AT80C51SND1C-ROTIL Atmel, AT80C51SND1C-ROTIL Datasheet - Page 40

• Manufacturer Part Number: AT80C51SND1C-ROTIL
• Description: IC MCU FLASH MP3 DECODER 80-TQFP
• Manufacturer: Atmel
• Series: 80Cr

Specifications of AT80C51SND1C-ROTIL

• 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: 44
• Program Memory Type: ROMless
• 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: Contains lead / RoHS non-compliant
• Eeprom Size: -
• Program Memory Size: -
• Other names: AT80C51SND1CROTIL

40
AT8xC51SND1C
Table 50. Priority Levels
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 51. 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 51. Priority within Same Level
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
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
Priority Level
0 Lowest
1
2
3 Highest
Interrupt Address
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
Vectors
Interrupt Request Flag
(H) or by Software (S)
Cleared by Hardware
H if edge, S if level
H if edge, S if level
4109L–8051–02/08
H
H
S
S
S
S
S
S
S
S
S
-
-