MC68F375BGMZP33 Freescale Semiconductor, MC68F375BGMZP33 Datasheet - Page 347

• 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

8.3.9 Prescaler Control for TCR2
MC68F375
REFERENCE MANUAL
Timer count register 2 (TCR2), like TCR1, is clocked from the output of a prescaler.
The T2CG (TCR2 clock/gate control) bit and the T2CSL (TCR2 counter clock edge) bit
in TPUMCR determine T2CR2 pin functions. Refer to
The function of the T2CG bit is shown in
When T2CG is set, the external T2CLK pin functions as a gate of the DIV8 clock (the
TPU3 system clock divided by eight). In this case, when the external TCR2 pin is low,
the DIV8 clock is blocked, preventing it from incrementing TCR2. When the external
TCR2 pin is high, TCR2 is incremented at the frequency of the DIV8 clock. When
T2CG is cleared, an external clock from the TCR2 pin, which has been synchronized
and fed through a digital filter, increments TCR2. The duration between active edges
on the T2CLK clock pin must be at least nine system clocks.
The TCR2PSCK2 bit in TPUMCR3 determines whether the clock source is divided by
two before it is fed into the TCR2 prescaler. The TCR2 field in TPUMCR specifies the
value of the prescaler: 1, 2, 4, or 8. Channels using TCR2 have the capability to
DIV2
System
Clock
EPSCKE
T2CSL
Enhanced
Freescale Semiconductor, Inc.
Prescaler
2,4,6,...64
Table 8-3 TCR2 Counter Clock Source
0
0
1
1
Prescaler
For More Information On This Product,
32 / 4
Figure 8-2 TCR1 Prescaler Control
TIME PROCESSOR UNIT 3
Go to: www.freescale.com
Rev. 25 June 03
T2CG
PSCK
MUX
0
1
0
1
Figure
Rise & fall transition T2CLK
Rise transition T2CLK
Fall transition T2CLK
Gated system clock
8-3.
TCR2 Clock
PRESCALER
1,2,4,8
TCR1
Table
8-3.
TCR1
MOTOROLA
8-7