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参数资料
型号： MC68CK338CPV14B1
厂商： FREESCALE SEMICONDUCTOR INC
元件分类： 微控制器/微处理器
英文描述： 32-BIT, 14.4 MHz, MICROCONTROLLER, PQFP144
封装： PLASTIC, TQFP-144
文件页数： 126/133页
文件大小： 944K
代理商： MC68CK338CPV14B1
MOTOROLA
MC68CK338
92
MC68CK338TS/D
IN2 — Clock Input Pin Status
This read-only status bit reflects the logic state of the clock input pin. Writing to this bit has no effect,
nor does reset.
NOTE
The clock input of MCSM2 is internally connected to I/O pin CTD27 for DASM27
and will read the state of that pin. The clock inputs of MCSM30 and MCSM31 are
internally connected to I/O pin CTD5 for DASM5 and will read the state of that pin.
IN1 — Modulus Load Input Pin Status
This read-only status bit reflects the logic state of the modulus load input pin. Writing to this bit has no
effect, nor does reset.
NOTE
The load input of MCSM2 is internally connected to I/O pin CTD29 for DASM29 and
will read the state of that pin. The load input of MCSM30 is internally connected to
I/O pin CTD4 for DASM4 and will read the state of that pin. The load input of
MCSM31 is available externally on the CTM31L pin.
EDGEN, EDGEP — Modulus Load Edge Sensitivity Bits
These read/write control bits select the sensitivity of the edge detection circuitry on the modulus load
pin CTML. Refer to Table 53.
CLK[2:0] — Counter Clock Select
These read/write control bits select one of six internal clock signals (PCLK[1:6]) or one of two external
conditions on the external clock input pin (rising edge or falling edge). The maximum frequency of the
external clock signals is fsys/4. Refer to Table 54.
Table 53 Modulus Load Edge Sensitivity
EDGEN
EDGEP
IN1 Edge Detector Sensitivity
0
None
0
1
Positive edge only
1
0
Negative edge only
1
Positive and negative edge
Table 54 Counter Clock Select
CLK2
CLK1
CLK0
Free-Running Counter Clock Source
000
PCLK1 (fsys ÷ 2 or fsys ÷ 3)
001
PCLK2 (fsys ÷ 4 or fsys ÷ 6)
010
PCLK3 (fsys ÷ 8 or fsys ÷ 12)
011
PCLK4 (fsys ÷ 16 or fsys ÷ 24)
100
PCLK5 (fsys ÷ 32 or fsys ÷ 48)
101
PCLK6 (fsys ÷ 64 or fsys ÷ 768)
1
0
External clock input, falling edge
1
External clock input, rising edge
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Freescale Semiconductor, Inc.
For More Information On This Product,
Go to: www.freescale.com
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