Computer Hardware User Manual

Carrier Modulator Transmitter (CMT)
General Release Specification MC68HC05RC16 — Rev. 3.0
82 Carrier Modulator Transmitter (CMT) MOTOROLA
MCGEN — Modulator and Carrier Generator Enable
Setting MCGEN will initialize the carrier generator and modulator and
will enable all clocks. Once 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. The user should initialize all data and control
registers before enabling the system to prevent spurious operation.
This bit is cleared by reset.
1 = Modulator and carrier generator enabled
0 = Modulator and carrier generator disabled