MC68F375BGMZP33 Freescale Semiconductor, MC68F375BGMZP33 Datasheet - Page 104

• 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

4.3.8.7 Loss of Reference Signal
MC68F375
REFERENCE MANUAL
EXTERNAL CLOCK?
The SCIM2E includes circuitry to detect a loss of the synthesizer f
reset or to allow continued operation from an alternate clock source. The LOSCD,
SLIMP, and RSTEN bits in SYNCR control and report the behavior of the clock syn-
thesizer when f
In the SCIM2E, f
lator to detect failure. The loss of clock detector should always be triggered when f
falls below 150 Hz and should never be triggered when f
range provides a window of uncertainty sufficiently large enough to compensate for
SETUP INTERRUPT
TO WAKE UP MCU
ON IN LPSTOP?
ENTER LPSTOP
FROM LPSTOP
WANT CLKOUT
SET STEXT = 1
YES
YES
f
f
IN LPSTOP
clkout
eclk
USING
=
2
1. THE SCIMCLK IS USED BY THE PIT, IRQ, AND INPUT BLOCKS OF THE SCIM2E.
2. CLKOUT CONTROL DURING LPSTOP IS OVERRIDDEN BY THE EXOFF BIT IN SCIMMCR. IF EXOFF = 1, THE CLKOUT
= f
f
PIN IS ALWAYS IN A HIGH IMPEDANCE STATE AND STEXT HAS NO EFFECT IN LPSTOP. IF EXOFF = 0, CLKOUT
IS CONTROLLED BY STEXT IN LPSTOP.
sys
sys
NO
NO
ref
ref
loss is detected.
SINGLE-CHIP INTEGRATION MODULE 2 (SCIM2E)
is compared to the output of an independent free-running RC oscil-
USE SYSTEM CLOCK
Freescale Semiconductor, Inc.
AS SCIMCLK IN
SET STSCIM = 1
For More Information On This Product,
SET STEXT = 0
f
LPSTOP?
f
YES
scimclk
clkout
IN LPSTOP
IN LPSTOP
f
eclk
Figure 4-6 LPSTOP Flowchart
2
= 0 Hz
1
= 0 Hz
= f
sys
Go to: www.freescale.com
Rev. 25 June 03
NO
SET STSCIM = 0
ON IN LPSTOP?
WANT CLKOUT
SET STEXT = 1
f
IN LPSTOP
YES
IN LPSTOP
scimclk
f
f
clkout
eclk
= 0 Hz
2
1
= f
= f
ref
ref
NO
ref
is above 20 KHz. This
SET STEXT = 0
f
clkout
IN LPSTOP
f
ref
eclk
2
signal and to force
= 0 Hz
= 0 Hz
LPSTOPFLOW
MOTOROLA
4-22
ref