NEC uPD78056Y - Manual (Page 232)

232
CHAPTER 9 8-BIT TIMER/EVENT COUNTERS 1 AND 2
(3) Square-wave output operation
Operates as square wave output with any selected frequency at intervals of the count value preset to 8-bit
compare register 10 and 20 (CR10, CR20).
The TO1/P31 or TO2/P32 pin output status is reversed at intervals of the count value preset to CR10 or CR20
by setting bit 0 (TOE1) or bit 4 (TOE2) of the 8-bit timer output control register (TOC1) to 1. This enables
a square wave with any selected frequency to be output.
Table 9-8. 8-Bit Timer/Event Counters 1 and 2 Square-Wave Output Ranges
Minimum Pulse Width Maximum Pulse Width Resolution
MCS = 1 MCS = 0 MCS = 1 MCS = 0 MCS = 1 MCS = 0
2
×
1/f X 2 2 ×
1/f X 2 9 ×
1/f X 2 10 ×
1/f X 2
×
1/f X 2 2 ×
1/f X
(400 ns) (800 ns) (102.4
µ
s) (204.8
µ
s) (400 ns) (800 ns)
2 2 ×
1/f X 2 3 ×
1/f X 2 10 ×
1/f X 2 11 ×
1/f X 2 2 ×
1/f X 2 3 ×
1/f X
(800 ns) (1.6
µ
s) (204.8
µ
s) (409.6
µ
s) (800 ns) (1.6
µ
s)
2 3 ×
1/f X 2 4 ×
1/f X 2 11 ×
1/f X 2 12 ×
1/f X 2 3 ×
1/f X 2 4 ×
1/f X
(1.6
µ
s) (3.2
µ
s) (409.6
µ
s) (819.2
µ
s) (1.6
µ
s) (3.2
µ
s)
2 4 ×
1/f X 2 5 ×
1/f X 2 12 ×
1/f X 2 13 ×
1/f X 2 4 ×
1/f X 2 5 ×
1/f X
(3.2
µ
s) (6.4
µ
s) (819.2
µ
s) (1.64 ms) (3.2
µ
s) (6.4
µ
s)
2 5 ×
1/f
X
2 6 ×
1/f
X
2 13 ×
1/f
X
2 14 ×
1/f
X
2 5 ×
1/f
X
2 6 ×
1/f
X
(6.4
µ
s) (12.8
µ
s) (1.64 ms) (3.28 ms) (6.4
µ
s) (12.8
µ
s)
2 6 ×
1/f
X
2 7 ×
1/f
X
2 14 ×
1/f
X
2 15 ×
1/f
X
2 6 ×
1/f
X
2 7 ×
1/f
X
(12.8
µ
s) (25.6
µ
s) (3.28 ms) (6.55 ms) (12.8
µ
s) (25.6
µ
s)
2 7 ×
1/f
X
2 8 ×
1/f
X
2 15 ×
1/f
X
2 16 ×
1/f
X
2 7 ×
1/f
X
2 8 ×
1/f
X
(25.6
µ
s) (51.2
µ
s) (6.55 ms) (13.1 ms) (25.6
µ
s) (51.2
µ
s)
2 8 ×
1/f X 2 9 ×
1/f X 2 16 ×
1/f X 2 17 ×
1/f X 2 8 ×
1/f X 2 9 ×
1/f X
(51.2
µ
s) (102.4
µ
s) (13.1 ms) (26.2 ms) (51.2
µ
s) (102.4
µ
s)
2 9 ×
1/f X 2 10 ×
1/f X 2 17 ×
1/f X 2 18 ×
1/f X 2 9 ×
1/f X 2 10 ×
1/f X
(102.4
µ
s) (204.8
µ
s) (26.2 ms) (52.4 ms) (102.4
µ
s) (204.8
µ
s)
2 11 ×
1/f X 2 12 ×
1/f X 2 19 ×
1/f X 2 20 ×
1/f X 2 11 ×
1/f X 2 12 ×
1/f X
(409.6
µ
s) (819.2
µ
s) (104.9 ms) (209.7 ms) (409.6
µ
s) (819.2
µ
s)
Remarks 1. f X : Main system clock oscillation frequency
2. MCS : Oscillation mode selection register (OSMS) bit 0
3. Values in parentheses when operated at f
X
= 5.0 MHz.