em78f644nso28s ELAN Microelectronics Corp, em78f644nso28s Datasheet - Page 49

• 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)
6.1.43 Bank 3 RD TC3CR (Timer 3 Control)
Bits 7 ~ 6 (TC3FF1 ~ TC3FF0): Timer/Counter 3 flip-flop control
Bit 5 (TC3S): Timer/Counter 3 start control
Bits 4 ~ 2 (TC3CK2 ~ TC3CK0): Timer/Counter 3 clock source select
TC3CK2 TC3CK1 TC3CK0
Bits 1 ~ 0 (TC3M1 ~ TC3M0): Timer/Counter 3 operating mode select
TC3FF1
Bit 7
0
0
0
0
1
1
1
1
TC3FF0
0
0
1
1
0
0
1
1
Bit 6
0: Stop and clear the counter
1: Start Timer/Counter 3
TC3M1
0
1
0
1
0
1
0
1
TC3FF1
0
0
1
1
TC3S
Bit 5
0
0
1
1
Clock Source Resolution Max. Time Resolution Max. Time
External clock
Normal, Idle
(TC3 pin)
Fc/2
Fc/2
Fc/2
Fc/2
Fc/2
Fc/2
Fc
TC3CK2
EM78F648/644/642/641/548/544/542/541N
11
7
5
3
2
1
Bit 4
TC3M0
0
1
0
1
512 µs
32 µs
8 µs
2 µs
1 µs
500 ns
250 ns
Fc=4M
TC3CK1
-
Bit 3
TC3FF0
0
1
0
1
131072 µs 128 ms
8192 µs
2048 µs
512 µs
256 µs
128 µs
64 µs
Timer/Counter
Reserved
Programmable Divider Output
Pulse Width Modulation Output
Fc=4M
TC3CK0
Bit 2
-
Operating Mode
8-Bit Microcontroller
8 ms
2 ms
500 µs
250 µs
125 µs
62.5 µs
Fc=16K
Operating Mode
TC3M1
Bit 1
Clear
Toggle
Set
Reserved
-
32768 ms
2048 ms
512 ms
16 ms
128 ms
64 ms
32 ms
Fc=16K
TC3M0
Bit 0
-
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