em78f644nso28s ELAN Microelectronics Corp, em78f644nso28s Datasheet - Page 123

• 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)
Fosc
Data Bus
Fosc
1:128
1:256
1:128
1:256
1:64
1:64
1:32
1:32
1:16
1:16
1:8
1:4
1:8
1:2
1:4
1:2
TAP2 TAP1 TAP0 TAEN
TBP2 TBP1 TBP0 TBEN
MUX
MUX
6.9.2 Increment Timer Counter (TMRX: TMRAH/L or TMRBH/L)
TMRX are 10-bit clock counters with programmable prescalers. They are designed
as baud rate clock generators for the PWM module. TMRX is Read only. When is
use, they can be turned off for power saving by setting the TAEN or TBEN bits to “0”.
Figure 6-21a Two PWMs Functional Block Diagram
Cycle
Duty
Period
DTA = TMRA
DTAH
DTAL
Figure 6-21b PWM Output Timing
+
DTBH
DTBL
TMRBH + TMRBL
TMRAH +TMRAL
PRDA
PRDB
+
EM78F648/644/642/641/548/544/542/541N
DLAH +DLAL
Comparator
Comparator
Comparator
Comparator
PRDA = TMRA
DLBH + DLBL
reset
reset
latch
latch
Duty Cycle
Duty Cycle
Match
R
S
Match
R
S
Match
Match
Period
Period
8-Bit Microcontroller
Q
Q
PWMAIF
PWMBIF
To
Bank3,
Bank3,
R7<1>
R7<0>
Data Bus
To
PWMA
PWMB
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