MC9S08RG60 Datasheet, PDF (109/232 Pages) Motorola, Inc – Microcontrollers

SoC Guide — MC9S08RG60/D Rev 1.10
MCGEN — Modulator and Carrier Generator Enable
Setting MCGEN will initialize the carrier generator and modulator and enable all clocks. After it is
enabled, the carrier generator and modulator will function continuously. When MCGEN is cleared, the
current modulator cycle will be allowed to expire before all carrier and modulator clocks are disabled
(to save power) and the modulator output is forced low. To prevent spurious operation, the user should
initialize all data and control registers before enabling the system.
1 = Modulator and carrier generator enabled
0 = Modulator and carrier generator disabled
7.6.4 CMT Modulator Data Registers (CMTCMD1, CMTCMD2, CMTCMD3, and
CMTCMD4)
The modulator data registers control the mark and space periods of the modulator for all modes. The
contents of these registers are transferred to the modulator down counter and space period register upon
the completion of a modulation period.
CMTCMD1 Bit 7
6
5
4
3
2
1
Bit 0
Read:
MB15 MB14 MB13 MB12 MB11 MB10 MB9
MB8
Write:
Reset:
Unaffected by Reset
CMTCMD2 Bit 7
6
5
4
3
2
1
Bit 0
Read:
MB7
MB6
MB5
MB4
MB3
MB2
MB1
MB0
Write:
Reset:
Unaffected by Reset
CMTCMD3 Bit 7
6
5
4
3
2
1
Bit 0
Read:
SB15 SB14 SB13 SB12 SB11 SB10 SB9
SB8
Write:
Reset:
Unaffected by Reset
CMTCMD4 Bit 7
6
5
4
3
2
1
Bit 0
Read:
SB7
SB6
SB5
SB4
SB3
SB2
SB1
SB0
Write:
Reset:
Unaffected by Reset
Figure 7-11 CMT Modulator Data Registers
(CMTCMD1, CMTCMD2, CMTCMD3, and CMTCMD4)
Freescale Semiconductor
MC9S08RC/RD/RE/RG
109