AT89C5122D-PSTUM Atmel, AT89C5122D-PSTUM Datasheet - Page 177

• Manufacturer Part Number: AT89C5122D-PSTUM
• Description: IC 8051 MCU FLASH 32K 64QFN
• Manufacturer: Atmel
• Series: 89Cr

Specifications of AT89C5122D-PSTUM

• 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-QFN
• For Use With: AT89STK-10 - KIT EVAL APPL MASS STORAGEAT89STK-03 - KIT STARTER FOR MCU AT8XC5122/23
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Data Converters: -

4202F–SCR–07/2008
Table 111. Timeout value for
Table 112. Watchdog Timer Enable register (Write Only) - WDTRST (A6h)
Reset Value = XXXX XXXXb
The WDTRST register is used to reset / enable the WDT by writing 1EH then E1H in
sequence.
7
-
S2
0
0
0
0
1
1
1
1
6
-
S1
0
0
1
1
0
0
1
1
5
-
F
CK_WD
S0
AT83R5122, AT8xC5122/23
= 24 MHz / X2
0
1
0
1
0
1
0
1
4
-
3
-
Timeout for F
2
-
131.07 ms
262.14 ms
524.29 ms
16.38 ms
32.77 ms
65.54 ms
4.10 ms
8.19 ms
CK_WD
= 24 MHz / X2
1
-
0
-
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