T89C5115-SISIM Atmel, T89C5115-SISIM Datasheet - Page 70

• Manufacturer Part Number: T89C5115-SISIM
• Description: IC 8051 MCU FLASH 16K 28PLCC
• Manufacturer: Atmel
• Series: 89Cr

Specifications of T89C5115-SISIM

• Core Processor: 8051
• Core Size: 8-Bit
• Speed: 40MHz
• Connectivity: UART/USART
• Peripherals: POR, PWM, WDT
• Number Of I /o: 20
• Program Memory Size: 16KB (16K x 8)
• Program Memory Type: FLASH
• Eeprom Size: 2K x 8
• Ram Size: 512 x 8
• Voltage - Supply (vcc/vdd): 3 V ~ 5.5 V
• Data Converters: A/D 8x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 28-PLCC
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

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AT89C5115
Table 52. WDTRST Register
WDTRST (S:A6h Write Only) – Watchdog Timer Enable register
Reset Value = 1111 1111b
Note:
Number
Bit
7
-
7
The WDRST register is used to reset/enable the WDT by writing 1EH then E1H in
sequence without instruction between these two sequences.
Mnemonic Description
Bit
6
-
-
Watchdog Control Value
5
-
4
-
3
-
2
-
1
-
4128G–8051–02/08
0
-