Processor Users Manual

4-41 MPC8260 PowerQUICC II UserÕs Manual MOTOROLA
Part II. ConÞguration and Reset
4.3.2.15 Time Counter Register (TMCNT)
The time counter register (TMCNT), shown in Figure 4-36, contains the current value of
the time counter.
4.3.2.16 Time Counter Alarm Register (TMCNTAL)
The time counter alarm register (TMCNTAL), shown in Figure 4-37, holds a value
(ALARM). When the value of TMCNT equals ALARM, a maskable interrupt is generated.
14 TCF Time counter frequency. The input clock to the time counter may be either 4 MHz or 32 KHz. The
user should set the TCF bit according to the frequency of this clock.
0 The input clock to the time counter is 4 MHz.
1 The input clock to the time counter is 32 KHz.
See Section 4.1.2, ÒTimers ClockÓ for further details.
15 TCE Time counter enable. Is not affected by soft or hard reset.
0 The time counter is disabled.
1 The time counter is enabled.
Bits 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
Field TMCNT
Reset Ñ
R/W R/W
Addr 0x10224
Bits 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31
Field TMCNT
Reset Ñ
R/W R/W
Addr 0x10226
Figure 4-36. Time Counter Register (TCMCNT)
Table 4-19. TMCNTSC Field Descriptions (Continued)
Bits Name Description