MC68F375BGMZP33 Freescale Semiconductor, MC68F375BGMZP33 Datasheet - Page 96

• Manufacturer Part Number: MC68F375BGMZP33
• Description: IC MPU 32BIT 33MHZ 217-PBGA
• Manufacturer: Freescale Semiconductor

Specifications of MC68F375BGMZP33

• Processor Type: M683xx 32-Bit
• Speed: 33MHz
• Voltage: 5V
• Mounting Type: Surface Mount
• Package / Case: 217-PBGA
• Processor Series: M683xx
• Core: CPU32
• Data Bus Width: 32 bit
• Program Memory Type: Flash
• Program Memory Size: 256 KB
• Data Ram Size: 10 KB
• Interface Type: SPI, SCI, CAN
• Maximum Clock Frequency: 16 MHz
• Number Of Programmable I/os: 48
• Number Of Timers: 16
• Maximum Operating Temperature: + 125 C
• Mounting Style: SMD/SMT
• Minimum Operating Temperature: - 40 C
• On-chip Adc: 10 bit, 16 Channel
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Features: -
• Lead Free Status / Rohs Status: No

SYNCR — Synthesizer Control Register, Fast Reference Mode
SYNCR — Synthesizer Control Register, Slow Reference Mode
4.3.6 Clock Synthesizer Control Register
MC68F375
REFERENCE MANUAL
MSB
MSB
15
X
RESET:
0
15
X
0
RESET:
EXTAL
When the MC68F375 is configured in external clock mode, the VCO will be turned off
to save power. Changing the unused W bits will have no effect.
The synthesizer control register (SYNCR) is readable and writable in supervisor mode.
The encoding and default value of the upper byte of SYNCR depend on the clock
mode selected at reset.
For slow reference mode, the default value is 0x3F which corresponds to an operating
frequency of 8.38 MHz for a 32.768-KHz crystal. For fast reference mode, the default
value of the upper byte is 0x30, which corresponds to a 2-to-1 match of the reference
frequency. For external clock mode, the default value of the upper byte is 0x80, which
corresponds to an operating frequency equal to the input frequency on EXTAL. The
default value is forced into the SYNCR on reset, along with the default values of the
other bits in the register (all zeros).
The encodings and default reset states of the bits in SYNCR in the three clock modes
are shown below.
14
0
14
W
0
W[2:0]
13
1
13
1
/2
12
1
12
1
11
—
0
11
1
SINGLE-CHIP INTEGRATION MODULE 2 (SCIM2E)
Y
Freescale Semiconductor, Inc.
10
10
0
1
Y[2:0] Bits
For More Information On This Product,
Figure 4-4 External Clock Mode
(Y<6)
9
1
/(2
9
Y
0
Y
)
8
1
Go to: www.freescale.com
8
0
EDIV
EDIV
Rev. 25 June 03
7
0
7
0
served
served
Re-
6
0
Re-
6
0
LOSCD
LOSCD
X Bit
/(2-X)
5
0
5
0
SLIMP
SLIMP
4
0
4
0
SLOCK
SLOCK
3
1
3
1
/2
RSTEN
RSTEN STSCIM
2
0
2
0
System Clock
STSCIM
0xYF FA04
0xYF FA04
1
0
MOTOROLA
1
0
STEXT
STEXT
LSB
LSB
0
0
4-14
0
0