T89C51CC01CA-7CTIM Atmel, T89C51CC01CA-7CTIM Datasheet - Page 72

• Manufacturer Part Number: T89C51CC01CA-7CTIM
• Description: IC 8051 MCU FLASH 32K 64BGA
• Manufacturer: Atmel
• Series: AT89C CANr

Specifications of T89C51CC01CA-7CTIM

• Core Processor: 8051
• Core Size: 8-Bit
• Speed: 40MHz
• Connectivity: CAN, UART/USART
• Peripherals: POR, PWM, WDT
• Number Of I /o: 34
• Program Memory Size: 32KB (32K x 8)
• Program Memory Type: FLASH
• Eeprom Size: 2K x 8
• Ram Size: 1.25K x 8
• Voltage - Supply (vcc/vdd): 3 V ~ 5.5 V
• Data Converters: A/D 8x10b
• Oscillator Type: External
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 64-BGA
• For Use With: AT89STK-06 - KIT DEMOBOARD 8051 MCU W/CAN
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Other names: T89C51CC01CA7CTIM

Watchdog Programming
72
A/T89C51CC01
The three lower bits (S0, S1, S2) located into WDTPRG register permit to program the
WDT duration.
Table 52. Machine Cycle Count
To compute WD Time-Out, the following formula is applied:
Note:
The following table outlines the time-out value for Fosc
Table 53. Time-Out Computation
S2
0
0
0
0
1
1
1
1
S2
0
0
0
0
1
1
1
1
Svalue represents the decimal value of (S2 S1 S0)
FTime Out
S1
0
0
1
1
0
0
1
1
–
S1
0
0
1
1
0
0
1
1
=
---------------------------------------------------------------------------- -
6 2
×
S0
0
1
0
1
0
1
0
1
WDX2
S0
0
1
0
1
0
1
0
1
∧
Fosc = 12 MHz
X2
F
131.07 ms
262.14 ms
524.29 ms
osc
16.38 ms
32.77 ms
65.54 ms
(
1.05 s
2.10 s
2
14
×
2
Svalue
)
XTAL
Fosc = 16 MHz
Machine Cycle Count
196.56 ms
393.12 ms
786.24 ms
12.28 ms
24.57 ms
49.14 ms
98.28 ms
1.57 s
= 12 MHz in X1 mode
2
2
2
2
2
2
2
2
14
15
17
18
19
20
21
16
- 1
- 1
- 1
- 1
- 1
- 1
- 1
- 1
Fosc = 20 MHz
4129N–CAN–03/08
157.28 ms
314.56 ms
629.12 ms
19.66 ms
39.32 ms
78.64 ms
9.82 ms
1.25 s