AT89C5122D-RDRIM Atmel, AT89C5122D-RDRIM Datasheet - Page 112
![IC MCU 80C51 W/SMART CARD 64VQFP](/photos/6/81/68127/313-64-vqfp_sml.jpg)
AT89C5122D-RDRIM
Manufacturer Part Number
AT89C5122D-RDRIM
Description
IC MCU 80C51 W/SMART CARD 64VQFP
Manufacturer
Atmel
Series
89Cr
Specifications of AT89C5122D-RDRIM
Core Processor
8051
Core Size
8-Bit
Speed
48MHz
Connectivity
SmartCard, SPI, UART/USART, USB
Peripherals
LED, POR, WDT
Number Of I /o
46
Program Memory Size
32KB (32K x 8)
Program Memory Type
FLASH
Ram Size
768 x 8
Voltage - Supply (vcc/vdd)
3 V ~ 5.5 V
Oscillator Type
Internal
Operating Temperature
-40°C ~ 85°C
Package / Case
64-TQFP, 64-VQFP
For Use With
AT89STK-10 - KIT EVAL APPL MASS STORAGEAT89STK-03 - KIT STARTER FOR MCU AT8XC5122/23
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
Eeprom Size
-
Data Converters
-
Other names
AT89C5122DRDRIMTR
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Detach Simulation
112
AT83R5122, AT8xC5122/23
In order to be re-enumerated by the Host, the AT83R5122, AT8xC5122/23 has the pos-
sibility to simulate a DETACH-ATTACH of the USB bus.
The V
D+ pull-up as shown in Figure 60. This output can be put in high-impedance when the
DETACH bit is set to 1 in the USBCON register. Maintaining this output in high imped-
ance for more than 3 μs will simulate the disconnection of the device. When resetting
the DETACH bit, an ATTACH is then simulated. The USB controller should be enabled
to use this feature.
Figure 60. Example of V
Figure 61. Disconnect Timing
V
IHZ(min)
V
V
REF
SS
IL
output voltage is between 3.0V and 3.6V. This output can be connected to the
D+
D-
V
Disconnected
REF
D-
D+
Device
REF
R2
R3
Connection
R1
>= 2,5 s
1
2
3
4
USB-B Connector
D-
D+
GND
VCC
Disconnect
Detected
4202F–SCR–07/2008
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