NEC PD78214 User Manual
Page 183
154
µ
PD78214 Sub-Series
Fig. 7-59 Timing of Interval Timer Operation (2) (When CR11 Is Used As a Compare Register)
Remark Interval = (n + 1)
× x/f
CLK
, 0
≤ n ≤ FFH
x = 16, 32, 64, 128, 256, 512
Fig. 7-60 Setting of Control Registers for Interval Timer Operation (2)
(a) Timer control register 1 (TMC1)
(b) Prescaler mode register 1 (PRM1)
(c) Capture/compare control register 1 (CRC1)
7
6
5
4
3
2
1
0
0
0
0
0
1
CRC1
Disables clearing TM1, when CR10
coincides with TM1
Specifies the CR11 register as a compare
register
Enables clearing TM1, when CR11
coincides with TM1
0
0
0
0H
TM1
count value
n
Compare register
(CR11)
INTC11
interrupt request
Interrupt accepted
Interval time
Interval time
Interrupt accepted
Cleared
Cleared
n
n
Coincidence
Coincidence
Count starts
7
6
5
4
3
2
1
0
0
0
0
0
1
TMC1
Overflow flag
Enables counting TM1
Ч
Ч
Ч
7
6
5
4
3
2
1
0
PRS10
0
PRM1
Ч
Ч
Ч
PRS12 PRS11
×
Specifies count clock
(x/f
CLK
; where x = 16, 32, 64,
128, 256, or 512)