User Manual

ATAR862-3

4556B–4BMCU–02/03

Timer 2 Compare Mode

Address: "7"hex - Subaddress: "3"hex

Timer 2 COmpare Register 1

(T2CO1)

Address: "7"hex - Subaddress: "4"hex

In prescaler mode the clock is bypassed if the compare register T2CO1 contains 0.

Timer 2 COmpare Register 2

(T2CO2) Byte Write

Address: "7"hex - Subaddress: "5"hex

Bit 3Bit 2Bit 1Bit 0

T2OTM T2CTM T2RM T2IM Reset value: 0000b

T2OTM Timer 2 Overflow Toggle Mask bit

T2OTM = 0, disable overflow toggle

T2OTM = 1, enable overflow toggle, a counter overflow (OVF2) toggles output

flip-flop (TOG2). If the T2OTM-bit is set, only a counter overflow can

generate an interrupt except on the Timer 2 output mode 7.

T2CTM Timer 2 Compare Toggle Mask bit

T2CTM = 0, disable compare toggle

T2CTM = 1, enable compare toggle, a match of the counter with the compare

when the T2CTM-bit is set, only a match of the counter with the

compare register can generate an interrupt.

T2RM Timer 2 Reset Mask bit

T2RM = 0, disable counter reset

T2RM = 1, enable counter reset, a match of the counter with the compare register

resets the counter

T2IM Timer 2 Interrupt Mask bit

T2IM = 0, disable Timer 2 interrupt

T2IM = 1, enable Timer 2 interrupt

Timer 2 Output Mode T2OTM T2CTM Timer 2 Interrupt Source

1, 2, 3, 4, 5 and 6 0 x Compare match (CM2)

1, 2, 3, 4, 5 and 6 1 x Overflow (OVF2)

7 x 1 Compare match (CM2)

Write cycle Bit 3 Bit 2 Bit 1 Bit 0 Reset value: 1111b

First write cycle Bit 3 Bit 2 Bit 1 Bit 0 Reset value: 1111b

Second write cycle Bit 7 Bit 6 Bit 5 Bit 4 Reset value: 1111b