MC908AP32CFBE Freescale, MC908AP32CFBE Datasheet - Page 73

• Manufacturer Part Number: MC908AP32CFBE
• Manufacturer: Freescale

Specifications of MC908AP32CFBE

• Cpu Family: HC08
• Device Core Size: 8b
• Frequency (max): 8MHz
• Interface Type: SCI/SPI
• Total Internal Ram Size: 2KB
• # I/os (max): 32
• Number Of Timers - General Purpose: 4
• Operating Supply Voltage (typ): 3.3/5V
• Operating Supply Voltage (max): 5.5V
• Operating Supply Voltage (min): 2.7V
• On-chip Adc: 8-chx10-bit
• Instruction Set Architecture: CISC
• Operating Temp Range: -40C to 85C
• Operating Temperature Classification: Industrial
• Mounting: Surface Mount
• Pin Count: 44
• Package Type: PQFP
• Program Memory Type: Flash
• Program Memory Size: 32KB
• Lead Free Status / RoHS Status: Compliant

5.2.2 TBM Reference Clock Selection
The timebase module reference clock (OSCCLK) is selected by configuring two bits in the CONFIG2
register, at $001D. See
Freescale Semiconductor
OSCSEL1
0
0
1
1
Address:
The internal oscillator is a free running oscillator and is available after each
POR or reset. It is turned-off in stop mode by setting the STOP_ICLKDIS
bit in CONFIG2.
The RCCLK or XCLK is only available if that clock is selected as the CGM
reference clock, whereas the ICLK is always available.
Reset:
Read:
Write:
OSCSEL0
OSCCLK1
0
1
0
1
ICLKDIS
Table 5-2. Timebase Module Reference Clock Selection
STOP_
$001D
0
0
1
1
Bit 7
Chapter 3 Configuration & Mask Option Registers (CONFIG &
0
Figure 5-3. Configuration Register 2 (CONFIG2)
RCLKEN
STOP_
Table 5-1. CGMXCLK Clock Selection
CGMXCLK
6
0
MC68HC908AP Family Data Sheet, Rev. 4
RCCLK
XCLK
ICLK
—
XCLKEN
STOP_
OSCCLK0
5
0
0
1
0
1
OSC2 Pin
output of
Inverting
OSCCLK1 OSCCLK0
NOTE
NOTE
X-TAL
f
f
BUS
BUS
—
4
0
3
0
Not used
Internal oscillator generates the CGMXCLK.
RC oscillator generates the CGMXCLK.
Internal oscillator is available after each POR or
reset.
X-tal oscillator generates the CGMXCLK.
Internal oscillator is available after each POR or
reset.
Timebase Clock Source
Internal oscillator (ICLK)
RC oscillator (RCCLK)
X-tal oscillator (XCLK)
2
0
0
Not used
Comments
1
0
0
SCIBD-
SRC
Bit 0
MOR).
0
Clock Selection
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