SH79F024XU datasheet(31/92 Pages) SINOWEALTH

31 / 92 page

SH79F

SH79F082

082

Mode

Mode 1:

1: 16-bit

16-bit

16-bit Counter/Timer

Counter/Timer

Mode 1 operation is the same as Mode 0, except that the counter/timer registers use all 16 bits. The counter/timers are

enabled and configured in Mode 1 in the same manner as for Mode 0.

TLx

(8bits)

THx

(8bits)

TFx

Overflow

GATEx

TRx

C/Tx

0:Switch Off

1:Switch On

The Block Diagram of mode1 of Timerx ( x=0,1 )

Interrupt

Request

Overflow

Flag

System Clock

C/Tx=0 and TCx=1

INTx

Note:

Note: Tx (x = 0), timer1 without T1 pin.

Mode

Mode 2:

2: 8-bit

8-bit

8-bit Counter/Timer

Counter/Timer

Counter/Timer with

with

with Auto-Reload

Auto-Reload

Mode 2 configures Timer 0 and Timer 1 to operate as 8-bit counter/timers with automatic reload of the start value. TLx holds

the count and THx holds the reload value. When the counter in TLx overflows from 0xFF to THx, the timer overflow flag TFx

is set and the counter in TLx is reloaded from THx. If Timer 0 interrupts are enabled, an interrupt will occur when the TFx flag

is set. The reload value in TH0 is not changed. TLx 0 must be initialized to the desired value before enabling the timer for the

first count to be correct.

Except the Auto-Reload function, both counter/timers are enabled and configured in Mode 2 is the same as in Mode 0 & Mode

When as Timer, the T0 pin can automatically toggle upon Timer0 overflow by configuring TC0 in TCON1 Register. The T0

pin is automatically set as output by hardware when TC0 is set. Timer1 do not have T1 pin.

TFx

Interrupt

Request

TRx

C/Tx

The Block Diagram of mode2 of Timerx (x=0,1)

TL0

(8bits)

TH0

(8bits)

Reload

Sysem Clock

Overflow

Flag

overflow

0:Switch Off

1:Switch On

GATEx

C/Tx=0 and TCx=1

INTx

Note:

Note: Tx (x = 0), timer1 without T1 pin.

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