Fujitsu MB89202, F202RA manual Setting of Interval Timer Function in 16-bit Mode, 188

CHAPTER 8 8/16-BIT CAPTURE TIMER/COUNTER

●16-bit mode

To operate timer 0 as the interval timer function in the 16-bit mode, the function must be set as shown in

Figure 8.6-4 .

Figure 8.6-4 Setting of Interval Timer Function in 16-bit Mode

	bit7	bit6	bit5	bit4	bit3	bit2	bit1	bit0
TCCR	CPIF	CFCLR CPIEN CCMSK TCMSK EDGS1 EDGS0 RESV
						Setting of 00
TCR1	TIF1	TFCR1 T1IEN			TCS12 TCS11 TCS10			TSTR1
					1	1	1
TCR0	TIF0	TFCR0	T0IEN	CINV	TCS02 TCS01 TCS00 TSTR0
					Setting of a value
					other than 111
TCR2							PEN	TSEL
								0
TDR1		Setting of higher 8 bits of interval time
TDR0		Setting of lower 8 bits of interval time
	: Used bit
	: Unused bit
0	: Set "0"
1	: Set "1"

In the 16-bit mode, timers are controlled by the timer 0 control register (TCR0), but the timer 1 control register (TCR1) must be initialized. The values to be set in the data register are the higher 8 bits of TDR1 and the lower 8 bits of TDR0 (16 bits in total). The values are compared with the 16-bit counter value. The 16 bits of the counter are cleared at the same time. Other operations in the 16-bit mode are the same as timer 0 operation in the 8-bit mode.

188