AT89C5132 Atmel Corporation, AT89C5132 Datasheet - Page 65

• Manufacturer Part Number: AT89C5132
• Manufacturer: Atmel Corporation

Specifications of AT89C5132

• Flash (kbytes): 64 Kbytes
• Max. Operating Frequency: 20 MHz
• Cpu: 8051-12C
• Max I/o Pins: 44
• Usb Transceiver: 1
• Usb Speed: Full Speed
• Usb Interface: Device
• Spi: 1
• Uart: 1
• Adc Channels: 2
• Adc Resolution (bits): 10
• Adc Speed (ksps): 22.7
• Sram (kbytes): 2.25
• Self Program Memory: API
• Operating Voltage (vcc): 2.7 to 3.6
• Timers: 2
• Isp: UART/USB
• Watchdog: Yes

4173E–USB–09/07
Reset Value = 1011 0010b
Table 53. AUDSTA Register
AUDSTA (S:9Ch Read Only) – Audio Interface Status Register
Reset Value = 1100 0000b
Table 54. AUDDAT Register
AUDDAT (S:9Dh) – Audio Interface Data Register
Bit Number
Bit Number
SREQ
AUD7
7-6
2-1
4-0
5
4
3
0
7
7
6
5
7
Mnemonic
Mnemonic
AUBUSY
MUDRN
MSREQ
DUP1:0
AUDEN
UDRN
SREQ
UDRN
AUD6
Bit
Bit
–
–
6
6
-
Description
Reserved
The value read from these bits is always 0. Do not set these bits.
Audio Sample Request Flag Mask Bit
Set to prevent the SREQ flag from generating an audio interrupt.
Clear to allow the SREQ flag to generate an audio interrupt.
Audio Sample Under-run Flag Mask Bit
Set to prevent the UDRN flag from generating an audio interrupt.
Clear to allow the UDRN flag to generate an audio interrupt.
Reserved
The value read from this bit is always 0. Do not set this bit.
Audio Duplication Factor
Refer to Table 50 for bits description.
Audio Interface Enable Bit
Set to enable the audio interface.
Clear to disable the audio interface.
Description
Audio Sample Request Flag
Set in C51 audio source mode when the audio interface request samples (buffer half
empty). This bit generates an interrupt if not masked and if enabled in IEN0.
Cleared by hardware when samples are loaded in AUDDAT.
Audio Sample Under-run Flag
Set in C51 audio source mode when the audio interface runs out of samples (buffer
empty). This bit generates an interrupt if not masked and if enabled in IEN0.
Cleared by hardware when samples are loaded in AUDDAT.
Audio Interface Busy Bit
Set in C51 audio source mode when the audio interface cannot accept more sample
(buffer full).
Cleared by hardware when buffer is no more full.
Reserved
The value read from these bits is always 0. Do not set these bits.
AUBUSY
AUD5
5
5
AUD4
4
4
-
AUD3
3
3
-
AUD2
2
2
-
AT89C5132
AUD1
1
1
-
AUD0
0
0
-
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