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参数资料
| 型号： | MC68HC05RC8P |
| 厂商： | MOTOROLA INC |
| 元件分类： | 微控制器/微处理器 |
| 英文描述： | 8-BIT, MROM, 2.1 MHz, MICROCONTROLLER, PDIP28 |
| 封装： | PLASTIC, DIP-28 |
| 文件页数： | 94/122页 |
| 文件大小： | 445K |
| 代理商： | MC68HC05RC8P |
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Carrier Modulator Transmitter (CMT)
Carrier Generator
MC68HC05RC16 — Rev. 3.0
General Release Specification
MOTOROLA
Carrier Modulator Transmitter (CMT)
73
PH0–PH5 and PL0–PL5 — Primary Carrier High and Low Time Data
Values
When selected, these bits contain the number of input clocks required
to generate the carrier high and low time periods. When operating in
time mode (see 9.5.1 Time Mode), this register pair is always
selected. When operating in FSK mode (see 9.5.2 FSK Mode), this
register pair and the secondary register pair are alternately selected
under control of the modulator. The primary carrier high and low time
values are undefined out of reset. These bits must be written to
nonzero values before the carrier generator is enabled to avoid
spurious results.
NOTE:
Writing to CHR1 to update PH0–PH5 or to CLR1 to update PL0–PL5 will
also update the IRO latch. When MCGEN (bit 0 in the MCSR) is clear,
the IRO latch value appears on the IRO output pin. Care should be taken
that bit 7 of the data to be written to CHR1 or CHL1 should contain the
desired state of the IRO latch.
SH0–SH5 and SL0–SL5 — Secondary Carrier High and Low Time Data
Values
When selected, these bits contain the number of input clocks required
to generate the carrier high and low time periods. When operating in
time mode (see 9.5.1 Time Mode), this register pair is never selected.
When operating in FSK mode (see 9.5.2 FSK Mode), this register pair
and the secondary register pair are alternately selected under control
Address:
$0013
Bit 7
654321
Bit 0
Read:
0
SL5
SL4
SL3
SL2
SL1
SL0
Write:
Reset:
0
UUUUUU
U = Unaffected
Figure 9-6. Carrier Generator Data Register CLR2
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