T89C5115-TISUM Atmel, T89C5115-TISUM Datasheet - Page 70

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

Specifications of T89C5115-TISUM

• 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-SOIC (7.5mm Width)
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 89C5115-TISUM

70
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
-