em78f644nso28s ELAN Microelectronics Corp, em78f644nso28s Datasheet - Page 37

• Manufacturer Part Number: em78f644nso28s
• Description: Flash Series 8-bit Microcontroller
• Manufacturer: ELAN Microelectronics Corp

Product Specification (V1.0) 05.05.2010
(This specification is subject to change without further notice)
TC2CK2 TC2CK1 TC2CK0
Bit 3 (TC2S): Timer/Counter 2 start control
Bit 2~Bit 0 (TC2CK2~TC2CK0): Timer/Counter 2 clock source select
0
0
0
0
1
1
1
1
For F641/541N, Bit 7 ~ Bit 6 can’t set as “11” Bit 5 ~ Bit 0 are unused. Set to “0” all
the time.
0
0
1
1
0
0
1
1
0: Stop and clear the counter
1: Start Timer/Counter 2
Figure 6-4a Timer/Counter 2 Configuration Block Diagram
0
1
0
1
0
1
0
1
Clock Source Resolution Max. Time Resolution Max. Time
External clock
Normal, Idle
(TC2 pin)
Fc/2
Fc/2
Fc/2
Fc/2
Fc
−
−
23
13
8
3
EM78F648/644/642/641/548/544/542/541N
2.1 sec
2.048 ms
64 µs
2 µs
250 ns
NOTE
Fc=4M
−
−
−
38.2 hr
134.22 sec 512 ms
4.194 sec
131.072 ms
16.384 ms
Fc=4M
−
−
−
524.3 s
16 ms
0.5 ms
0.0625 ms
8-Bit Microcontroller
Fc=16K
−
−
−
9544 hr
33554.432 s
1048.576 s
32768 ms
4096 ms
Fc=16K
−
−
−
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