AT89C51SND1C-ROTUL Atmel, AT89C51SND1C-ROTUL Datasheet - Page 95
![IC 8051 MCU FLASH 64K MP3 80TQFP](/photos/12/13/121358/313-80-tqfp_sml.jpg)
AT89C51SND1C-ROTUL
Manufacturer Part Number
AT89C51SND1C-ROTUL
Description
IC 8051 MCU FLASH 64K MP3 80TQFP
Manufacturer
Atmel
Series
89Cr
Datasheet
1.AT80C51SND1C-ROTIL.pdf
(213 pages)
Specifications of AT89C51SND1C-ROTUL
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 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
Oscillator Type
External
Operating Temperature
-40°C ~ 85°C
Package / Case
80-TQFP, 80-VQFP
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Eeprom Size
-
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15.8.3
4109L–8051–02/08
Upstream Resume
The firmware has to clear the SPINT bit in the USBINT register before any other USB operation
in order to wake up the USB controller from its Suspend mode.
The USB controller is then re-activated.
Figure 15-13. Example of a Suspend/Resume Management
A USB device can be allowed by the Host to send an upstream resume for Remote Wake-up
purpose.
When the USB controller receives the SET_FEATURE request: DEVICE_REMOTE_WAKEUP,
the firmware should set to 1 the RMWUPE bit in the USBCON register to enable this functional-
ity. RMWUPE value should be 0 in the other cases.
If the device is in SUSPEND mode, the USB controller can send an upstream resume by clear-
ing first the SPINT bit in the USBINT register and by setting then to 1 the SDRMWUP bit in the
USBCON register. The USB controller sets to 1 the UPRSM bit in the USBCON register. All
clocks must be enabled first. The Remote Wake is sent only if the USB bus was in Suspend
state for at least 5ms. When the upstream resume is completed, the UPRSM bit is reset to 0 by
hardware. The firmware should then clear the SDRMWUP bit.
Detection of a SUSPEND State
Detection of a RESUME State
WUPCPU
SPINT
microcontroller in Power-down
Clear WUPCPU Bit
USB Controller Init
Clear SUSPCLK
Set SUSPCLK
Clear SPINT
Disable PLL
Enable PLL
AT8xC51SND1C
95
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