MC68HC05X16 Datasheet, PDF (125/232 Pages) Freescale Semiconductor, Inc – High-density complementary metal oxide semiconductor HCMOS) microcontroller unit

Freescale Semiconductor, Inc.
8
PULSE LENGTH D/A CONVERTERS
The pulse length D/A converter (PLM) system works in conjunction with the timer to execute two
8-bit D/A conversions, with a choice of two repetition rates. (See Figure 8-1.)
Data bus
8
PLMA
register
8
PLMB
register
‘A’ register
buffer
‘B’ register
buffer
8
PLMA
D/A
pin
‘A’
comparator
‘B’
comparator
R
Latch
S
R
Latch
S
Zero detector
SFA
bit
8
‘A’
multiplexer
16
Zero detector
8
‘B’
SFB
multiplexer
bit
16
Timer bus
Figure 8-1 PLM system block diagram
PLMB
D/A
pin
From timer
MC68HC05X16
PULSE LENGTH D/A CONVERTERS
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8-1
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