NEC PD750008 - Manual (Page 133)

113
CHAPTER 5 PERIPHERAL HARDWARE FUNCTIONS
Figure 5-31. Timer Counter Mode Register (Channel 1) Format
Address
FA8H
7 6
TM16
5
TM15
4
TM14
3
TM13
2
TM12
1 0 Symbol
TM1
TM13
Timer start indication bit
When 1 is written into the bit, the counter and IRQT1 flag are cleared.
If bit 2 is set to 1, count operation is started.
TM12
0
1
Operation mode
Stop (retention of count contents)
Count operation
Count operation
Other than above
Other than above
When f X = 4.19 MHz
TM15
0
0
1
1
TM16
1
1
1
1
TM14
0
1
0
1
f
X
/2 12 (1.02 kHz)
f X /2 10 (4.09 kHz)
f X /2 8 (16.4 kHz)
f
X
/2 6 (65.5 kHz)
Not to be set
Count pulse (CP)
Count pulse (CP) select bit
When f
X
= 6.00 MHz
TM15
0
0
1
1
TM16
1
1
1
1
TM14
0
1
0
1
f
X
/2 12 (1.46 kHz)
f
X
/2 10 (5.86 kHz)
f X /2 8 (23.4 kHz)
f X /2 6 (93.8 kHz)
Not to be set
Count pulse (CP)