3 Decoder
Audio Interface
MMC Interface
Two Wire Controller
SPI Controller
A to D Converter
Keyboard
Reserved
USB
Reserved
IPHxx
0
0
1
1
Priority Levels
Priority within Same Level
14 (Lowest Priority)
0 (Highest Priority)
Priority Number
10
11
12
13
IPLxx
1
2
3
4
5
6
7
8
9
0
1
0
1
Interrupt Address Vectors
Priority Level
0 Lowest
1
2
3 Highest
C:000Bh
C:001Bh
C:002Bh
C:003Bh
C:004Bh
C:005Bh
C:006Bh
C:0003h
C:0013h
C:0023h
C:0033h
C:0043h
C:0053h
C:0063h
C:0073h
Cleared by Hardware (H)
Interrupt Request Flag
or by Software (S)
H if edge, S if level
H if edge, S if level
4341H–MP3–10/07
H
H
S
S
S
S
S
S
S
S
S
-
-