T48C862x-Rf-TNQ datasheet(50/107 Pages) ATMEL

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T48C862-R4 [Preliminary]

4551C–4BMCU–01/04

Timer 2 Registers

Timer 2 has 6 control registers to configure the timer mode, the time interval, the input

clock and its output function. All registers are indirectly addressed using extended

addressing as described in section "Addressing Peripherals". The alternate functions of

the Ports BP41 or BP42 must be selected with the Port 4 control register P4CR, if one of

the Timer 2 modes require an input at T2I/BP41 or an output at T2O/BP42.

Timer 2 Control Register (T2C)

Address: "7"hex - Subaddress: "0"hex

Table 16.

Timer 2 Clock Select Bits

Timer 2 Mode Register 1

(T2M1)

Address: "7"hex - Subaddress: "1"hex

Bit 3Bit 2Bit 1Bit 0

T2CS1

T2CS0

T2TS

T2R

Reset value: 0000b

T2CS1

imer 2 Clock Select bit 1

T2CS0

imer 2 Clock Select bit 0

T2CS1

T2CS0

Input Clock (CL 2/1) of Counter Stage 2/1

System clock (SYSCL)

Output signal of Timer 1 (T1OUT)

Internal shift clock of SSI (SCL)

Output signal of Timer 3 (TOG3)

T2TS

imer 2 Toggle with Start

T2TS = 0, the output flip-flop of Timer 2 is not toggled with the timer start

T2TS = 1, the output flip-flop of Timer 2 is toggled when the timer is started with

T2R

imer 2 Run

T2R = 0, Timer 2 stop and reset

T2R = 1, Timer 2 run

Bit 3Bit 2Bit 1Bit 0

T2D1

T2D0

T2MS1

T2MS0

Reset value: 1111b

T2D1

imer 2 Duty cycle bit 1

T2D0

imer 2 Duty cycle bit 0

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