Timer Clock Select Register 1 Format - NEC PD78052 User Manual

Symbol 7 6 5
TCL1 TCL17 TCL16 TCL15 TCL14 TCL13 TCL12 TCL11 TCL10
TCL13 TCL12 TCL11 TCL10
0 0 0
0 0 0
0 1 1
0 1 1
1 0 0
1 0 0
1 0 1
1 0 1
1 1 0
1 1 0
1 1 1
1 1 1
Other than above
TCL17 TCL16 TCL15 TCL14
0 0 0
0 0 0
0 1 1
0 1 1
1 0 0
1 0 0
1 0 1
1 0 1
1 1 0
1 1 0
1 1 1
1 1 1
Other than above
Caution When rewriting TCL1 to other data, stop the timer operation beforehand.
Remarks 1. f
XX
2. f
X
3. TI1
4. TI2
5. MCS : Oscillation mode selection register (OSMS) bit 0
6. Figures in parentheses apply to operation with f
224
CHAPTER 9 8-BIT TIMER/EVENT COUNTERS 1 AND 2
Figure 9-4. Timer Clock Select Register 1 Format
4 3 2 1 0
8-Bit Timer Register 1 Count Clock Selection
MCS = 1
0 TI1 falling edge
1 TI1 rising edge
0
f /2 f /2 (2.5 MHz)
XX X
2 2
1
f /2 f /2 (1.25 MHz)
XX X
3 3
0
f /2 f /2 (625 kHz)
XX X
4 4
1
f /2 f /2 (313 kHz)
XX X
5 5
0
f /2 f /2 (156 kHz)
XX X
6 6
1 f /2 f /2 (78.1 kHz)
XX X
7 7
f /2 f /2 (39.1 kHz)
0
XX X
8 8
f /2 f /2 (19.5 kHz)
1
XX X
9 9
f /2 f /2 (9.8 kHz)
0
XX X
11 11
f /2 f /2 (2.4 kHz)
1
XX X
Setting prohibited
8-Bit Timer Register 2 Count Clock Selection
MCS = 1
0 TI2 falling edge
1 TI2 rising edge
0
f /2 f /2 (2.5 MHz)
XX X
2 2
1
f /2 f /2 (1.25 MHz)
XX X
3 3
0 f /2 f /2 (625 kHz)
XX X
4 4
1
f /2 f /2 (313 kHz)
XX X
5 5
0 f /2 f /2 (156 kHz)
XX X
6 6
1 f /2 f /2 (78.1 kHz)
XX X
7 7
f /2 f /2 (39.1 kHz)
0
XX X
8 8
f /2 f /2 (19.5 kHz)
1
XX X
9 9
f /2 f /2 (9.8 kHz)
0
XX X
11 11
f /2 f /2 (2.4 kHz)
1 XX X
Setting prohibited
: Main system clock frequency (f
: Main system clock oscillation frequency
: 8-bit timer register 1 input pin
: 8-bit timer register 2 input pin
Address After Reset R/W
FF41H 00H R/W
MCS = 0
2
f /2 (1.25 MHz)
X
3
f /2 (625 kHz)
X
4
f /2 (313 kHz)
X
5
f /2 (156 kHz)
X
6
f /2 (78.1 kHz)
X
7
f /2 (39.1 kHz)
X
8
f /2 (19.5 kHz)
X
9
f /2 (9.8 kHz)
X
10
f /2 (4.9 kHz)
X
12
f /2 (1.2 kHz)
X
MCS = 0
2
f /2 (1.25 MHz)
X
3
f /2 (625 kHz)
X
4
f /2 (313 kHz)
X
5
f /2 (156 kHz)
X
6
f /2 (78.1 kHz)
X
7
f /2 (39.1 kHz)
X
8
f /2 (19.5 kHz)
X
9
f /2 (9.8 kHz)
X
10
f /2 (4.9 kHz)
X
12
f /2 (1.2 kHz)
X
or f /2)
X X
= 5.0 MHz
X