s908ab32ag0cfue Freescale Semiconductor, Inc, s908ab32ag0cfue Datasheet - Page 225
s908ab32ag0cfue
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s908ab32ag0cfue
Description
M68hc08 Microcontrollers
Manufacturer
Freescale Semiconductor, Inc
Datasheet
1.S908AB32AG0CFUE.pdf
(392 pages)
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13.7 I/O Registers
13.7.1 PIT Status and Control Register
MC68HC908AB32
Freescale Semiconductor
—
Rev. 1.1
Address:
bits. Some status bits have a two-step read/write clearing procedure. If
software does the first step on such a bit before the break, the bit cannot
change during the break state as long as BCFE is at logic zero. After the
break, doing the second step clears the status bit.
The following I/O registers control and monitor operation of the PIT:
The PIT status and control register does the following:
Reset:
Read:
Write:
•
•
•
•
•
•
•
•
PIT status and control register (PSC)
PIT counter registers (PCNTH:PCNTL)
PIT counter modulo registers (PMODH:PMODL)
Enables PIT interrupt
Flags PIT overflows
Stops the PIT counter
Resets the PIT counter
Prescales the PIT counter clock
Figure 13-3. PIT Status and Control Register (PSC)
$004B
POF
Bit 7
Programmable Interrupt Timer (PIT)
0
0
= Unimplemented
POIE
6
0
PSTOP
1
5
PRST
0
4
0
Programmable Interrupt Timer (PIT)
0
3
0
PPS2
0
2
PPS1
1
0
Technical Data
PPS0
Bit 0
0
225
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