T89C51CC01CA-RLTIM Atmel, T89C51CC01CA-RLTIM Datasheet - Page 66
![IC 8051 MCU FLASH 32K 44VQFP](/photos/6/92/69202/313-44-vqfp_sml.jpg)
T89C51CC01CA-RLTIM
Manufacturer Part Number
T89C51CC01CA-RLTIM
Description
IC 8051 MCU FLASH 32K 44VQFP
Manufacturer
Atmel
Series
AT89C CANr
Datasheets
1.T89C51CC01CA-7CTIM.pdf
(167 pages)
2.T89C51CC01CA-7CTIM.pdf
(12 pages)
3.T89C51CC01CA-7CTIM.pdf
(32 pages)
4.T89C51CC01CA-7CTIM.pdf
(29 pages)
Specifications of T89C51CC01CA-RLTIM
Core Processor
8051
Core Size
8-Bit
Speed
40MHz
Connectivity
CAN, UART/USART
Peripherals
POR, PWM, WDT
Number Of I /o
32
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
44-TQFP, 44-VQFP
For Use With
AT89STK-06 - KIT DEMOBOARD 8051 MCU W/CAN
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
Other names
T89C51CC01CARLTIM
Available stocks
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Manufacturer
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- T89C51CC01CA-7CTIM PDF datasheet
- T89C51CC01CA-7CTIM PDF datasheet #2
- T89C51CC01CA-7CTIM PDF datasheet #3
- T89C51CC01CA-7CTIM PDF datasheet #4
- Current page: 66 of 167
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Timer 2
Figure 36. Auto-Reload Mode Up/Down Counter
66
Auto-Reload Mode
A/T89C51CC01
T2
see section “Clock”
CLOCK
FT2
The T89C51CC01 timer 2 is compatible with timer 2 in the 80C52.
It is a 16-bit timer/counter: the count is maintained by two eight-bit timer registers, TH2
and TL2 that are cascade- connected. It is controlled by T2CON register (See Table )
and T2MOD register (See Table 48). Timer 2 operation is similar to Timer 0 and Timer
1. C/T2 selects F
timer clock. Setting TR2 allows TL2 to be incremented by the selected input.
Timer 2 includes the following enhancements:
•
•
The auto-reload mode configures timer 2 as a 16-bit timer or event counter with auto-
matic reload. This feature is controlled by the DCEN bit in T2MOD register (See
Table 48). Setting the DCEN bit enables timer 2 to count up or down as shown in
Figure 36. In this mode the T2EX pin controls the counting direction.
When T2EX is high, timer 2 counts up. Timer overflow occurs at FFFFh which sets the
TF2 flag and generates an interrupt request. The overflow also causes the 16-bit value
in RCAP2H and RCAP2L registers to be loaded into the timer registers TH2 and TL2.
When T2EX is low, timer 2 counts down. Timer underflow occurs when the count in the
timer registers TH2 and TL2 equals the value stored in RCAP2H and RCAP2L registers.
The underflow sets TF2 flag and reloads FFFFh into the timer registers.
The EXF2 bit toggles when timer 2 overflow or underflow, depending on the direction of
the count. EXF2 does not generate an interrupt. This bit can be used to provide 17-bit
resolution.
Auto-reload mode (up or down counter)
Programmable clock-output
:6
T2 clock
T2CON.1
CT/2
0
1
(DOWN COUNTING RELOAD VALUE)
/6 (timer operation) or external pin T2 (counter operation) as
(UP COUNTING RELOAD VALUE)
RCAP2L
(8-bit)
(8-bit)
(
TL2
8-bit)
FFh
RCAP2H
(
(8-bit)
TH2
(8-bit)
8-bit)
FFh
T2CON.2
TR2
T2EX:
1=UP
2=DOWN
TOGGLE
T2CONreg
TF2
T2CONreg
EXF2
INTERRUPT
TIMER 2
4129N–CAN–03/08
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