em78f644nso28s ELAN Microelectronics Corp, em78f644nso28s Datasheet - Page 87

• 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)
TC2 interrupt
Internal clock
Up-counter
TC2 pin
TCR2
In Window mode, counting up is performed on rising edge of the pulse that is logical
AND of an internal clock and of the TC2 pin (window pulse). When the contents of
up-counter match the TCR2 (TCR2H+TCR2L), the interrupt is then generated and the
counter is cleared. The frequency (window pulse) must be slower than the
selected internal clock.
When writing to the TCR2L, the comparison is inhibited until TCR2H is written.
6.3.52 Bank0 R4C: TCR2DH (Timer 2 High Byte Data Buffer
Bits 7~0 (TCR2D15~ TCR2D8): 16-bit Timer/Counter 2 of high byte data buffer
TCR2D15 TCR2D14 TCR2D13 TCR2D12 TCR2D11 TCR2D10
Bit 7
Figure 6-9c Counter Mode Timing (INT2ES = 1) Diagram
Bit 6
n
0
Figure 6-9d Window Mode Timing Diagram
1
2
Bit 5
EM78F648/644/642/641/548/544/542/541N
n-3
Bit 4
Register)
n-2
Bit 3
match
Bit 2
n-1
8-Bit Microcontroller
n
TCR2D9
0
Bit 1
counter clear
1
2
TCR2D8
Bit 0
3
• 77