T89C5115_08 ATMEL [ATMEL Corporation], T89C5115_08 Datasheet - Page 64
T89C5115_08
Manufacturer Part Number
T89C5115_08
Description
Low Pin Count 8-bit Microcontroller with A/D Converter and 16 KBytes Flash Memory
Manufacturer
ATMEL [ATMEL Corporation]
Datasheet
1.T89C5115_08.pdf
(113 pages)
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Registers
64
AT89C5115
Table 43. T2CON Register
T2CON (S:C8h)
Timer 2 Control Register
Reset Value = 0000 0000b
bit addressable
Number
TF2
Bit
7
7
6
5
4
3
2
1
0
Mnemonic Description
CP/RL2#
EXEN2
EXF2
RCLK
C/T2#
EXF2
TCLK
TR2
TF2
Bit
6
Timer 2 Overflow Flag
TF2 is not set if RCLK=1 or TCLK = 1.
Must be cleared by software.
Set by hardware on Timer 2 overflow.
Timer 2 External Flag
Set when a capture or a reload is caused by a negative transition on T2EX pin if
EXEN2=1.
Set to cause the CPU to vector to Timer 2 interrupt routine when Timer 2
interrupt is enabled.
Must be cleared by software.
Receive Clock bit
Clear to use timer 1 overflow as receive clock for serial port in mode 1 or 3.
Set to use Timer 2 overflow as receive clock for serial port in mode 1 or 3.
Transmit Clock bit
Clear to use timer 1 overflow as transmit clock for serial port in mode 1 or 3.
Set to use Timer 2 overflow as transmit clock for serial port in mode 1 or 3.
Timer 2 External Enable bit
Clear to ignore events on T2EX pin for Timer 2 operation.
Set to cause a capture or reload when a negative transition on T2EX pin is
detected, if Timer 2 is not used to clock the serial port.
Timer 2 Run Control bit
Clear to turn off Timer 2.
Set to turn on Timer 2.
Timer/Counter 2 Select bit
Clear for timer operation (input from internal clock system: f
Set for counter operation (input from T2 input pin).
Timer 2 Capture/Reload bit
If RCLK=1 or TCLK=1, CP/RL2# is ignored and timer is forced to auto-reload on
Timer 2 overflow.
Clear to auto-reload on Timer 2 overflows or negative transitions on T2EX pin if
EXEN2=1.
Set to capture on negative transitions on T2EX pin if EXEN2=1.
RCLK
5
TCLK
4
EXEN2
3
TR2
2
C/T2#
OSC
1
).
4128G–8051–02/08
CP/RL2#
0
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