XC68HC705JJ7 Motorola, XC68HC705JJ7 Datasheet - Page 95
XC68HC705JJ7
Manufacturer Part Number
XC68HC705JJ7
Description
MICROCONTROLLER
Manufacturer
Motorola
Datasheet
1.XC68HC705JJ7.pdf
(242 pages)
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MC68HC705JJ7 • MC68HC705JP7 — REV 4
MOTOROLA
When using the PB4/AN4/TCMP/CMP1 pin, these interactions must be
noted:
1. If the OLVL timer output compare function is the required output
2. If the PB4 data bit is the required output function, then the DDRB4
3. If the comparator 1 output is the desired output function, then the
4. If the PB4 pin is to be an input to the analog subsystem or a digital
function, then the DDRB4 bit must be set, the PB4 data bit must
be cleared, and the OPT bit in the COPR must be cleared. The
PB4/AN4/TCMP/CMP1 pin becomes an output which follows the
state of the OLVL bit. The pulldown device will be disabled in this
case. The analog subsystem would not normally use this pin as an
analog input in this case.
bit must be set, the OLVL bit in the TCR must be cleared, and the
OPT bit in the COPR must be cleared. The pulldown device will be
disabled in this case. The analog subsystem would not normally
use this pin as an analog input in this case.
PB4 data bit must be cleared, the DDRB4 bit must be set, the
OLVL bit in the TCR must be cleared, and the OPT bit in the
COPR must be set. The PB4/AN4/TCMP/CMP1 pin becomes an
output which follows the state of the OLVL bit. The pulldown
device will be disabled in this case. The analog subsystem would
not normally use this pin as an analog input in this case.
input, then the DDRB4 bit must be cleared. In this case, the PB4
pin can still be read, but the voltage present will be returned as a
binary value. Depending on the external application, the PB4
pulldown may also be disabled by setting the PDIB4 pulldown
inhibit bit. In this case, both the digital and analog functions
connected to this pin can be utilized.
Parallel Input/Output
Advance Information
Parallel Input/Output
Port B
95
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