AN1740 Freescale Semiconductor / Motorola, AN1740 Datasheet - Page 31

• Manufacturer Part Number: AN1740
• Description: Applications Using the Analog Subsystem on MC68HC05JJ/JP Series Microcontrollers
• Manufacturer: Freescale Semiconductor / Motorola

AN1740
MOTOROLA
TEMPERATURE
CHANNEL
SELECT
BUS
INTERNAL
DIODE
60 k
60 k
V
DD
DHOLD
DIODE
HOLD
Freescale Semiconductor, Inc.
HOLD
For More Information On This Product,
Figure 13. Comparator Input Bus
0
0
1
1
AMUX register
(HOLD) • (DHOLD)
–
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SAMPLE
Table 5. Comparator Input Bus Selections
(10 PF)
(HOLD) • (DHOLD)
(HOLD) • (DHOLD) • (VOFF)
OFFSET
(HOLD) • (DHOLD)
CAP
100 MV
DHOLD
0
1
0
1
COMPARATOR INPUT BUS
Open circuit; hold voltage on sample capacitor
Divided input from channel select bus
Direct input from channel select bus
Connected to internal temperature diode
DENOTES
INTERNAL
ANALOG V
TO PB0
Input source
SS
+
–
HOLD
DHOLD
AMUX
COMP2
VOFF
CP2EN
ASR
INV
Analog Signal Multiplexers
MASK OPTION
OPT
Application Note
CMP2
31